TERRA-FXO is an IP telephone interface with 2 sets of telephone lines and DTMF management for receiving calls or broadcasting calls. The CH1 of TERRA-FXO supports full duplex communication with AEC (Acoustic Echo Cancellation). It is suitable for the use of analogue and digital phone systems. The typical analogue phone application can be the traditional telephone line/cell phone to intercom/paging to a chosen TERRACOM device (or a device group) through TERRA-FXO, in addition to the digital phone application, the TERRA-FXO can act as a dial agent and let the IP phone (AVAYA, CISCO & 3COM etc.) to dial DTMF keys and proceed intercom/paging with a chosen TERRACOM device (or a device group). The TERRA-FXO is easily congured via web interface providing full control over features such as read telephone line status (call in, ringing, disconnect etc.) and hang up Line 1/Line 2 manually or via 3rd party commands, pre-chime/post-chime/SIP call tone setting, scheduler & output levels.