VPN gateways and other vendors gateways. By connecting the PC to the phone this will support both phone and computer operations back to the corporate network systems. Current models The 9601 is a Session Initiation Protocol (SIP) only phone for use with SIP Voice over Internet Protocol (VoIP) systems. The 9608 phone is an eight-line phone with directory and speed dial functions, with a monochrome display and four programmable keys. The device also supports Bluetooth headsets. The 9611G phone has a 3.5-inch color display and supports eight lines. The device has a built in gigabit Ethernet switch to allow a PC to connect to the network through the phone. The 9621G phone has a 4.3-inch color touchscreen. The 9641G phone has a 4.7-inch color touchscreen. The device has a built in gigabit Ethernet switch to allow a PC to connect to the network through the phone. The 9620L phone is a PoE Class 1 phone. The 9630G and the 9640G phones have advanced features and the 9630 can handle up to 24 lines. The 9650C phone is a receptionists style phone or is used by contact center agents. The 9670G phone has a 6.4-inch touchscreen, and is a cross between a PC and a phone. New applications can be downloaded into the phone to have access to Internet-based information. All of these phone models are designated as Class 1 PoE devices typically only drawing between 2.2 and 2.7 watts. This low power consumption decreases the total cost of ownership. All of the phones except for the 9601 can run firmware that allows communications over the H.323, or SIP protocols. Functionality The Avaya 9600 phone series supports DHCP functionality. This means that you can plug the phone into a standard Ethernet port and it will obtain an IP address for connectivity on a data network. Using this data connectivity the phone series is able to transmit Voice over Internet protocol or VoIP. The voice traffic is compressed to provide efficiency of transmission using one of the standard CODECs such as G711 or G729. In this way a data network connection can Multiplex both voice and data transmissions over a single physical link. Avaya 9600 phone models support a built in switch functionality. This allows a computer to be plugged into the back of the phone. The phone implements network bridge functionality so that a single data switch port from a data