Connect up to 4 GXP2200EXT modules to compatible Grandstream phones for a total of 160 contacts/extensions.
The 128 x 384 backlit LCD displays information from the configuration obtained from any UCM / IP-PBX phone system the main phone is configured from, or through the phone web interface. No labels need to be printed.
This expansion module supports traditional call features on each of its programmable buttons, including BLA (bridged line appearance)/SCA (shared call appearance), BLF (busy lamp field, standard or event list), Call Park/Pick-up, Speed Dial, Presence, Intercom, and conference/ transfer/forward.