Extension Modules – GXP2200 EXT Product Description GXP2200 EXT 128×384 backlit LCD display 20 per page (each module contains 2 pages, for up to 40 lines per module) Connect 4 modules for up to 160 contacts/extensions See also different: Facility Access Systems – GDS3702 IP PBX Solutions – UCM RemoteConnect (UCMRC) IP PBX Solutions – CloudUCM GXV IP Video Phones – GXV3370