The present invention relates to a method and system for re-routing a call which has been routed from a calling party (1) through a communication network to a destination (4). A need to relay the call to another destination (5) is identified and a subscriber identification of the calling party (1) is signaled from the other destination back to the communication network using a call drop-back function. Preferably, the subscriber information is then used to derive a routing information of the other destination (5) which may be a right destination in case the initial destination (4) was a wrong destination. Thus, a call drop-back feature is used to route calls even in cases where a subscriber is connected to a wrong destination. Thereby, an effective re-routing can be provided in cases where a subscriber identification is not provided in the call, such that a single service access short code can be used by all subscribers irrespective of their mobile terminal and their location.

1. Field of the Invention
The present invention relates to a method and system for re-routing a call which has been routed from a calling party through a communication network to a destination, wherein the call needs to be relayed from the destination to another destination, as for example in case of a wrong destination such as a wrong message server.
2. Description of the Prior Art
Recently, the features offered by communication networks in connection with so-called value added services have remarkably increased. Among such features, a feature has been developed which permits a calling subscriber to leave a message on a message server for the called subscriber, in case the called subscriber cannot be reached. The called subscriber may then listen to the message which has been left at any later point of time. Thus, such a message server has a function of an answering machine provided at the communication network side.
According to the prior art, several related services have been proposed.
The U.S. Pat. No. 4,930,152 discloses a call return telephone service, wherein a list of the telephone numbers of calling subscribers is kept in a switch (exchange) of the network for the purpose of calling back previously calling subscribers. However, specific messages having a content defined by the calling subscriber cannot be stored for the called subscriber.
Furthermore, EP-A-0 795 992 discloses a method and apparatus for providing a prepaid return call in connection with a message server. The called subscriber as the recipient of messages stored in the message server is not enabled to initiate a listening operation for reading the contents of a message stored for him. Instead, the message server periodically tries to contact the called subscriber in order to deliver the stored message. Thus, the message may never be delivered to the called subscriber.
Additionally, EP-A-0 897 239 discloses a program-controlled communication system, having access to a voice mail server. According to this prior art, a called subscriber may retrieve messages intended for the subscriber from the voice mail server. A calling subscriber may then automatically be called back upon retrieval of the corresponding message. However, such a call back mechanism does not allow a direct call back from the called to the (previously) calling subscriber, since only pre-stored messages are exchanged with an interaction of the message service being involved between the called and the calling subscriber or vice versa.
To enhance the proposed call back mechanisms, a call drop-back function or mechanism has been proposed so as to enable a called subscriber to make a call back call to several different calling subscribers during a single message server session. To achieve this, required information is transmitted between the message server and the exchange or switching center in a call drop-back message using different parameters, that is a call drop-back type indicator indicating if a re-establishment of the listening call to the message server is needed after the call back call is terminated, a call drop-back release reason indicator indicating whether the call back call to the subscriber has been successful or not, and a message server session indicator containing a subscriber identification of the called subscriber and a message identification identifying the message listened to, so as to enable a resumption of the listening call after the call back call has been terminated.
The above call drop-back mechanism leads to the advantage that a called subscriber listening to recorded messages is enabled to carry on listening to his messages after a call back call to the subscriber who has left that message, without the need to make a new call to the message server afterwards. Thus, signaling load in the network can be reduced.
However, an initial direct routing to the right message server may not be possible for example when the subscriber is calling from abroad and the CLI (Calling Line Identification) is not available, or a subscriber not using the own mobile terminal uses a so-called "common access number" to access the message services, such that a HLR interrogation or enquiry for obtaining the subscriber identity is not possible.
In case a message server is accessed via an unstructured data service such as the USSD (Unstructured Supplementary Service Data) service, several message servers may be connected to the same USSD center (USSDC), such that it is quite possible that the call will be connected to a wrong message server.


The present invention incorporates new and useful improvements in the carbon dioxide sequestering mechanism. The ejector systems are rearranged in a manner that lowers the frictional effects of the resultant flow pattern after the flue gas and ejector spray have impacted in the receiver mechanism. The sequestered carbon dioxide resulting from the collision is retained in the scrubber water matrix for a prolonged period by adding a wedging mechanism designated as a compression band which extends the duration of the sequestering operation for a sufficient period of time for the absorbed gases to exit the receiver with the scrubber water flow into a separator vessel.

The invention is a facility for removing carbon dioxide (CO2) from the flue gases of coal fired furnaces by absorption in a water spray or dilute aqueous alkaline spray as described in Ref. 1 of the Cross References. In a subsequent treatment the carbon dioxide absorbed in the scrubber carbonated water system, and entrained in the circulatory system below the receiver, was allowed to diffuse into an ambient atmosphere and disposed of. The present invention follows much of the same procedure but changes the scrubbing operation within the receiver of the system described in Ref. 1 of the Cross References.
It is generally recognized that water under atmospheric equilibrium will absorb an equal volume of carbon dioxide (CO2). Carbon dioxide is a compressible fluid and its volume is easily reduced as a function of the cube of its diameter (Vol=0.536 dia3) such that a much larger quantity can be sequestered in the matrix of the water spray droplets which in this instance is considered incompressible.
Assuming a simplified collision theory in the Ref. 1 design described in the Cross References the flue gas draft flow was impacted with a convergent water spray from ejector nozzles mounted in the receiver which was designed as a cyclone separator. The impact of the ejector spray with the flue gas effluent in the receiver increased the CO2 absorption capability by increasing localized pressure in the area of impact.
Since the new and useful improvements described in this application effect only the method of absorption occurring in the receiver of the scrubber system only this component is described in the detailed description which follows.
Because the system dynamic effects only the local compression at the time of impact the pressure depends exponentially on the velocity at the time of impact and is more effective and is made more efficient by altering the design and placement of those components within the receiver mechanism necessary to improve absorption and to maintain the holding pressure within the scrubber water matrix.
Two changes are present in the redesign of the receiver system mechanism.                1. The water spray ejectors are aligned parallel with the flue gas effluent and both streams will impart their momentum in the same direction and will minimize boundary layer friction.        2. A top rim band, designated as a compression band 27 is added to the receiver cylinder top edge to increase the CO2 retention duration and promote a squeezing action at wedge point 29 retaining the pressure upon the spray droplets.

This patent is subject to a terminal disclaimer.

Carbon dioxide flue gas sequestering mechanism


A securing device for a portable device has a lock assembly and a cable connected to the lock assembly. The lock assembly has two locking pins, two resilient elements, a slider, and a lock mounted in a housing. When the lock is rotated by a key, the lock drives the slider and the slider pushes the locking pins to slide laterally. Thus, the lock assembly can be fastened to a casing with a lock hole and with interior space laterally reserved beside the lock hole. The securing device secures the portable device regardless of thickness of the portable device.

1. Field of the Invention
The present invention relates to a securing device for a portable device, especially to a securing device that secures the portable device at a specific position.
2. Description of the Prior Art(s)
A computer cable lock device comprises a lock and a cable connected to the lock. The lock is for being fastened to a portable device, such as a laptop. With the cable looping around a post, such as a leg of a table, the portable device cannot be taken away from the post, thereby facilitating theft prevention.
A lock of a conventional computer cable lock device has a lock pin. The lock pin is T-shaped and has a cross-rod formed on a distal end of the lock pin. A housing of the portable device has an elongated lock hole transversely formed on the housing. The lock hole corresponds in shape and size to the cross-rod. When in use, the cross-rod is inserted into the housing through the elongated lock hole. Then a key for the lock drives the lock pin to turn by 90 degrees. Thus, the cross-rod is perpendicular to the elongated lock hole and abuts an inner surface of the housing. Accordingly, the lock of the conventional computer cable lock device is fastened to the portable device.
However, in order to allow the cross-rod of the lock pin to be inserted into the housing, a length of the elongated lock hole should be longer or equal to a length of the cross-rod. Moreover, interior space in the housing of the portable device and above and under the lock hole should be reserved for the cross-rod to be turned and abut the inner surface of the housing. As the portable device, such as the laptop, is developed toward the trend of getting thinner and thinner, the portable device would be too thin to allow the conventional computer cable lock device to be fastened to the portable device.
To overcome the shortcomings, the present invention provides a securing device for a portable device to mitigate or obviate the aforementioned problems.