电信专业英英词典D-5（在线收听）

　　DCE

　　data circuit terminating equipment

　　DCP

　　digital communications protocol

　　DCS

　　digital cross-connect system

　　DDD

　　direct distance dialing

　　DDN

　　Defense Data Network

　　Digit L

　　Digital L is another amplitude condition that represents a binary digit 0. See binary digit or bit.

　　Digital Carrier Systems

　　Digital Carrier Systems are carrier systems for digital signals that uses regenerative versus linear repeaters and time division multiplexing.

　　Digital Cross Connect System (DCS)

　　DCS is a new generation of switching/multiplex equipment that permits per-channel DS0 (64 kbps) electronic cross-connection from one T1 transmission facility to another, directly from the constituent DSl signals. Commonly referred to as "DACS" (digital access and cross connect system), although this is a trademark of AT&T.

　　Digital Signal

　　A digital signal is a signal (electrical or otherwise) in which information is carried in a limited number of different (two or more) discrete states. The most fundamental and widely used form of the digital signal is binary, in which one amplitude condition represents a binary.

　　Digital Termination Service (DTS)

　　DTS is a service provided by some carriers permitting opera tors of private networks to use digital microwave equipment to gain access to carrier net works. The FCC has allocated a special microwave band for DTS.