... access gateway for the headquarters office, converting phone signals into VoIP signals. The AR3200 uplink interfaces connect to the IP Multimedia ... managementVoiceRTP, SIP, SIP AG, IP PBX/TDM PBX, FXO/FXS, VoIP/conference call, BEST, DISA, and SBC3GCDMA 2,000 EV-DO ...