For Cisco 2600XM, 2691, 3640, 3660, and 3700 platforms, only FXS functionality is supported
For the VIC-4FXS/DID, the Cisco 1751 and 1760 platforms are the only places where both the DID functionality and FXS functionality of the card are supported
Voice & Fax Integration
Caller ID support
A maximum of eight REN loads can be supported on each 4-port FXS/DID VIC
Minimum Feature Sets: IP/VOX PLUS
Ringing frequencies: 20 Hz, 50 Hz
Tone disconnect supervision: DID-Power denial (caller party control, far-end disconnect)
Signaling Formats:
DID mode: Immediate, delay dial, wink start
FXS mode: Groundstart and loopstart
Address Signaling formats:
In-band dual tone multifrequency (DTMF)
Out-of-band pulse (10/20 pps)
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