BRI (Basic Rate Interface) ISDN is a digital telephony interface (P/N XR0037) used to connect to the telephony provider, legacy PBX or ISDN telephone sets. There are two basic configurations for each BRI ISDN telephony interface port – TE (Terminal) – connects to telephony provider and NT (Network) – connects to ISDN phones (requires power supply option) or legacy PBX (as PSTN ISDN trunks).
Each BRI module module has dip-switches to set each port to either NT or TE mode. Power for ISDN phones is supplied by the module. Status LEDs for each port indicate active settings (TE or NT) and line status (no activity, layer 1 active, layer 2 active).
One ISDN interface module (with up to eight BRI ports) may be installed in a single Astribank or Xorcom IP-PBX unit. Use the on-line Product Configurator wizard to determine the most suitable configuration to fit your needs.