Features:
- Contains circuitry necessary for voice switching
- Responsible for all system tones, system timing and station status control
- Contains the DTMF tone generators, a DTMF tone receiver, the circuitry and connections for background music and music on hold and a 14.4 Kbps modem
System Requirements/Compatibility:
- Works with Isoetec Digital System/Executone Integrated Digital Systems (IDS™) 108, 228, 432 and 648