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Cannot configure the Cisco VIC-4FXS/DID Analog Voice Interface Card to use DID trunk ports on a Cisco 2821 voice gateway

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Core Issue

The Cisco VIC-4FXS/DID Analog Voice Interface Card (VIC-4FXS/DID) can operate in both foreign exchange station (FXS) (default setting) and direct-inward-dial (DID) modes    on the Cisco 1751 and 1760. On other voice platforms the VIC-4FXS/DID card currently    only operates in FXS mode when the card is installed in one of these network modules:

  • 1-slot IP communications voice/fax network module   (NM-HD-1V)
  • 2-slot IP communications voice/fax network module   (NM-HD-2V)
  • 2-slot IP communications enhanced voice/fax network module   (NM-HD-2VE)
  • IP communications high-density digital voice/fax network module   (NM-HDV2)

Resolution

Upgrade to Cisco IOS  Software Release 12.3.(14)T or later in order to use the card in DID mode. In    Cisco IOS Software Release 12.3(14)T and later, both modes of operation are    available for the VIC-4FXS/DID card when installed on these voice network modules. 

Refer to Software Center (Downloads) Cisco IOS Software to upgrade to Cisco IOS Software Release 12.3(14)T.

Refer to Understanding Direct Inward Dial (DID) Voice Interface Cards for more information.