It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
GXP2120 is an IP Phone of a new generation. It has six lines, a large LCD screen with a 320x160 resolution, 4 programmable context-sensitive soft keys (XML), 7 programmable speed dial keys with BLF support, two network PoE ports and probability of five-sided conference.