CSA

Carrier Serving Area

CSC

Common Signaling Channel

CSU

Channel Service Unit, an interface to a T1 line that terminates the local loop.

CTE

Channel Terminating Equipment (Network)

CTS

Clear To Send, a lead on an interface indicating that the DCE is ready to receive data.

D4

A common T1 framing format, consisting of 12 frames. Also known as SF framing.

DACS

Digital Access and Cross-connect System (an electronic digital test access and patching system)

DCC

Data Communication Channel

DCE

Data Communications Equipment

DCS

Digital Cross-connect System

D-channel

Full-duplex, 16 kbps BRI channel or 64 kbps PRI ISDN channel.

DDS

Digital Data Service

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Glossary

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Zhone Technologies IMACS-200 manual Csa, Csc, Csu, Cte, Cts, Dacs, Dcc, Dce, Dcs, Dds