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Patent US20040033079 - Flexible, dense line card architecture - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe invention is relevant to optical fiber transmission systems, and in particular, pertains to the transceiver cards in an optical fiber transport system. In particular the invention teaches an improved transceiver card architecture that allows high density, flexibility and interchangeability of fu...http://www.google.com/patents/US20040033079?utm_source=gb-gplus-sharePatent US20040033079 - Flexible, dense line card architectureAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS20040033079 A1Publication typeApplicationApplication numberUS 10/455,774Publication dateFeb 19, 2004Filing dateJun 4, 2003Priority dateJun 4, 2002Also published asUS7729617, US8155519, US8750713, US20100241913, US20120155882, WO2003103187A1Publication number10455774, 455774, US 2004/0033079 A1, US 2004/033079 A1, US 20040033079 A1, US 20040033079A1, US 2004033079 A1, US 2004033079A1, US-A1-20040033079, US-A1-2004033079, US2004/0033079A1, US2004/033079A1, US20040033079 A1, US20040033079A1, US2004033079 A1, US2004033079A1InventorsSamir Sheth, Marvin Young, Jeffrey Cox, John AyresOriginal AssigneeSheth Samir Satish, Young Marvin R., Cox Jeffrey Lloyd, Ayres John W.Export CitationBiBTeX, EndNote, RefManPatent Citations (99), Referenced by (84), Classifications (5), Legal Events (7) External Links: USPTO, USPTO Assignment, EspacenetFlexible, dense line card architecture
US 20040033079 A1Abstract
The invention is relevant to optical fiber transmission systems, and in particular, pertains to the transceiver cards in an optical fiber transport system. In particular the invention teaches an improved transceiver card architecture that allows high density, flexibility and interchangeability of functionality. Images(9) Claims(1)
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority to Provisional Application Serial No. 60/385,946, entitled “Line Card Architecture”, by Sheth, et al. filed Jun. 4, 2002.
TECHNICAL FIELD OF THE INVENTION [0002] The invention is relevant to optical fiber transmission systems, and in particular, pertains to the transceiver cards in an optical fiber transport system. In particular the invention teaches an improved transceiver card architecture that allows high density, flexibility and interchangeability of functionality. BACKGROUND OF THE INVENTION [0003] A goal of many modem long haul optical transport systems is to provide for the efficient transmission of large volumes of voice traffic and data traffic over trans-continental distances at low costs. Various methods of achieving these goals include time division multiplexing (TDM) and wavelength division multiplexing (WDM). In time division multiplexed systems, data streams comprised of short pulses of light are interleaved in the time domain to achieve high spectral efficiency, high data rate transport. In wavelength division multiplexed systems, data streams comprised of short pulses of light of different carrier frequencies, or equivalently wavelength, are co-propagate in the same fiber to achieve high spectral efficiency, high data rate transport. [0004] The transmission medium of these systems is typically optical fiber. In addition there is a transmitter and a receiver. The transmitter typically includes a semiconductor diode laser, and supporting electronics. The laser may be directly modulated with a data train with an advantage of low cost, and a disadvantage of low reach and capacity performance. After binary modulation, a high bit may be transmitted as an optical signal level with more power than the optical signal level in a low bit. Often, the optical signal level in a low bit is engineered to be equal to, or approximately equal to zero. In addition to binary modulation, the data can be transmitted with multiple levels, although in current optical transport systems, a two level binary modulation scheme is predominantly employed. [0005] Typical long haul optical transport dense wavelength division multiplexed (DWDM) systems transmit 40 to 80 10 Gbps (gigabit per second) channels across distances of 1000 to 6000 km in a single 30 nm spectral band. A duplex optical transport system is one in which traffic is both transmitted and received between parties at opposite end of the link. In current DWDM long haul transport systems transmitters different channels operating at distinct carrier frequencies are multiplexed using a multiplexer. Such multiplexers may be implemented using array waveguide (AWG) technology or thin film technology, or a variety of other technologies. After multiplexing, the optical signals are coupled into the transport fiber for transmission to the receiving end of the link. [0006] At the receiving end of the link, the optical channels are de-multiplexed using a de-multiplexer. Such de-multiplexers may be implemented using array waveguide (AWG) technology or thin film technology, or a variety of other technologies. Each channel is then optically coupled to separate optical receivers. The optical receiver is typically comprised of a semiconductor photodetector and accompanying electronics. [0007] The total link distance may in today's optical transport systems be two different cities separated by continental distances, from 1000 km to 6000 km, for example. To successfully bridge these distances with sufficient optical signal power relative to noise, the total fiber distance is separated into fiber spans, and the optical signal is periodically amplified using an in-line optical amplifier after each fiber span. Typical fiber span distances between optical amplifiers are 50-100km. Thus, for example, 30 100 km spans would be used to transmit optical signals between points 3000 km apart. Examples of in-line optical amplifers include erbium doped fiber amplifers (EDFAs) and semiconductor optical amplifiers (SOAs). [0008] The architecture of current optical transport systems comprise a high degree of specialization. For example, the receiver line card is often separated from the transmitter line card so that the two cards are required at each terminal to achieve one channel of duplex operation. This configuration is inefficient in its use of space, power and logistical operation, and there is a need for an integrated line card with high density. [0009] A further limitation in the current art is the inflexibility of current transceiver cards. For example, in the current art, a transceiver card that supports the SONET standard, cannot support the Ethernet standard. Further, in the current art, a transceiver card that supports 4 OC48 SONET signals cannot support an OC192 SONET signals despite the fact that both of these signals have the same aggregate data rate of approximately 10 Gbps. There is, consequently, a need for a transceiver line card that is flexible to operate at different standards. [0010] A further limitation in the current art is the inflexibility of current transceiver cards to support different Forward Error Correction (FEC) standards. For example, in the current art, a transceiver card that supports a G.709 FEC with 7% overhead cannot support an extended FEC with 25% overhead. There is, consequently, a need for a transceiver line card that is flexible to support different FEC standards. [0011] Another limitation in the current art is the inflexibility of current transceiver cards to support different optical performances and capabilities. For example, a transceiver card that could be upgraded from the field to incorporate a tunable laser and be re-used in another location is not currently possible in the art. Furthermore, the mixing and matching of different optical reach performances (and associated costs) in the same systems is desirable by the industry but not available in the art of DWDM long haul transport systems. From a competitive perspective, the technology of the line optics portion of transceiver cards is often a critical driver to an optical transport system's competitive advantage through the incorporation of either higher performance components or lower cost components. There is consequently a need for a transceiver line card that is flexible to support tunable lasers, enhanced system performance, or cost reduction means through easy incorporation of state of the art line optics components. [0012] There are other limitations in the current art related to manufacturability and reliability of transceivers in optical systems. Transceivers of the prior art comprise a single large complex card with thousands of components. They must be manufactured and assembled in many stages before functional testing can be accomplished. The recognition of component failure during the late functional testing requires a complex and expensive rework process or scrapping the entire assembly. Since reliability of an entity decreases as the number of components increase, it is desirable to reduce the number of components per testable entity in the manufacturing process and in the final product. It is also desirable to make groups of these components field replaceable. There is consequently a need for a transceiver line card architecture that is functionally decomposed into a few integrated parts for manufacturability, testability, reliability, and for inventory reduction through the mix and match of the tested parts. [0013] In the prior art, a single microcontroller and power supply is required per optical channel. The invention architecture maximizes the number of optical channels per line card to reduce cost, power, and space; and to increase channel density. For example, only a single controller and power supply are required for up to four channels. SUMMARY OF THE INVENTION [0014] In the present invention, improvements to transceiver cards in optical transport systems in order to provide for high density, flexibility and interchangeability of functionality. The invention solves the above stated problems. [0015] In one aspect of the invention, a high density transceiver card is taught. The high density transceiver card can support up to four duplex channels in a single unit. [0016] In another aspect of the invention, a high density transceiver card that is flexible in the transmission standards that it supports is taught. [0017] In another aspect of the invention, a high density transceiver card is taught that is flexible in the FEC standards that it supports is taught. [0018] In another aspect of the invention, a transceiver line card architecture that is separated into functional modules is taught. In this aspect, the number of parts on each module is reduced from that of the prior art transceiver card in order to increase reliability. In this aspect, separation of the line optics card functions from the tributary module and tributary optics functions allows for interchangeability and flexibility to utilize different equipment and optical standards for different applications. [0019] In another aspect of the invention, a system for and method of assembling a customized modular transceiver card is taught. [0020] In yet another aspect of the invention, a “hot swappable” modular system is taught for a transceiver card. [0021] In yet another aspect of the invention, a method of testing and calibrating a modular transceiver card is taught. [0022] In yet another aspect of the invention, a method of performance monitoring system is taught for a modular transceiver card.
BRIEF DESCRIPTION OF THE DRAWINGS [0023] For a more complete understanding of the features and advantages of the present invention, reference is now made to the detailed description of the invention along with the accompanying figures in which corresponding numerals in the different figures refer to corresponding parts and in which: [0024] [0024]FIG. 1 is an illustration of terminals in a transport system [0025] [0025]FIG. 2 is a schematic illustration of line card modules in an architecture that is flexible in the transmission standards and FEC standards that it supports in accordance with the invention. [0026] [0026]FIG. 3 is a graphical depiction of a tributary module and tributary optics in accordance with the invention. [0027] [0027]FIG. 4 is a graphical depiction of a line optics module in accordance with the invention. [0028] [0028]FIG. 5 is a flow chart of a module selection method for transceiver card assembly in accordance with the invention. [0029] [0029]FIG. 6 is a schematic representation of the motherboard. [0030] [0030]FIG. 7 is a graphical depiction of the mechanical RF interface between the tributary and line optics module. [0031] [0031]FIG. 8 is a flow chart of a method of testing and calibrating a modular transceiver card for an optical transport system. DETAILED DESCRIPTION OF THE INVENTION [0032] While the making and using of various embodiments of the present invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments described herein are merely illustrative of specific ways to make and use the invention and do not delimit the scope of the invention. [0033] [0033]FIG. 1 shows two high density transceiver cards 100 and 150 that comprise two full duplex wavelengths of optical transport system 125. In the preferred embodiment, two full duplex channels are available. The multiple channel architecture provides sharing of microcontroller, FPGA, and power supply modules between channels. Channel 1 105 and channel 2 107 A-Z accepts client signals at the A terminal 100. The signals are converted to optical transport signals 115 and 117 for communication via optical backplane 280 to transport system 125. Transport signals 135 and 137 are received from transport system 125 are received at Z terminal 150 via optical backplane 281. Z terminal 150 demodulates the signals and regenerates original client signals as signals 155 and 157. The ZA path works similarly and allows connection between client signal 156 and 158 at the Z terminal 150 to client outputs 106 and 108 at the A terminal 100 via signals 136 and 116 and 138 and 118, respectively. DC power lines 101 and 151 consisting of redundant −48 VDC battery backed up power supplies 173 and 174 are received via electrical backplanes 170 and 171 which supply all required voltages and current at each terminal. Ethernet and discrete control signals 102 and 152 provide communications between various cards in each terminal. [0034] Among the cards in each terminal is a high density transceiver card. [0035] In FIG. 2 is shown a block diagram of a high density transceiver card 200 in terminal 100 that is flexible in the transmission standards and FEC standards that it supports. The high density transceiver card architecture comprises a functional arrangement of electrical, mechanical and optical components that, at a high level, provides short reach (typically less than 100 km) duplex operation with a data source such as a router or switch through the tributary optics, and also provides duplex operation with a long haul terminal, typically in a distant city. In operation data is exchanged between the data source and said long haul terminal in the distant city via optical transport system 125 that increases the distance covered by the transport system. [0036] High density is accomplished by maximizing the line card area, the number of channels per card, and using a single microcontroller per card. The line card is housed in a terminal which is 19 inches (width) by 23 inches (depth) by about 24 inches (height). After allocation of space for backplanes, fiber management, and fans, a 16 inch by 17.5 inch area is allocated (and height of 1.3 inches) is allocated for components. In the preferred embodiment, two optical channels are placed in this area, thus increasing density. As component sizes decrease, the number of channels may be expanded with similar designs of tributary modules and line optics modules. [0037] The transceiver card 200 is comprised of tributary optics modules 220 and 230, tributary modules 225 and 235, line optics modules 210 and 240, and motherboard 250. Transceiver card 200 is shown in relation to the optical backplane 280 and electrical backplane 170. Optical backplane 280 provides optical transport signals 115, 116, 117 and 118 between the various line cards at a terminal, as well as to the long haul transport fiber span (not shown). Electrical backplane 170 provides DC power 101 and control signal 102 between the various line cards. Transceiver card 200 is mechanically coupled to backplane 280 and 170 in order to support interchangeability of different transceiver cards via optical connector socket 260 and electrical connector 270. Tributary optical interface 201-204 functionally connects tributary optics modules 220 and 230 of the transceiver card with a data source (not shown) such as a router or a switch. In a preferred embodiment, tributary optical interface 201-204 is accomplished using a fiber optics connection, which may be either serial or parallel. [0038] Also shown in FIG. 2 are functional interconnections between modules. Tributary optics modules 220 and 230 are functionally connected to tributary modules 225 and 235 through client interfaces 221 and 231. In the architecture of the invention, the tributary optics can be one or more optical modules 220 or 230 that support up to an aggregate 10.7 bps bandwidth. In a preferred embodiment, client interface 221 and 231 are designed in an interchangeable manner by using a multiple supplier agreement (MSA) interface such as an MSA 300 compliant interface. In a second preferred embodiment, client interfaces 221 and 231 are accomplished with 4 OC48 SONET client optical interfaces using the MSA small form factor pluggable modules (SFP). In this second embodiment tributary optics module 220 and 230 may be integrated with tributary modules 225 and 235 if improved density is required. In a third preferred embodiment client interface 221 and 231 are accomplished by using 4 or 8 1 GbE Ethernet client interfaces. In this third embodiment tributary optics module 220 and 230 may be integrated with FEC module 225 and 235 if improved density is required. In a preferred embodiment, client interface 221 and 231 are accomplished in an interchangeable manner by using a parallel optic interface such as SNAP-12. Transceiver card 200 may employ any of the client interfaces (and others not described, but known in the art) in an interchangeable manner to efficiently support a variety of client interfaces, tributary optics interfaces, data standards such as SONET, Ethernet, Generic Framing Protocol (GFP), Video, and proprietary Time Division Multiplexing (TDM). Client interfaces 221 and 231 further comprise mechanical connectivity between tributary optics module 220 and 230 and tributary modules 225 and 235 to support interchangeability of different tributary optics modules and different FEC modules. Client interface 221 and 231 mechanical connectivity can comprise of insertion under power from the front panel as in the SFP and XFP standards or integration with the tributary module as in the MSA200, MSA300, or SNAP-12 standards. Insertion under power provides modification of the client interface without adversely affecting other signal traffic. [0039] Tributary modules 225 and 235 are functionally connected to the motherboard 250 through microwave interface 226-227 and 236-237 and electrical control interface 228 and 238. In a preferred embodiment microwave interface 226-227 and 236-237 comprise three microwave connectors that carry 10-14 Gbps serial data. The tributary module outputs 226 and 236 comprise transmitted data and transmitted clock to the motherboard 250. The tributary module inputs 227 and 237 comprises received data from the motherboard 250. A useful example of a microwave connector in this preferred embodiment is an SMP blind mating coaxial connector that allows insertion and mating of said interface from front panel without threading. Microwave interfaces 226-227 and 236-237 are mechanically connected to motherboard RF connector block 251 and 253 to support interchangeability of different tributary modules. [0040] Partition of the line optics modules 210 and 240 from the tributary modules 225 and 235 allows changing line optics modules dependent on wavelength, output power and modulation type. In the preferred embodiment, tributary module 225 and tributary optics module 220 form a single mechanical unit that is inserted from the front side of the line card 200. Similarly, tributary module 235 and tributary optics module 220 form a single mechanical unit. Furthermore, the cards may be inserted or removed under power; i.e., they are hot swappable as will be described further. Tributary module electrical interfaces 228 and 238 are mechanically connected to the motherboard with high density electrical connectors 254 and 252. High density electrical connectors 254 and 252 are placed adjacent RF connector blocks 251 and 253, respectively. In a preferred embodiment, tributary module electrical interfaces 228 and 238 comprise microcontroller communications busses, serial communications busses, discrete control, and power (not shown). High density connectors 254 and 252 are VHDM which allows blind mating. [0041] Tributary card insertion to the motherboard at the RF interface allows multiple client data types to be sent over a common transceiver card platform. The insertion into motherboard 250 at the interface 226, 227 and 228 allows multiple client data formats to be sent over a common platform. It also provides a design methodology for adding new interfaces. The architecture accommodates formats such as SONET where both data and timing transparency are desired. It accommodates Ethernet and other packet based formats where only data transparency is required. Also, in the case of fixed tuned DFB lasers, transceiver cards are wavelength specific. The invention accommodates the various specific wavelength by allowing transceiver card interchangeability. MSA tributary optics modules can be changed as a function of cost and distance supported (thus, also supporting interchangeability). [0042] Motherboard microwave interfaces 251 and 253 further comprise mechanical connectivity between line optics module 210 and 240 and motherboard 250 to support interchangeability of different line optics modules. The functional connection consists of transmit-receive pairs 214-215 and 244-245. Line optics modules 210 and 240 are functionally connected to optical backplane 280 through line optical interface 260. In a preferred embodiment, line optical interface 260 consists of the transmit-receive pairs 211-212 and 241-242 for the line optics modules 210 and 240. An individual ribbon connector plug containing 211 and 212 mechanically attaches to a single position of a four-position fiber optic ribbon connector 260 to accomplish connection of the transmit-receive pairs. A useful example of this type of connector is the HBMT which has four sockets that mate with four individual 8 or 12 fiber ribbons and each ribbon can easily accommodate the transmit-receive pairs. Line optical interface 260 further comprises mechanical connectivity for signals 115-118 between motherboard 250 and optical backplane 280 to support interchangeability of different transceiver cards 200 and different optical backplanes. Electrical interfaces 255 and 256 provide serial communication and discrete control between motherboard 250 and line optics modules 210 and 240 via signals 213 and 243. [0043] In FIG. 3 is shown a block diagram of the tributary module 225, and tributary optics module 220. Tributary module 235 and tributary optics module 230 are similar and a description will not be offered for brevity. Tributary optics module 220 receives the client optical signal 201 and converts to electrical signal signal 311. Signals 311, 312 and 313 are included in signal 221 of FIG. 2. An inline SERDES 320 converts the client serial data (at rate shown in Table 1, column 3) to parallel data (at the rate shown in Table 1, column 4), if required. [0044] Table 1 shows why the Line Card 200 is optimally partitioned at the output of the line side SERDES. The input formats may require different MSA standard modules ranging from 300 pin MSA transponders, SFP, XFP, or parallel optics. Depending on selection of the optical module, a client side SERDES may or may not be required. Depending on the number of input signals and their data rates, a mapping device to the 16 bit SFI-4 FEC interface may or may not be required. The SERDES 320 is required when either MSA module 220 does not have built-in SERDES 320 or client data rate is above 650 mbps. The PM/mapping device 330 is required when either performance monitoring is not provided in the FEC or SERDES; or when the client interface (Table 1, column 4) and FEC interface (Table 1, column 5) are different (e.g., 4×GBE); or timing transparency is required as in the 4×OC-48 Type B tributary module. The FEC 16-bit, SFI-4 interface can operate at clock rates of up to 650 MHz. The input and output clock rates have to be selected to match the data format as shown in Table 1. Therefore, everything from the MSA module to the line-side SERDES module is subject to change depending on the client interface requirements. Therefore, a partition at the line-side SERDES (350 and 360) is optimal and allows change of client interfaces without affecting the rest of the system. [0045] There are three types of tributary interfaces for transparent transport of client data. The type A tributary module has a client interface of about 10 Gbps and therefore no aggregation takes place. These interfaces are shown in the first two rows of the table as OC192, and 10GBE. The type B module is for transparent SONET aggregation with data rates of less than 2.5 Gbps aggregated onto the 10 Gbps optical transport path. An example of a 4×OC-48 module is shown that provides both data and timing transparency for plesiochronous aggregation. The type C cards are for aggregation of packet-based data communications standards on to the 10 Gbps channel. These cards use data communications standards such as Ethernet and Fiber Channel. Idle characters are inserted in the absence of packets. They only require data transparency but not timing transparency since idle characters can be added or removed to achieve packet transparency. The partition at the line-side SERDES allows tributary card designs that accommodate all three data types. Client FEC output Serial Rate (Gbps) Card Rate Client Parallel Data FEC Input Rate 25% Line Rate Format Type (Gbps) Rate (MHz) (MHz) Overhead (Gbps) OC192 A 9.953 16 × 622.08 16 × 622.08 16 × 777.6 12.44 10GBE A 10.3125 16 × 644.531 16 × 644.531 16 × 805.5 12.9 4 × OC-48 B 2.488*4 16 × 622.08 16 × 622.08 16 × 777.6 12.44 4 × GBE C 1.25 4 × 10 × 125.00 16 × 625.00 16 × 781 12.5 8 × GBE C 1.25 8 × 10 × 125.00 16 × 625.00 16 × 781 12.5 8 × GFC C 1.0625 TBD TBD TBD TBD 16 × OC-12 B 622.08 16 × 622.08 16 × 622.08 16 × 777.6 12.44 [0046] Table 1. The tributary card maps client interfaces to line side transport signals as shown. [0047] Returning to FIG. 3, the SERDES 320 is required when either the MSA module does not have a built in SERDES as in the SFP or when the client data rate is above 650 Mbps. An in-line performance monitoring/mapping device 330 is placed to translate the SERDES output to the FEC SFI-4 interface 321 (Table 1 column 5). The performance monitor block 330 collects PM data for SONET or packet-based (Ethernet, Fiber Channel) signals and ensures that the signals are received error-free from the client. The PM/mapping device 330 also transmits parallel client data (Table 1, Column 4) to the FEC 340 through interface 331 (Table 1, Column 5). In other preferred embodiments, PM/mapping device 330 may include one or more FPGA devices or ASICs. In one preferred embodiment, the FEC 340 encapsulates the signal with a 25% overhead Reed-Solomon/BCH concatenated code at the FEC output rate (Table 1 column 6). The output signal 341 has a data rate that is 1.25 times the input data rate. In another preferred embodiment, a seven percent overhead can be used such as the G.709 ITU standard. Signal 341 is input to the serializer 350. Serializer 350 converts the data from parallel to serial at FEC transport rate shown in Table 1 column 7. This is typically about 12.5 Gbps. The data and clock signals 226 are output to the RF connector block 251. [0048] Given that the interface between the line optics modules 210 and 240 and the tributary modules 225 and 235 electrically occur at the line side SERDES 350/360, and physically occur at connector blocks 251 and 253 where the signal frequencies of the signals 214, 215, 226, 227, 236, 237, 244, 245 correspond to Table 1, column 7, the broadband capability (as will be further described) of the line optics modules 210 and 240 enable a wide variety of tributary modules and client interfaces on the same transceiver line card 200 which is a significant advantage over the current art. [0049] Received signals 227, which also may perform the clock and data recovering function from the motherboard 250 are converted from serial to parallel at the deserializer 360. The parallel signal is input to the FEC 340 via signal 361. FEC 340 detects and corrects errors in the transmission. The FEC output signal 332 is sent to the MSA 220 by way of signal 332, PM/mapping device 330 (if required), signal 322, and SERDES 320 (if required). SERDES 320 serializes the transmission and sends it to tributary optics module 220 via signal 312. Tributary optics module 220 translates the signal back to the optical domain at 202. [0050] The FEC FPGA 335 enables control of the card from the motherboard 250 which houses the microcontroller 650 and software. FEC FPGA 335 is connected to motherboard 350 via VHDM 252. Signals 354, 382 and 383 are contained in signal 228 (as shown on FIG. 2) in relation to VHDM 252. The cpu_bus 382 is passed through FPGA 335 to line 333 to the FEC 340 and PM device 330. The cpu_bus accesses registers in these devices to configure and obtain status. The serial communications bus 383 arrives from the motherboard 250 to enable FPGA programming for serial communications with temperature sensors 395 and PMD 330. The FEC FPGA programs the serializer 350, deserializer 360, and threshold control 365 through connection 381 so that the transport signals are generated and received accurately. The power sequencer 370 distributes voltages from the motherboard and controls the power sequencing requirements for the card. Serial control line 313 between the FEC FPGA 335 and tributary optics module 220 serves to monitor various MSA parameters and alarms. The EEPROM 385 shares connection 382 with the cpu_bus and stores card configuration and calibration data allowing for independent assembly and calibration of tributary module units. [0051] In one embodiment, the timing subsystem 380 tracks the input signal 332 and generates an error signal 376 to generate recovered clock 375. The recovered clock(s) 375 are used as a reference to provide timing for output signal 322. In a second embodiment, the timing subsystem 380 generates a fixed reference 375 for output signal 322. [0052] FEC 340 has a built in pseudo random bit sequence (PRBS) generator and checker for test purposes. This feature is used in the system to verify the quality of the communications link prior to sending traffic. Prior to allowing traffic, the bit error rate for each channel is measured. If the BER is more than what the FEC can correct, then the channel is not provisioned. This method of measuring PRBS to verify the quality of the communications link allows channel verification without external test equipment. [0053] The tributary module can support neighbor discovery protocols used to determine network topology. The PM device(s) 330 can be used to implement packet over SONET neighbor discovery. The FEC device 340 can be used to support JO/DCC neighbor discovery for OC192. In another embodiment, the SERDES device can be used for JO/DCC neighbor discovery. [0054] [0054]FIG. 7B shows the RF connector block interface 251 on the motherboard 250. An identical RF connector block is found at 253. As shown in FIG. 7A, the RF connector block 251 mechanically resides on the motherboard and provides a blind mating interface to RF connectors 705, 710, and 715 (which in the preferred embodiment are SMP female-female adapters) on the tributary module 225. They engage with an SMP male edge-mount connectors on the tributary card PWB (printed wiring board) of the tributary module 225 with a full detent 10 lb force that secures them to the tributary module 225. The RF connector block receptacle (SMP-male) has no detent and is held in place with mechanical alignment thus accomplishing blind mating microwave electrical connection. Signal 214 is passed through as signal 227. Signal 226 is passed through as 215. Custom SMP to SMA cable assemblies 730, 740, and 750 provide the connection between the motherboard 250, RF connector 251 and line optics module 210. [0055] In FIG. 4 is a schematic representation of line optics module 210. Line optics module 240 is identical except that the laser 410 operates at a different wavelength. Line optics module 210 comprises photoreceiver 430, receiver electronic amplifier 432 and electronic low pass filter 434. Together photoreceiver 430, receiver electronic amplifier 432 and electronic low pass filter 434 constitute the receiving part of line optics module 210. An incoming optical data signal is received via signal 212 from optical connector 260. In a preferred embodiment, photoreceiver 430 is realized by a semiconductor photodetector, and converts received optical data into high speed electrical signals. In a preferred embodiment, receiver electronic amplifier may be realized by a stripline RF FET amplifier. In a preferred embodiment, electronic low pass filter 434 may be realized by stripline RF capacitors and RF inductors. Receiver electronic amplifier 432 amplifies said high speed electrical signals, and electronic low pass filter 434 rejects high frequency components that disproportionately contribute to noise. The output of low pass filter 434 is signal 214. [0056] Line optics module 210 further comprises data driver 420 and clock driver 422. In a preferred embodiment data driver 420 is realized by RF power electronics in a stripline package. In a preferred embodiment, clock driver 422 is realized by RF power electronics in a stripline package. Data driver 420 and clock driver 422 are connected to RF connector block 251. They receive data signals 433 and clock signal 435 from the motherboard (shown combined as signal 215 on FIG. 2). The clock driver 422 is narrowband and enables transmission between 8 Gbps and 13.5 Gbps. The data driver 420 is broadband and enables transmission up to 13.5 Gbps. The combination enables transmission of the optical signal 415 with bandwidths up to 13.5 Gbps. [0057] Line optics module 210 further comprises laser 410, RZ modulator section 412, NRZ modulator section 414 and optical splitter 416. Laser 410 is realized by an ITU grid compliant semiconductor laser. RZ modulator section 412 and NRZ modulator 414 are realized using lithium niobate modulators. In another embodiment RZ modulator section 412 and NRZ modulator 414 are realized electro-absorptive semiconductor modulators. Optical splitter 416 is realized using a 2% optical decoupler and is used to generate feedback control signals for the RZ and NRZ demodulators 442 and 444. [0058] Laser 410 provides a carrier signal modulated by RZ modulator section 412 and NRZ modulator section 414 and exits through optical splitter 416 as signal 211. The bandwidth of the output signal 211 is a function of RZ modulator 412, NRZ modulator 414, clock driver 422, and data driver 420. In the preferred embodiment, the RZ modulator 412 and NRZ modulator 414 are broadband enabling transmission of signals 215 with bandwidth up to 13.5 Gbps. One skilled in the art can adjust bandwidths of 412, 414, 420 and 422 to accommodate other bandwidths broader or narrower. [0059] Signal 211 enters optical connector 260. In particular, NRZ modulator section 414 encodes the data traffic onto the carrier. RZ modulator section 412, provides enhanced OSNR performance for ultra long haul transport application. [0060] Laser 410 current and temperature are set via bus 490 at a specified wavelength and power. Typically, monitor photodiodes in the laser assembly 410 provide multiple outputs to monitor power and wavelength. For example, a laser with integrated wavelength locker may output two voltages: the sum of the output voltages may provide an indication of power and the ratio of output voltages may indicate wavelength error for one laser type. For another laser type, one voltage may indicate power alone and one or more separate voltages may be used to indicate and/or control wavelength. There are several different types of lasers with different external interfaces corresponding to different methods and different accuracies in wavelength control. Thus, the preferred embodiment has the capability of implementing laser control in software via signals 490, control block 440 and microcontroller 650 allowing for change of laser type and control algorithm on the line optics module with just software changes. [0061] Control block 440 orchestrates the functions of line optics module 210 according to instructions from microcontroller 650 via signal bus 213 and signal bus 490. Control block 440 comprises analog to digital converters, switches, digital to analog converters, and an EEPROM. The EEPROM is used to store the card configuration and calibration values that are determined during the initial testing of the card. The EEPROM in 440 also stores the clock driver 422 phase for every tributary module 225 and is a function of the line rate (Table 1, column 7). Software reads the card type from the EEPROM 385 and configures clock driver phase 427 from the control block 440. The digital to analog converters configure the laser 410 and the clock and data drivers, 420 and 422, and receive amplifier 432. The analog to digital converter monitors the laser 410 operational parameters and clock and data driver (420 and 422) output voltages, and the various bias voltages in the bias circuitry 442 and 444. [0062] Control block 440 configures receive amplifier 432 to generate a constant output voltage at 214. The clock driver 422 and data driver 420 drive levels 423 and 421, which are optimally set to the RF Vπ voltage of the modulator stages 412 and 414. The clock signal 423 phase is adjusted such that 421 and 423 are in phase. This results in a high fidelity RZ signal at 211 provided modulators 412 and 414 are biased at quadrature. [0063] The bias circuitry 442 and 444 biases modulators 412 and 414, respectively, at quadrature. Bias circuit 444 generates a low frequency AM dither signal 445 (typically 10 kHz) that modulates on data amplifier 420. The modulation appears on signal 413 which is input to NRZ modulator 414. Modulator 414 combines the signal from the RZ modulator and the low frequency modulated data signal 421 into a RZ signal 415. Splitter 416 couples optical signal 415 into photodector and bandpass filter 446 where the dither signal is detected and filtered. Detected signal 447 is sent to a synchronous demodulator circuit 444 that adjusts bias 413 until dither signal 445 and detected signal 447 are in phase; when the phase error is zero, the modulator is biased at quadrature. Similarly, the RZ stage 412 bias voltage 411 is set at quadrature with dither signal 443 (typically 20 kHz) via detection and filter signal 448 and demodulator 442. Control block 440 monitors bias signals 411 and 413 via bias devices 442 and 444 and communicates this to microcontroller 650 via signals 213. [0064] The motherboard 250 is shown in FIG. 6. It provides power, command and control, and status monitoring for the Line Card. Microcontroller island 650 is a pluggable, modular assembly that resides on the motherboard 250 and contains the CPU. Software resides on the microcontroller island 650 and controls the line card. High density backplane connector 270 provides the electrical interface to the electrical backplane. In preferred embodiment, this interface consists of Ethernet, −48 VDC power and return, and discrete control signals over a high density connector such as HDM. A multi-position optical socket connector 260 provides the optical interface to the optical backplane and receives optical signals 115-118 from optical backplane 280. An example of such a connector is HBMT which can in the preferred embodiment have four positions to expand to 4 optical channels per transceiver card. The HBMT pigtail from each LOM plugs into a single position in the socket. VHDM connectors 252 and 254 provide the electrical interface to the tributary cards. [0065] DC power 671 from the electrical backplane is provided with a −48 VDC connection from the HDM connector 270. This is converted to the required voltages via DC-DC converters located in the power section 630 and distributed to the tributary cards 225 and 235 via lines 633 and 634, and line optics modules 210 and 240 via lines 631 and 632. The card is designed to provide and thermally accommodate 250W of power consumption for future expansion. [0066] Power section 630 also provides power to microcontroller 650 via 635. [0067] The HDM interface also provides communications with the ICM management card for the transport system. The communications interface 672 comprises an Ethernet bus, all_good signal, card presence indicator, and reset signal. The card presence is detected and is initialized from the ICM at start-up. The card provides an all_good signal to the ICM so that in the event of a communications failure, the ICM does not RESET the card and affect traffic if the failure is not traffic affecting. In the event of traffic affecting failures, the card is RESET to see if it recovers from the failure. [0068] Microcontroller island 650 controls tributary card 225 and 230 via signal bus 652 and isolation switch 640. Signal bus 652 comprises cpu_bus (microprocessor bus) and serial busses which are passed through the isolation switch 640 to signal busses 641-644. Signal 641 and 643 are the cpu_bus subsets from 652 to tributary card 225 via signal bus 228 and 238. Signals 642 and 644 comprise the serial bus subsets from 652 to tributary card 225 and 235 via signals 228 and 238. In the preferred embodiment, serial busses comprise SPI, I2C, and FPGA program bus. The serial bus provides communications with temperature sensors 395, MSA tributary optics 220 via FEC FPGA 335, and provides remote programming of FPGAs 335 and 330 from software. Microcontroller island 650 controls line optics modules 210 and 240 via signals 651 which passes through FPGA 620 to signal 621 and signal 622. Signals 213 comprise control signal bus 621 and power 631 for line optics 210. Similarly, 243 comprises control signal bus 622 and power 632. [0069] A structured performance monitoring process continually monitors the status of tributary modules 225 and 235, and line optics modules 210 and 240 from microcontroller 650. Tributary optics modules 220 and 230, optical receive power, optical transmit power, laser current and temperature are monitored via 383 and 313. Client data is monitored via PM device 330 (10 GPE), FEC 340 (OC192) or SERDES 320 (OC48) in this embodiment. The PM statistics are collected per SONET and Ethernet standards that are widely known. The line optics modules 210 and 240 are monitored via 213 to ensure the signal 415 is at the correct wavelength and power; verify modulator bias 411 and 413 at quadrature; and verify modulator drive levels 421 and 423 are set optimally. It also verifies that the optical signal 212 is received with specified input power and generates specified output voltage at 214. [0070] A combination of staged VHDM connectors 252 and 254 and isolation switches 640 allow tributary modules 225 and 235 insertion and removal under power. The VHDM connector 252 and 254 presence pin is shorter than power and signal pins. Thus, during engagement, presence is sensed only after power and signals have engaged with tributary module 225 and 235. Similarly, upon removal, absence is detected prior to removal of tributary module 225 and 230. The isolation switches 640 isolate signals 652 and 641-642 when tributary module 225 is removed. Similarly, 652 and 643-644 are isolated when tributary module 235 is removed. In this way, the tributary modules are independently hot-swappable. [0071] [0071]FIG. 5 is a flow chart illustrating a method of module selection for customized transceiver card assembly in accordance with another aspect of the invention. The method allows the design of a customized transceiver card 102. The method comprises a first step 810 of selecting the necessary FEC coding gain. In a preferred embodiment the choices include 9.4 dB coding gain with a 25% overhead (for a transmission line rate of 12.5 Gbps), 6 dB coding gain with a 7% overhead, or 10 dB coding gain with 25% overhead. Additionally, a digital wrapper may be selected with 7% overhead. Note that these choices are not restrictive; the invention will accommodate FEC devices with improved coding gain at the lower overhead rates when they become available. The method further comprises a second step 812 of selecting the desired 10 Gbps client interface. In a preferred embodiment the choices include OC192 SONET/SDH, 10 GbE Ethernet, 4×OC48 SONET/SDH, 10×1 GbE Ethernet, time division multiplexed interface, or some other interface with a data rate less than or equal to 10 Gbps. The method further comprises a third step 814 of selecting the appropriate line optics modulation. In a preferred embodiment, the choices are optical return-to-zero (RZ), electrical RZ, non-return-to-zero (NRZ) or some other line optics modulation format. These selections allow the correct mix of modules in a customized transceiver card 200. [0072] In FIG. 8 is shown a flow chart of a method for testing and calibrating modular components. At step 910, an interlocking modular transceiver card is provided. The modular transceiver card in the preferred embodiment has two line optics modules 210 and 240, two tributary optics modules 220 and 230, two tributary modules 225 and 235, and a motherboard 250. [0073] At step 920, each of the individual modules is tested for functionality. At 930, each of the individual modules is calibrated and operational data is stored in onboard memory. In the preferred embodiment, each of the modules has a separate EEPROM memory in which the operational data is contained, step 940. At step 950, the modular transceiver modules are assembled into a single transceiver card for insertion in a terminal of a transport system 125. [0074] While this invention has been described in reference to illustrative embodiments, this description is not intended to be construed in a limiting sense. Various modifications and combinations of the illustrative embodiments, as well as other embodiments of the invention, will be apparent to persons skilled in the art upon reference to the description. It is therefore intended that the appended claims encompass any such modifications or embodiments. Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4229831 *Dec 22, 1978Oct 21, 1980Burroughs CorporationDrift compensated fiber optic-receiverUS4535459 *May 26, 1983Aug 13, 1985Rockwell International CorporationSignal detection apparatusUS4636859 *Mar 5, 1985Jan 13, 1987Thomson CsfDidon digital demodulatorUS5224183 *Jul 23, 1992Jun 29, 1993Alcatel Network Systems, Inc.Multiple wavelength division multiplexing signal compensation system and method using sameUS5225922 *Nov 21, 1991Jul 6, 1993At&T Bell LaboratoriesOptical transmission system equalizerUS5299048 *Dec 8, 1992Mar 29, 1994Fujitsu LimitedOptical amplifier and optical communication system provided with the optical amplifierUS5455703 *Oct 27, 1993Oct 3, 1995Litton Systems, Inc.Fiber optic transceiver with integrated couplerUS5559625 *Sep 8, 1993Sep 24, 1996British Telecommunications Public Limited CompanyDistributive communications networkUS5613210 *May 30, 1995Mar 18, 1997U.S. Philips CorporationTelecommunication network for transmitting information to a plurality of stations over a single channelUS5726784 *Mar 29, 1996Mar 10, 1998Ciena Corp.WDM optical communication system with remodulators and diverse optical transmittersUS5737118 *Feb 14, 1996Apr 7, 1998Fujitsu LimitedOptical amplifying apparatusUS5778116 *Jan 23, 1997Jul 7, 1998Tomich; John L.Photonic home area network fiber/power insertion apparatusUS5790285 *May 21, 1996Aug 4, 1998Lucent Technologies Inc.Lightwave communication monitoring systemUS5812290 *Dec 12, 1996Sep 22, 1998Nec CorporationOptical switching unit and control method for sameUS5825949 *Apr 3, 1997Oct 20, 1998International Business Machines CorporationOptical wavelength division multiplexer for coupling to data sources and sinks, wherein at least two data sources and sinks operate with different communication protocolsUS5877881 *Nov 20, 1996Mar 2, 1999Fujitsu Ltd.Optical transmission systemUS5903613 *Jan 21, 1997May 11, 1999Seiko Epson CorporationData reception device, data reception method and electronic equipmentUS5914794 *Dec 31, 1996Jun 22, 1999Mci Communications CorporationMethod of and apparatus for detecting and reporting faults in an all-optical communications systemUS5914799 *Sep 4, 1996Jun 22, 1999Koninklijke Ptt Nederland N.V.Optical networkUS5936753 *Jun 13, 1997Aug 10, 1999Fujitsu LimitedOptical network systemUS5940209 *Mar 18, 1997Aug 17, 1999Lucent Technologies Inc.Interactive optical fiber amplifier, system and methodUS5963350 *Mar 29, 1995Oct 5, 1999British Telecommunications Public Limited CompanyOptical telecommunications networkUS6021245 *Jul 29, 1998Feb 1, 2000Lucent Technologies Inc.Method and optical transmission system for compensating dispersion in optical transmission pathsUS6038062 *Dec 14, 1998Mar 14, 2000Hitachi, Ltd.Optical amplifier, method of controlling the output light from the optical amplifier, optical transmission system and method of controlling an optical transmission pathUS6075634 *Aug 5, 1998Jun 13, 2000Jds Uniphase Corporation, UbpGigabit data rate extended range fiber optic communication system and transponder thereforUS6078414 *Dec 4, 1997Jun 20, 2000Nec CorporationOptical transmitter systemUS6081360 *Mar 20, 1998Jun 27, 2000Fujitsu LimitedMethod and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power levelUS6084694 *Aug 12, 1999Jul 4, 2000Nortel Networks CorporationWDM optical network with passive pass-through at each nodeUS6088152 *Mar 8, 1999Jul 11, 2000Lucent Technologies Inc.Optical amplifier arranged to offset Raman gainUS6108074 *Aug 6, 1997Aug 22, 2000Bloom; CaryOptical switching assembly for testing fiber optic deviceUS6122095 *Aug 29, 1997Sep 19, 2000Lucent Technologies Inc.Wavelength-selective and loss-less optical add/drop multiplexerUS6173094 *Mar 24, 1999Jan 9, 2001Corning IncorporatedOptical-transmission system having a split-gain amplifier and a signal-modifying deviceUS6177985 *Jun 27, 1997Jan 23, 2001Cary BloomApparatus and method for testing optical fiber system componentsUS6198559 *Nov 20, 1998Mar 6, 2001Lucent Technologies, Inc.Automatic delay compensation for generating NRZ signals from RZ signals in communications networksUS6226296 *May 21, 1997May 1, 2001Physical Optics CorporationMetropolitan area network switching system and method of operation thereofUS6229599 *Feb 10, 1998May 8, 2001Cselt - Centro Studi E Laboratori Telecomunicazioni S.P.A.Apparatus for measuring characteristics of an optical fiberUS6236481 *Jun 9, 1999May 22, 2001Astarte Fiber Networks, Inc.Method and apparatus for providing loss equalization and adjustment in a fiber optic networkUS6236499 *Apr 15, 1999May 22, 2001Nortel Networks LimitedHighly scalable modular optical amplifier based subsystemUS6246510 *Apr 28, 1999Jun 12, 2001Marconi Communications, Inc.Light amplification apparatus with automatic monitoring and controlsUS6259553 *Dec 29, 1998Jul 10, 2001Fujitsu LimitedOptical communication system and optical amplifierUS6259554 *Jun 18, 1999Jul 10, 2001Sumitomo Electric Industries, Ltd.Optical amplifier repeater systemUS6259693 *Aug 28, 1997Jul 10, 2001Ascend Communications, Inc.Cell combination to utilize available switch bandwidthUS6259845 *Aug 20, 1998Jul 10, 2001Ciena CorporationDispersion compensating element having an adjustable dispersionUS6272185 *May 4, 1998Aug 7, 2001Nortel Networks LimitedMethod and apparatus for performing data pulse detectionUS6275315 *Jul 2, 1998Aug 14, 2001Samsung Electronics Co., Ltd.Apparatus for compensating for dispersion of optical fiber in an optical lineUS6288811 *Oct 17, 2000Sep 11, 2001Seneca NetworksWDM optical communication system with channels supporting multiple data formatsUS6288813 *Mar 25, 1998Sep 11, 2001The United States Of America As Represented By The Administrator Of The National Aeronautics And Space AdministrationApparatus and method for effecting data transfer between data systemsUS6295281 *May 16, 1997Sep 25, 20013Com CorporationSymmetric flow control for ethernet full duplex buffered repeaterUS6301340 *Aug 20, 1999Oct 9, 2001Adtran, Inc.Mechanism for providing emergency POTS service in event of loss of power to customer premises equipment for ISDN telephone linesUS6307656 *Feb 1, 2001Oct 23, 2001Fujitsu LimitedBi-directional wavelength switching device and wavelength demultiplexing/multiplexing deviceUS6356384 *Apr 11, 2000Mar 12, 2002Xtera Communications Inc.Broadband amplifier and communication systemUS6359729 *Nov 17, 1999Mar 19, 2002Corvis CorporationOptical communication system and component control architectures and methodsUS6388801 *Apr 23, 2001May 14, 2002Fujitsu LimitedOptical amplification apparatus utilizing Raman amplification and controlling method thereofUS6396853 *May 28, 1998May 28, 2002Nortel Networks LimitedProviding data services to telecommunications user terminalsUS6430201 *Dec 21, 1999Aug 6, 2002Sycamore Networks, Inc.Method and apparatus for transporting gigabit ethernet and fiber channel signals in wavelength-division multiplexed systemsUS6519082 *Feb 22, 2002Feb 11, 2003Redc Optical Networks Ltd.Apparatus and method for a self-adjusting Raman amplifierUS6567413 *May 18, 2001May 20, 2003Network Elements, Inc.Optical networking module including protocol processing and unified software controlUS6587236 *Jan 7, 2000Jul 1, 2003Sprint Communications Company L.P.Fiber optic errorless switching systemUS6618176 *Feb 26, 2001Sep 9, 2003Ciena CorporationRemodulating channel selectors for WDM optical communication systemsUS6678527 *Feb 8, 1999Jan 13, 2004Nokia Networks OyMultimedia and multiservice calls in mobile networkUS6775799 *Mar 17, 2000Aug 10, 2004Applied Micro Circuits CorporationProtocol independent performance monitor with selectable FEC encoding and decodingUS6782009 *Mar 17, 2000Aug 24, 2004Applied Micro Circuits CorporationMulti-port data arbitration controlUS6788681 *Feb 25, 2000Sep 7, 2004Nortel Networks LimitedVirtual private networks and methods for their operationUS6895190 *May 26, 2000May 17, 2005Picolight, IncorporatedSwitchable bandwidth lowpass filterUS6904237 *May 21, 2001Jun 7, 2005Siemens AktiengesellschaftCircuit for measurement of the signal quality in digital optical fiber transmission networks by interpreting the signal histogramUS6915036 *Oct 11, 2002Jul 5, 2005Pts CorporationField reconfigurable line cards for an optical transport systemUS6996123 *Apr 11, 2001Feb 7, 2006Terawave Communications, Inc.Adaptive bit rate transponderUS7039067 *Jul 30, 2001May 2, 2006Dorsal Networks, Inc.Methods and systems for hybrid interfaces and architectures for optical communicationsUS7099584 *Jul 31, 2002Aug 29, 2006Raza Microelectronics, Inc.Advanced error correcting optical transport networkUS7099592 *Feb 2, 2001Aug 29, 2006Oyster Optics, Inc.Telecommunications card for secure optical data transmission and installation methodUS7164692 *Feb 4, 2003Jan 16, 2007Jeffrey Lloyd CoxApparatus and method for transmitting 10 Gigabit Ethernet LAN signals over a transport systemUS7167648 *Oct 24, 2001Jan 23, 2007Innovative Fiber Optic Solutions, LlcSystem and method for an ethernet optical area networkUS7209667 *Dec 7, 2001Apr 24, 2007Transmode Systems AbMethods of connecting and testing interfaces for CWDM fiber-optic systemsUS7245633 *Nov 10, 2000Jul 17, 2007Siemens AktiengesellschaftMultiplexing method for gigabit ethernet signals in the synchronous digital hierarchyUS20010005271 *Dec 21, 2000Jun 28, 2001Olivier LeclercDevice for applying time-delays to optical signalsUS20010007605 *Jan 4, 2001Jul 12, 2001Shinya InagakiApparatus and method of compensating for wavelength dispersion of optical transmission lineUS20010009468 *Feb 14, 2001Jul 26, 2001Fee John ArthurMethod and system for compensating for chromatic dispersion in an optical networkUS20010014104 *Dec 19, 2000Aug 16, 2001Bottorff Paul A.10 Gigabit ethernet mappings for a common LAN/WAN PMD interface with a simple universal physical medium dependent interfaceUS20020009060 *May 7, 2001Jan 24, 2002Todd GrossSatellite transceiver card for bandwidth on demand applicationsUS20020012152 *Jul 23, 2001Jan 31, 2002Broadcom CorporationMethods and systems for digitally processing optical data signalsUS20020015220 *Jul 6, 2001Feb 7, 2002Serguei PapernylCascaded pumping system and method for producing distributed raman amplification in optical fiber telecommunication systemsUS20020034197 *Dec 15, 2000Mar 21, 2002Tornetta Anthony G.High speed linking moduleUS20020044317 *Aug 21, 2001Apr 18, 2002Guido GentnerControl method and optical data transmission path for compensating changes in SRS-induced power exchangeUS20020044324 *Dec 19, 2001Apr 18, 2002Fujitsu LimitedOptical communication system, method for supplying pump light, and distributed raman amplifying apparatusUS20020048287 *Dec 20, 2001Apr 25, 2002Silvers John LeroySystem and method of disharmonic frequency multiplexingUS20020051468 *Sep 21, 2001May 2, 2002Yoram OfekTime-based grooming and degrooming methods with common time reference for optical networksUS20020063948 *Jan 22, 2001May 30, 2002Islam Mohammed N.All band amplifierUS20020064181 *Sep 21, 2001May 30, 2002Yoram OfekMulti-terabit SONET switching with common time referenceUS20020075903 *Dec 19, 2000Jun 20, 2002Nortel Networks LimitedMultiplexing SONET /SDH data streams using independent encoding schemesUS20020080809 *Dec 21, 2000Jun 27, 2002James NicholsonSystem and method for multiplexing synchronous digital data streamsUS20020114047 *Nov 16, 2001Aug 22, 2002Jds Uniphase CorporationCascaded RZ and NRZ laser modulators having RZ/NRZ phase alignment bias controlUS20020131115 *Apr 29, 2002Sep 19, 2002The Furukawa Electric Co. Ltd.Wavelength multiplex transmission method and systemUS20020141013 *Oct 19, 2001Oct 3, 2002Naimish PatelIntegrated optical networking transport/switching architectureUS20030002118 *Feb 14, 2001Jan 2, 2003Mehrdad GivehchiMethods and apparatus for locking the phase between clock and data in return-to-zero modulation formatUS20030043432 *Oct 17, 2002Mar 6, 2003Oren MarmurOptical transponderUS20030067655 *Oct 5, 2001Apr 10, 2003Bo PedersenMethods and systems for integrated IP routers and long haul/ultra long haul optical communication transceiversUS20030161351 *Feb 22, 2002Aug 28, 2003Beverly Harlan T.Synchronizing and converting the size of data framesUS20040109465 *May 20, 2003Jun 10, 2004Do Yeon Kim10-Gigabit ethernet line interface apparatus and method of controlling the sameUS20060002419 *Feb 25, 2005Jan 5, 2006Cox Jeffrey LApparatus and method for transmitting 10 Gigabit Ethernet LAN signals over a transport system* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7272274 *Mar 30, 2006Sep 18, 2007Intel CorporationModule to couple to an electrical and an optical backplane in a chassisUS7350986Dec 28, 2005Apr 1, 2008Finisar CorporationMicrocode-driven programmable receive power levels in an optical transceiverUS7360954 *Mar 25, 2004Apr 22, 2008Cisco Technology, Inc.Low speed data path for SFP-MSA interfaceUS7493048Jun 30, 2004Feb 17, 2009Finisar CorporationTransceiver with persistent logging mechanismUS7509050 *Jun 30, 2004Mar 24, 2009Finisar CorporationMicrocode-driven self-calibration of optical transceivers to environmental conditionsUS7567758 *Jul 28, 2003Jul 28, 2009Finisar CorporationTransceiver module and integrated circuit with multi-rate eye openers and bypassUS7580637Oct 13, 2006Aug 25, 2009Menara Networks, Inc.Systems and methods for the integration of framing, OAM and P, and forward error correction in pluggable optical transceiver devicesUS7609973 *Aug 13, 2004Oct 27, 2009Avago Technologies Fiber Ip (Singapore) Pte. Ltd.Electro-optical communication systemUS7653314Aug 29, 2006Jan 26, 2010Finisar CorporationOptical transceiver with custom logging mechanismUS7664401Jul 3, 2004Feb 16, 2010Finisar CorporationApparatus, system and methods for modifying operating characteristics of optoelectronic devicesUS7720387Jun 30, 2004May 18, 2010Finisar CorporationMicrocode-driven calculation of temperature-dependent operational parameters in an optical transmitter/receiverUS7809275Mar 7, 2005Oct 5, 2010Finisar CorporationXFP transceiver with 8.5G CDR bypassUS7835648Oct 13, 2008Nov 16, 2010Finisar CorporationAutomatic selection of data rate for optoelectronic devicesUS7856183 *May 27, 2005Dec 21, 2010Adva Ag Optical NetworkingCircuit for transmitting signals in a network node, particularly for a channel card for an optical wavelength division multiplex (WDM) signal trasmitting deviceUS7881615Jul 26, 2007Feb 1, 2011Finisar CorporationDynamic digital diagnostic alertsUS7881616Oct 27, 2005Feb 1, 2011Finisar CorporationTransceiver based loop back initiationUS7977822 *Nov 5, 2007Jul 12, 2011Arm LimitedDynamically changing control of sequenced power gatingUS7995927Nov 2, 2009Aug 9, 2011Finisar CorporationTransceiver module and integrated circuit with dual eye openersUS8064773 *Mar 13, 2008Nov 22, 2011Emcore CorporationMulti-channel optical communicationUS8068739Jun 11, 2004Nov 29, 2011Finisar CorporationModular optical device that interfaces with an external controllerUS8107820May 13, 2008Jan 31, 2012Menara Networks, Inc.Systems and methods for the integration of framing, OAM&P, and forward error correction in SFP optical transceiver devicesUS8107821 *May 13, 2008Jan 31, 2012Menara Networks, Inc.Systems and methods for Ethernet extension and demarcationUS8412051Feb 11, 2011Apr 2, 2013Menara Networks, Inc.40G/100G optical transceivers with integrated framing and forward error correctionUS8428461 *Jul 12, 2007Apr 23, 2013Tellabs Operations, Inc.Apparatus for managing an optical signalUS8582978Jan 16, 2008Nov 12, 2013Finisar CorporationLogging mechanism for an intelligent transmitter moduleUS8583395Jul 23, 2007Nov 12, 2013Finisar CorporationSelf-testing optical transceiverUS8705973Sep 7, 2005Apr 22, 2014Finisar CorporationOptical transceiver with off-transceiver logging mechanismUS8711888Dec 30, 2005Apr 29, 2014Remec Broadband Wireless LlcDigital microwave radio link with adaptive data rateUS8731007 *Jan 8, 2010May 20, 2014Remec Broadband Wireless, LlcDigital microwave radio link with a variety of portsUS8879926 *Feb 28, 2012Nov 4, 2014Smsc Holdings S.A.R.L.Communicating between an optical receiver and an optical transmitter using a serial busUS8891970Apr 29, 2005Nov 18, 2014Finisar CorporationModular optical device with mixed signal interfaceUS8923704Aug 30, 2004Dec 30, 2014Finisar CorporationComputer system with modular optical devicesUS8929744Mar 5, 2013Jan 6, 2015Menara Networks, Inc.40G/100G MSA-compliant optical transceivers with advanced functionalityUS9014562Mar 5, 2008Apr 21, 2015Coriant Operations, Inc.Optical line terminal arrangement, apparatus and methodsUS9059866Jul 9, 2007Jun 16, 2015Remec Broadband Wireless Holdings, Inc.Digital microwave radio system and method with encryptionUS9065571 *Aug 30, 2004Jun 23, 2015Finisar CorporationModular controller that interfaces with modular optical deviceUS9071349Jan 29, 2013Jun 30, 2015Menara Networks, Inc.Optical transceiver performance monitoring and alarming systems and methodsUS9071361Nov 4, 2013Jun 30, 2015Menara Networks, Inc.Extended reach XFP transceiver with integrated forward error correctionUS9071364 *Oct 18, 2012Jun 30, 2015Clariphy Communications, Inc.Coherent optical transceiver with programmable application modesUS9276690 *Apr 6, 2010Mar 1, 2016Zte CorporationDistributed electrical cross device, and system and method thereof for implementing sub-network connection (SNC) cascade protectionUS9312951Jan 29, 2013Apr 12, 2016Menara Networks, Inc.Virtualized optical transport network systems and methodsUS9319143Jan 5, 2015Apr 19, 2016Menara Networks, Inc.40G/100G/200G/400G pluggable optical transceivers with advanced functionalityUS9467227 *Mar 13, 2015Oct 11, 2016Luxtera, Inc.Method and system for an optical connection service interfaceUS9496960Sep 15, 2015Nov 15, 2016Menara Networks, Inc.Pluggable optical transceivers with integrated electronic dispersion compensationUS9615151Feb 10, 2016Apr 4, 2017Menara Networks, Inc.Virtualized optical transport network systems and methodsUS20040071389 *Jul 25, 2003Apr 15, 2004Hofmeister Rudolf J.Optical and electrical channel feedback in optical transceiver moduleUS20040076113 *Jul 28, 2003Apr 22, 2004Aronson Lewis B.Transceiver module and integrated circuit with multi-rate eye openers and bypassUS20040076119 *Jul 28, 2003Apr 22, 2004Aronson Lewis B.Transceiver module and integrated circuit with dual eye openers and integrated loopback and bit error rate testingUS20040091028 *Jul 28, 2003May 13, 2004Aronson Lewis B.Transceiver module and integrated circuit with dual eye openers and equalizerUS20050025502 *Jun 11, 2004Feb 3, 2005FinisarModular optical device that interfaces with an external controllerUS20050047778 *Aug 30, 2004Mar 3, 2005FinisarModular controller that interfaces with modular optical deviceUS20050050250 *Aug 30, 2004Mar 3, 2005FinisarComputer system with modular optical devicesUS20050060114 *Aug 30, 2004Mar 17, 2005FinisarTesting and storing tuning information in modular optical devicesUS20050063711 *Aug 13, 2004Mar 24, 2005Agilent Technologies, Inc.Electro-optical communication systemUS20050111845 *Jul 3, 2004May 26, 2005Stephen NelsonApparatus, system and methods for modifying operating characteristics of optoelectronic devicesUS20050191053 *Apr 29, 2005Sep 1, 2005Finisar CorporationModular optical device with mixed signal interfaceUS20050281193 *Apr 29, 2005Dec 22, 2005Hofmeister Rudolf JTransceiver module and integrated circuit with clock and data recovery clock diplexingUS20060002707 *Jun 30, 2004Jan 5, 2006Ekkizogloy Luke MMicrocode-driven self-calibration of optical transceiver to environmental conditionsUS20060002708 *Jun 30, 2004Jan 5, 2006Hahin Jayne CMicrocode-driven calculation of temperature-dependent operational parameters in an optical transmitter/receiverUS20060002709 *Jun 30, 2004Jan 5, 2006Dybsetter Gerald LTransceiver with persistent logging mechanismUS20060051099 *Sep 7, 2005Mar 9, 2006Ekkisogloy Luke MOptical transceiver with off-transceiver logging mechanismUS20060093372 *Oct 27, 2005May 4, 2006Hahin Jayne CTransceiver based loop back initiationUS20060147162 *Dec 28, 2005Jul 6, 2006Ekkizogloy Luke MMicrocode-driven programmable receive power levels in an optical transceiverUS20070065151 *Aug 29, 2006Mar 22, 2007Dybsetter Gerald LOptical transceiver with custom logging mechanismUS20070230862 *Mar 30, 2006Oct 4, 2007Albers Robert JModule to couple to an electrical and an optical backplane in a chassisUS20080008474 *Jul 12, 2007Jan 10, 2008Tellabs Operations, Inc.Apparatus for managing an optical signalUS20080089693 *Oct 13, 2006Apr 17, 2008Menara Networks, Inc.Systems and methods for the integration of framing, OAM&P, and forward error correction in pluggable optical transceiver devicesUS20080219666 *Mar 5, 2008Sep 11, 2008Tellabs Operations, Inc.Optical line terminal arrangement, apparatus and methodsUS20080247755 *May 27, 2005Oct 9, 2008Henning HinderthurCircuit for Transmitting Signals in a Network Node, Particularly for a Channel Card for an Optical Wavelength Division Multiplex (Wdm) Signal Trasmitting DeviceUS20080267314 *Jul 9, 2007Oct 30, 2008Idan Bar-SadeDigital microwave radio system and method with encryptionUS20090028551 *Jul 26, 2007Jan 29, 2009Finisar CorporationDynamic digital diagnostic alertsUS20090028574 *Jul 23, 2007Jan 29, 2009Gerald L. DybsetterSelf-testing optical transceiverUS20090103926 *May 13, 2008Apr 23, 2009Menara Networks, Inc..Systems and methods for the integration of framing, oam&p, and forward error correction in sfp optical transceiver devicesUS20090115256 *Nov 5, 2007May 7, 2009Arm LimitedDynamically changing control of sequenced power gatingUS20090182531 *Jan 16, 2008Jul 16, 2009Finisar CorporationLogging mechanism for an intelligent transmitter moduleUS20090232505 *Mar 13, 2008Sep 17, 2009Emcore CorporationMulti-Channel Optical CommunicationUS20090317073 *May 13, 2008Dec 24, 2009Menara Networks, Inc.Systems and methods for ethernet extension and demarcationUS20110081872 *Jan 8, 2010Apr 7, 2011Bridgewave Communications, Inc.Digital Microwave Radio Link with a Variety of PortsUS20110135312 *Feb 11, 2011Jun 9, 2011Siraj Nour El-Ahmadi40g/100g optical transceivers with integrated framing and forward error correctionUS20120163796 *Apr 6, 2010Jun 28, 2012Zte CorporationDistributed electrical cross device, and system and method thereof for implementing sub-network connection (snc) cascade protectionUS20130071125 *Feb 28, 2012Mar 21, 2013Tony SusantoCommunicating Between an Optical Receiver and an Optical Transmitter Using a Serial BusUS20130202289 *Feb 7, 2012Aug 8, 2013Cisco Technology, Inc.Method and device for providing on-board failure logging for pluggable optical modulesUS20150288477 *Jun 17, 2015Oct 8, 2015Huawei Technologies Co., Ltd.Line Card, Optical Module, and Optical Network DeviceWO2008048372A3 *Apr 10, 2007Jun 26, 2008Gabriel E CardonaSystems and methods for the integration of framing oam&p, and forward error correction in pluggable optical transceiver devices* Cited by examinerClassifications U.S. Classification398/135International ClassificationH04B10/00Cooperative ClassificationY10S370/907, H04B10/801European ClassificationH04B10/801Legal EventsDateCodeEventDescriptionOct 6, 2003ASAssignmentOwner name: CELION NETWORKS, INC., TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHETH, SAMIR;YOUNG, MARVIN R.;COX, JEFFREY LLOYD;AND OTHERS;REEL/FRAME:014576/0141Effective date: 20030715Owner name: CELION NETWORKS, INC.,TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHETH, SAMIR;YOUNG, MARVIN R.;COX, JEFFREY LLOYD;AND OTHERS;REEL/FRAME:014576/0141Effective date: 20030715Aug 22, 2005ASAssignmentOwner name: CELION NETWORKS, INC., TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHETH, SAMIR SATISH;YOUNG, MARVIN R.;COX, JEFFREY LLOYD;AND OTHERS;REEL/FRAME:016431/0470;SIGNING DATES FROM 20030611 TO 20030715Owner name: CELION NETWORKS, INC.,TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHETH, SAMIR SATISH;YOUNG, MARVIN R.;COX, JEFFREY LLOYD;AND OTHERS;SIGNING DATES FROM 20030611 TO 20030715;REEL/FRAME:016431/0470Aug 25, 2005ASAssignmentOwner name: PIVOTAL DECISIONS LLC, NEVADAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DOWLING CONSULTING, INC.;REEL/FRAME:016446/0418Effective date: 20050629Owner name: DOWLING CONSULTING, INC., FLORIDAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CELION NETWORKS, INC.;REEL/FRAME:016446/0411Effective date: 20050629Owner name: CELION NETWORKS, INC., TEXASFree format text: CORRECTED RECORDATION FORM COVER SHEET TO CORRECT THE APPLICATION NUMBER FROM 10456774 TO 10455774,ALSO THE EXECUTION DATES FOR THE INVENTORS AND THE ASSIGNEE ADDRESS. PREVIOUSLY RECORDED AT REEL/FRAME 014576/0141 (ASSIGNMENT OF ASSIGNOR S INTEREST);ASSIGNORS:SHETH, SAMIR SATISH;YOUNG, MARVIN R.;COX, JEFFREY LLOYD;AND OTHERS;REEL/FRAME:016925/0600;SIGNING DATES FROM 20030611 TO 20050613Owner name: DOWLING CONSULTING, INC.,FLORIDAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CELION NETWORKS, INC.;REEL/FRAME:016446/0411Effective date: 20050629Owner name: PIVOTAL DECISIONS LLC,NEVADAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DOWLING CONSULTING, INC.;REEL/FRAME:016446/0418Effective date: 20050629Owner name: CELION NETWORKS, INC.,TEXASFree format text: CORRECTED RECORDATION FORM COVER SHEET TO CORRECT THE APPLICATION NUMBER FROM 10456774 TO 10455774,ALSO THE EXECUTION DATES FOR THE INVENTORS AND THE ASSIGNEE ADDRESS. PREVIOUSLY RECORDED AT REEL/FRAME 014576/0141 (ASSIGNMENT OF ASSIGNOR S INTEREST);ASSIGNORS:SHETH, SAMIR SATISH;YOUNG, MARVIN R.;COX, JEFFREY LLOYD;AND OTHERS;SIGNING DATES FROM 20030611 TO 20050613;REEL/FRAME:016925/0600May 31, 2011CCCertificate of correctionJan 10, 2014REMIMaintenance fee reminder mailedJun 1, 2014LAPSLapse for failure to pay maintenance feesJul 22, 2014FPExpired due to failure to pay maintenance feeEffective date: 20140601RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services

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The people at the desk were awful to deal withl... - Review of Travelodge Airport Platte City - TripAdvisor
The people at the desk were awful to deal withl... - Review of Travelodge Airport Platte City
After looking at the website we booked a room for our family for 2 nights here. The website pictures are very missleading! We got in late at night and when we opened the door the heat coming out of the room was awful and it was a hot summer day. We called desk and told them so they showed us another room equally as disgusting so we stayed put in our other room! After the air conditioning ran for 3 hrs. straight the room was still not cool. There was a pathetic fan sitting in front of the air conditioner so they obviously knew there was a problem. It was too late to go on elsewhere. It was a disgusting room! Floor was sticky, bathroom was gross, tub had a crack in it that had been patched but was still cracked. Was the most disgusting room I've ever been in. The people at the desk were awful to deal withl They would not budge on cost of room the next morning. Of course, they got our money for 1 night and we were out of there to a wonderful hotel down the road south a couple miles for less money for the 2nd night.
Ask KanawhaTraveler about Travelodge Airport Platte City
4 Thank KanawhaTraveler
Very rude treatment; unreasonable cancellation policy
I am accustomed to staying at Comfort Inn in Platte City to use their park and fly package. Recently I accidently called Travelodge and reserved their package. I was NOT told of 24 hour cancellation policy, which is far outside local custom. I discovered my mistake when I arrived at Comfort Inn to check in. I and the desk clerk made phone calls to Travelodge asking for a courtesy cancellation. Travelodge was rude and immoveable. I called the national Travelodge organization. They have NO control over their motels; they are privately owned. This is my second bad experience with Travelodges this summer, and I'll not ever stay at another one.
Ask June N about Travelodge Airport Platte City
ValDenverCO
Bad choice, misleading website
Unfortunately we got there too late and our kids were too tired for us to look for alternatives. Dirty carpet, mold on the shower curtain, threadbare towels, badly managed. BEWARE!!
Ask ValDenverCO about Travelodge Airport Platte City
3 Thank ValDenverCO
Spend A Few Extra Dollars...Find Another Motel!
To be honest with you we never got to the room. The lobby was dirty and foul smelling. The pool was extremely cloudy and unsanitary looking (unlike the picture in the advertisement). The desk clerk was rude. We just sucked up the loss and went to another motel.
Ask Dorothy C about Travelodge Airport Platte City
Not a place if cleanliness is a priority
We stayed at the Travelodge because we had a very early morning flight. This motel was very cheap ($64.99) which included an indoor pool, coffee maker in room, free continental breakfast, free shuttle to/from airport 24 hours a day, and free parking while we were gone. The prices are not firm and you can "haggle" for a lower price. Generally the motel felt safe for female travellers.
The room was old with mismatched and clashing furniture. There was no unpleasant smell in the room. The upholstered chair was scary it looked so dirty. The bed and sheets looked very clean. I set a book down on the table next to the bed. When I tried to pick it up it stuck to the table (there was something dried and sticky all over the table). Both my friend and I made the mistake of going barefoot in the room. The carpet had a really grimy feel to it. The indoor pool had a strange cloudiness to it and was not used by any guest. It was hard to find any good restaurants anywhere close by the motel.
Ask girrlstravel about Travelodge Airport Platte City
5 Thank girrlstravel
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Additional Information about Travelodge Airport Platte City
Address: 504 Prairie View Rd, I-29 Exit 19 Prairie View Rd, Platte City, MO 64079-8355
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House Prices in Woolley, Wakefield, West Yorkshire
11, The Courtyard, Woolley, Wakefield, West Yorkshire WF4 2LY
£262,500 Semi-Detached, Freehold, Residential 15 Dec 2017 3 bedrooms
£285,000 Semi-Detached, Freehold, Residential 02 Jun 2006
£200,000 Semi-Detached, Freehold, Residential 06 Sep 2002
£97,050 Semi-Detached, Freehold, Residential 14 Aug 1998
Woodroyd, Seckar Lane, Woolley, Wakefield, West Yorkshire WF4 2LE
£550,000 Detached, Freehold, Residential 16 Oct 2017
3, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£390,000 Semi-Detached, Freehold, Residential 18 Aug 2017 3 bedrooms
£357,000 Semi-Detached, Freehold, Residential 15 Jun 2007
£290,000 Semi-Detached, Freehold, Residential 13 Nov 2003
4, The Courtyard, Woolley, Wakefield, West Yorkshire WF4 2LY
£265,000 Terraced, Freehold, Residential 11 Jul 2017 3 bedrooms
7, The Courtyard, Woolley, Wakefield, West Yorkshire WF4 2LY
£205,000 Flat, Freehold, Residential 23 Jun 2017 3 bedrooms
£200,000 Flat, Freehold, Residential 09 Dec 2016
£220,000 Flat, Freehold, Residential 12 Mar 2010
£130,000 Flat, Freehold, Residential 06 Aug 2001
£97,000 Flat, Freehold, Residential 19 Jun 1998
Tithe Cottage, Stoney Lane, Woolley, Wakefield, West Yorkshire WF4 2LH
£226,000 Detached, Freehold, Residential 24 May 2017 2 bedrooms
£215,000 Detached, Freehold, Residential 04 Jun 2015
£210,000 Detached, Freehold, Residential 12 Nov 2012
£240,000 Detached, Freehold, Residential 16 Mar 2007
£207,500 Detached, Freehold, Residential 30 Jan 2004
£95,000 Detached, Freehold, Residential 18 Feb 2002
21, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£660,000 Detached, Freehold, Residential 26 Apr 2017 4 bedrooms
£675,000 Detached, Freehold, Residential 03 Nov 2015
£438,500 Detached, Freehold, Residential 25 Oct 2013
£462,500 Detached, Freehold, Residential 15 Jun 2007
7, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£145,000 Terraced, Freehold, Residential 29 Jan 1999
20, Seckar Lane, Woolley, Wakefield, West Yorkshire WF4 2LE
£510,000 Detached, Freehold, Residential 26 Oct 2016 5 bedrooms
£155,000 Detached, Freehold, Residential 23 Dec 1998
26, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£715,000 Detached, Freehold, Residential 29 Jul 2016 4 bedrooms
9, Finkle Street, Woolley, Wakefield, West Yorkshire WF4 2LA
£610,000 Detached, Freehold, Residential 29 Jul 2016 5 bedrooms
£350,000 Detached, Freehold, Residential 28 Jan 2005
35, Low Moor Lane, Woolley, Wakefield, West Yorkshire WF4 2LJ
£149,000 Terraced, Freehold, Residential 08 Jul 2016 3 bedrooms
£118,000 Terraced, Freehold, Residential 21 Oct 2008
£116,000 Terraced, Freehold, Residential 03 Aug 2006
2, Seckar Lane, Woolley, Wakefield, West Yorkshire WF4 2LE
£380,000 Detached, Freehold, Residential 29 Apr 2016 3 bedrooms
16, High Street, Woolley, Wakefield, West Yorkshire WF4 2JZ
£199,000 Semi-Detached, Freehold, Residential 09 Dec 2015 3 bedrooms
£124,950 Semi-Detached, Freehold, Residential 06 Jul 2012
6, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£240,000 Terraced, Freehold, Residential 26 Nov 2015 3 bedrooms
£146,000 Terraced, Freehold, Residential 19 Apr 2002
£98,000 Terraced, Freehold, Residential 27 Feb 1998
Ashgrove House, 3, Woolley Hall Gardens, Woolley, Wakefield, West Yorkshire WF4 2TA
£715,000 Detached, Freehold, Residential 24 Sep 2015
5, The Paddock, Woolley, Wakefield, West Yorkshire WF4 2LZ
£665,000 Detached, Freehold, Residential 27 Jul 2015 4 bedrooms
£322,500 Detached, Freehold, Residential 21 Jun 2010
Orchard House, New Road, Woolley, Wakefield, West Yorkshire WF4 2JH
£745,000 Detached, Freehold, Residential 19 Feb 2015 4 bedrooms
£325,000 Detached, Freehold, Residential 02 Aug 2001
4, Finkle Close, Woolley, Wakefield, West Yorkshire WF4 2LU
£350,000 Detached, Freehold, Residential 30 Oct 2014
10, Seckar Lane, Woolley, Wakefield, West Yorkshire WF4 2LE
£825,000 Detached, Freehold, Residential 15 Aug 2014 6 bedrooms
£285,000 Detached, Freehold, Residential 28 Aug 1998
31, Low Moor Lane, Woolley, Wakefield, West Yorkshire WF4 2LJ
£500,000 Detached, Freehold, Residential 04 Aug 2014 3 bedrooms
25, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£612,500 Detached, Freehold, Residential 25 Jul 2014 4 bedrooms
2, The Courtyard, Woolley, Wakefield, West Yorkshire WF4 2LY
£180,000 Terraced, Freehold, Residential 18 Jun 2014 3 bedrooms
£120,000 Terraced, Freehold, Residential 08 Dec 2000
£90,000 Terraced, Freehold, Residential 30 Jun 1998
16, Old Mount Farm, Woolley, Wakefield, West Yorkshire WF4 2LD
£229,950 Detached, Freehold, Residential 02 May 2014 2 bedrooms
£100,000 Detached, Freehold, Residential 26 Apr 1996
Cotswold, Molly Hurst Lane, Woolley, Wakefield, West Yorkshire WF4 2JY
£400,000 Detached, Freehold, Residential 23 Apr 2014 4 bedrooms
Most of the sales in Woolley over the past year were terraced properties which on average sold for £327,500. Detached properties had an average sold price of £388,000 and semi-detached properties averaged at £262,500.
Woolley, with an overall average price of £316,417 was more expensive than nearby Sandal (£253,363) and Walton (£225,086), but was cheaper than Newmillerdam (£341,714).
In the past year house prices in Woolley were 28% down on the year before and 55% down on 2011 when they averaged at £703,000.
Properties for sale in Woolley
Properties to let in Woolley
House prices near Woolley, Wakefield, West Yorkshire
Houses prices in Darton
Houses prices in Crigglestone

value: This website is a UK-based company that runs rightmove.co.uk, the UK's largest online real estate portal and property website. It is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.


text:
Patent US20090113071 - Methods and Systems for Providing Efficient Provisioning of Data Flows - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA system and method may include receiving a new flow request, the new flow request for requesting provisioning of a flow between a computer and the server, identifying a path of one or more network elements between the computer and the server, and determining whether provisioning the flow between the...http://www.google.com/patents/US20090113071?utm_source=gb-gplus-sharePatent US20090113071 - Methods and Systems for Providing Efficient Provisioning of Data FlowsAdvanced Patent SearchPublication numberUS20090113071 A1Publication typeApplicationApplication numberUS 11/925,246Publication dateApr 30, 2009Filing dateOct 26, 2007Priority dateOct 26, 2007Also published asCN101836196A, CN101836196B, EP2220568A1, EP2220568A4, EP2220568B1, US7836201, WO2009055777A1Publication number11925246, 925246, US 2009/0113071 A1, US 2009/113071 A1, US 20090113071 A1, US 20090113071A1, US 2009113071 A1, US 2009113071A1, US-A1-20090113071, US-A1-2009113071, US2009/0113071A1, US2009/113071A1, US20090113071 A1, US20090113071A1, US2009113071 A1, US2009113071A1InventorsScott R. Kotrla, Christopher N. Del Regno, Matthew W. Turlington, Michael U. Bencheck, Richard C. SchellOriginal AssigneeVerizon Services Organizaton Inc., Verizon Business Network Services Inc.Export CitationBiBTeX, EndNote, RefManReferenced by (3), Classifications (16), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMethods and Systems for Providing Efficient Provisioning of Data FlowsUS 20090113071 A1Abstract A system and method may include receiving a new flow request, the new flow request for requesting provisioning of a flow between a computer and the server, identifying a path of one or more network elements between the computer and the server, and determining whether provisioning the flow between the computer and the server violates a constraint. The system and method may further include updating an oversubscription factor and available bandwidth for an interface of each of the one or more network elements in the event the constraint is not violated, and determining whether a second path exists between the computer and the server in the event the constraint is violated.
receiving a new flow request, the new flow request for requesting provisioning of a flow between a computer and a server; identifying a path of one or more network elements between the computer and the server, each of the one or more network elements comprising an interface; determining whether provisioning the flow between the computer and the server violates a constraint; and in the event the constraint is not violated, updating an oversubscription factor and available bandwidth for the interface of each of the one or more network elements in the path; and in the event the constraint is violated, determining whether a second path exists between the computer and the server. 2. The method of claim 1, wherein the constraint is based on an interface rate of at least one of the interfaces.
∑ i = 0 n   L   F i x + ∑ m = 0 p   S   F m z ≤ L . 13. The method of claim 1, wherein the oversubscription factor is
n = ∑ i = 0 n   L   F i + ∑ m = 0 p   S   F m L . 14. The method of claim 1, wherein the path is identified using a routing protocol.
16. A computer readable media comprising code to perform the acts of the method of claim 1.
receiving a new flow request at a first network element from a second network element, the new flow request being usable to request provisioning of a new flow across an interface of the first network element; determining whether provisioning the new flow violates a constraint; and in the event the constraint is not violated, updating an oversubscription factor and bandwidth of the interface, communicating an acceptance message to the second network element, and communicating the new flow request to a third network element; and in the event the constraint is violated, communicating a deny new flow message to the second network element. 18. The method of claim 17, wherein the first network element updates bandwidth information in a traffic database if the constraint is not violated.
a provisioning server communicatively coupled to a network; a computer communicatively coupled to the network; a communication server communicatively coupled to the network; and a network element communicatively coupled to the network and comprising an interface, wherein the provisioning server:
identifies a path including the network element between the computer and the communication server, and
determines whether provisioning the flow between the computer and the server violates a constraint; and
in the event the constraint is not violated, the provisioning server updates an oversubscription factor and available bandwidth for the interface; and in the event the constraint is violated, the provisioning server determines whether a second path exists between the computer and the communication server. 21. A system comprising:
a provisioning server communicatively coupled to a network; a computer communicatively coupled to the network; a communication server communicatively coupled to the network; a first endpoint network element communicatively coupled to the network and comprising an interface; and an intermediate network element communicatively coupled to the network, wherein the provisioning server receives a new flow request and communicates the new flow request to the first endpoint network element, the new flow request for requesting provisioning of a new flow between the computer and the communication server, and wherein the first endpoint network element determines whether provisioning the flow violates a constraint; and in the event the constraint is not violated, the first endpoint network element updates an oversubscription factor and available bandwidth of the interface, and communicates the new flow request to the intermediate network element; and in the event the constraint is violated, the first endpoint network element communicates a deny new flow message to the provisioning server. Description
BACKGROUND INFORMATION Traffic engineers monitor data throughput across network devices, such as routers and switches. In many instances, the network devices may be oversubscribed in an attempt to improve data throughput. Oversubscribing may refer to the situation where a network provider sells more bandwidth to customers than the network devices can provide based on the low likelihood that all of the customers will be using all of their purchased bandwidth at the same time. In conventional systems, an oversubscription factor is statically assigned to each interface on a network device based on the experience of a traffic engineer. For example, an interface of a 4network device may be set to a bandwidth of one gigabit per second (1 Gbps) with an oversubscription factor of 2:1 allowing for up to 2 Gbps of bandwidth to be provisioned across the interface.
n = ∑ i = 0 n   LF i + ∑ m = 0 p   SF m L , where
∑ i = 0 n   LF i x +  ∑ m = 0 p   SF m z ≤ L . Thus, as
∑ i = 0 n   L   F i x  L , then   ∑ m = 0 p   S   F m z  0. In that situation, then
n  ∑ i = 0 n   L   F i + ∑ m = 0 p   S   F m L = x , which is the large flow oversubscription factor.
∑ m = 0 p   S   F m z  L , then   ∑ i = 0 n   L   F i x  0. In that situation, then
n  ∑ i = 0 n   L   F i + ∑ m = 0 p   S   F m L = z , which is the small flow oversubscription factor. If it is assumed that the large flow oversubscription factor x is smaller than the small flow oversubscription factor z, then x≦n≦z.
500   Mbps x + ∑ m = 0 p   S   F m z ≤ L Solving for
∑ m = 0 p   S   F m provides:
∑ m = 0 p   S   F m ≤ z  ( L - 500   Mbps x ) ≤ 2  ( 1000   Mbps - 500   Mbps 1 ) ≤ 1000   Mbps Thus, the sum of all the small flow rates may be less than 1000 Mbps to satisfy the Constraint equation. Accordingly, the maximum oversubscription factor for the interface of the network element is:
n max = ∑ i = 0 n   L   F i + ∑ m = 0 p   S   F m L = 500   Mbps + 1000   Mbps 1000   Mbps = 1.5 If, for example, the sum the small flows SF is 400 Mbps, then an additional 600 Mbps of bandwidth may be allocated to other small flows (i.e., 1000 Mbps−400 Mbps=600 Mbps).
∑ i = 0 n   L   F i x + ∑ m = 0 p   S   F m z would be greater than L. In this example, the rate a defining the boundary between large and small flows is the flow having the largest flow rate. Hence,
∑ i = 0 n   L   F i would increase from 500 Mbps to 600 Mbps and the 500 Mbps would be considered a small flow. Then:
∑ m = 0 p   S   F m = 400   Mbps + 500   Mbps = 900   Mbps Considering the Constraint equation:
∑ i = 0 n   L   F i x + ∑ m = 0 p   S   F m z = 600 1 + 900 2 = 1050   Mbps This result is larger than the 1000 Mbps rate of the interface of the network element 108, and hence the new flow request to add a 600 Mbps flow violates the Constraint equation. Thus, the new flow request would be denied.
∑ i = 0 n   L   F i x  L , then   n  ∑ i = 0 n   L   F i + ∑ m = 0 p   S   F m L = x , which is the large flow oversubscription factor. Thus, if x=1 and three separate one gigabit per second flows may be provisioned to one of the three links 112 having a one gigabit per second rate from FIG. 4, the Constraint equation would prevent more than one of the three separate one gigabit per second flows from being provisioned on one of the three one gigabit per second rate links 112. Accordingly, using the Constraint equation to provision flows may improve utilization of the links 112 in a link aggregation environment, and may reduce the potential for latency and/or data loss.
Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8599690 *Oct 26, 2010Dec 3, 2013Electronics And Telecommunications Research InstituteMethod and apparatus for fairly allocating resource to network usersUS20110134754 *Oct 26, 2010Jun 9, 2011Electronics And Telecommunications Research InstituteMethod and apparatus for fairly allocating resource to network usersUS20110158248 *Dec 24, 2009Jun 30, 2011Juniper Networks, Inc.Dynamic prioritized fair share scheduling scheme in over-subscribed port scenario* Cited by examinerClassifications U.S. Classification709/242International ClassificationG06F15/173Cooperative ClassificationH04L41/0896, H04L12/5695, H04L41/5054, H04L47/765, H04L47/745, H04L41/5077, H04L47/822European ClassificationH04L12/56R, H04L41/50L, H04L47/74C, H04L47/76B, H04L47/82B, H04L41/08G, H04L41/50G4Legal EventsDateCodeEventDescriptionApr 16, 2014FPAYFee paymentYear of fee payment: 4Sep 18, 2009ASAssignmentOwner name: VERIZON PATENT AND LICENSING INC., NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON BUSINESS NETWORK SERVICES INC.;REEL/FRAME:023250/0710Effective date: 20090801Owner name: VERIZON PATENT AND LICENSING INC.,NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON BUSINESS NETWORK SERVICES INC.;US-ASSIGNMENT DATABASE UPDATED:20100204;REEL/FRAME:23250/710Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON BUSINESS NETWORK SERVICES INC.;US-ASSIGNMENT DATABASE UPDATED:20100218;REEL/FRAME:23250/710Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON BUSINESS NETWORK SERVICES INC.;US-ASSIGNMENT DATABASE UPDATED:20100304;REEL/FRAME:23250/710Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON BUSINESS NETWORK SERVICES INC.;REEL/FRAME:23250/710Sep 15, 2009ASAssignmentOwner name: VERIZON PATENT AND LICENSING INC., NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON SERVICES ORGANIZATION INC.;REEL/FRAME:023235/0374Effective date: 20090801Owner name: VERIZON PATENT AND LICENSING INC.,NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON SERVICES ORGANIZATION INC.;US-ASSIGNMENT DATABASEUPDATED:20100309;REEL/FRAME:23235/374Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON SERVICES ORGANIZATION INC.;US-ASSIGNMENT DATABASEUPDATED:20100304;REEL/FRAME:23235/374Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON SERVICES ORGANIZATION INC.;US-ASSIGNMENT DATABASEUPDATED:20100525;REEL/FRAME:23235/374Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERIZON SERVICES ORGANIZATION INC.;REEL/FRAME:23235/374Oct 26, 2007ASAssignmentOwner name: VERIZON BUSINESS NETWORK SERVICES INC., VIRGINIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHELL, RICHARD C.;REEL/FRAME:020022/0938Effective date: 20071024Owner name: VERIZON SERVICES ORGANIZATION INC., TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOTRLA, SCOTT R.;DEL REGNO, CHRISTOPHER N.;TURLINGTON, MATTHEW W.;AND OTHERS;REEL/FRAME:020022/0906;SIGNING DATES FROM 20071018 TO 20071024Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOTRLA, SCOTT R.;DEL REGNO, CHRISTOPHER N.;TURLINGTON, MATTHEW W.;AND OTHERS;SIGNING DATES FROM 20071018 TO 20071024;REEL/FRAME:020022/0906RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services