VIC-2DIDCISCOThe two-port DID voice interface card, VIC-2DID, is a two-port inward dialing voice interface card DID is a service offered by telephone companies that enables callers to dial directly to an extension on a Private Branch Exchange (PBX) or packet voice system. VIC-2DID card will service two analog DID trunks using analog voice or fax It has dual working modes: DID and FXS. Two working modes are mutually exclusive.