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common channel signalling (CCS)

Common Channel Signalling (CCS) is a signalling system in which the signalling information is transmitted separately from the user data. This out-of-band sign alling is used in many telephone networks

. For example, in ISDN, the signaling for the basic access and the primary multiplex access

iscarried over the separate D channel. In addition, central channel signaling is used in SS7 signaling


Overview of Signaling Types

Overview of Signaling Types

In addition to the signaling used in ISDN, Q-Interface Signaling Protocol (QSIG), Corporate ISDN Network Protocol (CORNET), and Digital Private Network Signaling System (DPNSS) are also signaling systems that transmit signaling information separately. In contrast, Channel Associated Signalling (CAS) transmits the signalling information together with the user data. This signalling is also known as inner-band


Common Channel Signalling provides a relatively fast connection setup, it has short redial times, efficient routing and supports a wide variety of signalling.

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Englisch: common channel signalling - CCS
Updated at: 05.11.2012
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