QSIG
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QSIG is an ISDN based signalling protocol for signalling between nodes of a Private Integrated Services Network (PISN). The QSIG protocol carries user and feature information between private branch exchanges. It allows common features such as Camp On and Call Back to be offered across all nodes in the network, Thus for a large or very distributed company that requires multiple nodes, users can receive the same services across the network and be unaware of the switch that their telephone is connected to. This greatly eases the problems of management of large networks.
List of QSIG standards
- ETS 300 052 - Multiple Subscriber Number
- ETS 300 055 - Call Waiting
- ETS 300 092 - Calling Line Identification Presentation (CLIP)
- ETS 300 093 - Calling Line Identification Restriction (CLIR)
- ETS 300 097 - Connected Line Identification Presentation (COLP)
- ETS 300 098 - Connected Line Identification Restriction (COLR)
- ETS 300 130 - Malicious Call Identification
- ETS 300 141 - Call Hold
- ETS 300 182 - Advice Of Charge
- ETS 300 188 - Three Way Conference
- ETS 300 207 - Call Diversion
- ETS 300 258 - Path Replacement (ANF-PR)
- ETS 300 260 - Call Transfer By Join (SS-CT)
- ETS 300 359 - Call Completion To Busy Subscriber (CCBS)
- ETS 300 369 - Explicit Call Transfer
(incomplete)
Source : European Telecommunications Standards Institute (http://www.etsi.org/) (ETSI)