Technology - Infrastructure - Networks 2 - SS7 PABXs Centrex CTI Number Portability

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Last updated: 1 Aug 2006 Update History

Report Status: Archived

Report Pages: 14

Analyst: Robin Whittle


Signalling System 7 is the protocol by which most telephone exchanges communicate and set up calls. This report discusses SS7 and the older MFC/R2 signalling protocols, - ISDN and POTS calls, CLASS services, and Centrex PABX emulation across multiple sites, including with the Asterisk open-source server-based system. Also discussed are PABXs, ‘key systems’, Computer Telephony Integration (CTI) and Number Portability (NP).

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