Common Channel Signaling

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Central channel signaling ( ZKZ ) or common channel signaling ( CCS ) refers to signaling methods that have separate signaling channels. The signaling information required for a telephone call is transmitted separately from the voice channel via its own channels.

CCS signaling methods are generally used today in telephone networks, both with ISDN telephones ( D-channel ) and between exchanges . Known CCS signaling methods are Signaling System No. 7 (SS7) and Digital Subscriber System No. 1 (DSS1).

Since a separate transmission channel is available for signaling information, relatively complex functions and services can also be implemented with this.

literature

  • John G. van Bosse, Fabrizio U. Devetak: Signaling in Telecommunication Networks . 2nd Edition. Wiley-Interscience, 2006, ISBN 978-0-471-66288-4 , Chapter 5: Introduction to Common-Channel Signaling.