The TIF-4000 is a frame that can house up to twelve digital telephone interface cards (TIF-4000 front cards), with a redundant power supply designed to be compatible with ADAM, ADAM-CS, Cronus and Zeus intercom systems. It provides bidirectional communication between the intercom matrix and an analog telephone line. It allows the phone to access all cross points of the matrix, as well as dynamic party lines, IFB circuits, and other forms of communications. The TIF-4000 supports worldwide telephone standards, ensuring smooth communication across the globe. The 4RU TIF-4000 frame provides a transparent link to the telephone system enabling full dial-out capability from any designated keypanel with keypad. The TIF-4000 also has full dial-in capability giving the caller a keypanel on the system via commands from the DTMF pad on their telephone.

The TIF-2000A is a single-line digital hybrid telephone line interface designed to be compatible with ADAM, ADAM-CS, Cronus, and Zeus series intercom systems. It provides bidirectional communication between the intercom matrix and a standard DTMF capable telephone line. It allows the phone to access all cross points of the matrix, as well as dynamic party lines,, IFB circuits, and other forms of communications. The TIF-2000A supports worldwide telephone standards. The 1RU high by ? wide rackmountable (via an optional MCP-1 or MCP-2 kit). TIF-2000A provides a transparent link to the telephone system enabling full dial-out capability from any designated keypanel with keypad. The TIF-2000A has full dial-in capability giving the caller a keypanel on the system via commands from the DTMF pad on their telephone.

The RTS ISDN-2005 system incorporates G.711 and G.722 audio codecs for bidirectional communications. The ISDN-2005 can be used to remote keypanels, supply trunking data and audio, and as a telephone interface.