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DDCO

Extension (telephone)

Europe) to tell the PBX to connect with an outside landline (also called DDCO, or Direct Dial Central Office) to dial an external number. Within the PBX

Leadership of the United States Cyber Command

Operations (J3) Ahmed T. Williamson, Deputy Director, Current Operations (J3 DDCO) Brian D. Vile, Deputy Director, Future Operations (J3 DDFO) Kevin P. Lenox

Trunking

E1, ISDN, PRI or SIP. The dial tone lines for outgoing calls are called DDCO (Direct Dial Central Office) trunks. In the UK and the Commonwealth countries

Direct inward dial

corresponding to DID, is direct outward dialing (DOD) or direct dial central office (DDCO). This service is often combined with DID service and allows direct dialing

List of telephony terminology

Caller Line ID UK CTI Computer telephony integration COSMOS Wire records DDCO Direct Dial Central Office (Opposite of DID) US DDD Direct Distance Dialing