QSIG

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QSIG ( Q -Interface Sig nalling Protocol ) is in the telecommunications one to ISDN -based signaling protocol for the networking of telephone systems . The abbreviation QSIG means signaling at the Q reference point . The Q reference point is, based on the ISDN reference model, a connection point for private switching systems (see ISDN reference points ; it should be taken from NT2 there).

construction

The networking of telephone systems is usually done with manufacturer or system-specific protocols. With these proprietary protocols , almost the full range of the features of the telephone systems can also be used across locations, within the corporate network formed with the networking . The networking of telephone systems from different manufacturers is only possible at a low level (e.g. dialing numbers and speaking) without a powerful common protocol. So that systems from different manufacturers can be networked with the latest performance features, QSIG was originally developed by ECMA and standardized by the European Telecommunications Standards Institute (ETSI). The QSIG protocol works similarly to the DSS1 protocol and is in principle compatible with it . However, there are differences in the implementation of performance features.

The QSIG protocol was also from the ATM Forum basis to a signaling protocol for ATM - switches for voice calls to define over ATM networks.

literature

  • Jonathan Davidson, James Peters: Voice over IP Basics. Markt + Technik Verlag, Munich 2000, ISBN 3-8272-5800-6 .
  • Volker Jung, Hans-Jürgen Warnecke (Hrsg.): Handbook for telecommunications. Springer Verlag, Berlin / Heidelberg 1998, ISBN 978-3-642-97703-9 .
  • Jörg Fischer, Christian Sailer: VoIP Practical Guide. 2nd revised and expanded edition, Carl Hanser Verlag, Munich 2016, ISBN 978-3-446-44491-1 .
  • Andreas Kanbach: SIP - The technology. 1st edition, Friedrich Vieweg & Sohn Verlag, Wiesbaden 2005, ISBN 978-3-8348-0052-7 .

Individual evidence

  1. ↑ ITWissen.info: QSIG :: Q-interface signaling protocol :: QSIG protocol

Web links