4800 digital emergency communication system is designed to provide fully supervised, two-way voice communication, between each call station and up to 5 control panels. An internal modem, connected to a public telephone system, provides an automated-timed dial-out capability to an alternate monitoring location. A single control panel can support 1 to 8 call stations. Utilizes Cobranet® digital audio technology for voice communication to call stations. When call is initiated at the call station, this signals the alarm to display at the main and remote control panels. Sound will initiate as well as a detailed description of where the call is coming from on the control panel screen. 4800 digital emergency communication system incorporates a programmable automatic dial feature to connect to an analog telephone line. In the event that an incoming call is not answered, at any of the control panels in a preset amount of time, the 4800 system will dial a pre-programmed phone number to directly connect the call station to a monitoring location. The contractor shall furnish and install the CORNELL A-4800M with optional A-4800R panels as indicated on the plans. Panels shall be programmed to building specifications. Panels shall be mounted in Cornell provided enclosures.