Connects to IP500 base card - When connected to IP500 base card, it provides 4 loop-start analog trunk ports
Also provides DTMF, caller ID (ICLID), busy tone detection
Adjustable echo cancellation - Selectable to Off, 8, 16, 32, 64, and 128 milliseconds
Power Failure Transfer - When fitted to an IP500 analog phone base card. During power failure, the first extension port (port 1) is connected to the first analog trunk (port 9)
Maximum - 4 per IP500 control unit
Compatibility
Only compatible with IP Office 8.1.63 (Feature Pack 1) or higher
Requires an IP500 Digital Station 8, Analog Phone 2, Analog Phone 8, ETR 6, TCM 8, VCM 32, or VCM 64 base card with empty daughter card slot