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

Synopsis

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).

Table of Contents

  • 1. Synopsis
  • 2. Signalling System No. 7 (SS7)
    • 2.1 MFC/R2
    • 2.2 SS7 network structure
      • 2.2.1 Signal Switching Point (SSP)
      • 2.2.2 Signal Transfer Point (STP)
      • 2.2.3 Signal Control Point (SCP)
    • 2.3 SS7 packets and addressing
    • 2.4 Call establishment messages
    • 2.5 SS7 is antiquated
    • 2.6 Higher level SS7 applications
    • 2.7 ISDN and SS7
  • 3. The Intelligent Network
  • 4. CLASS services
    • 4.1 Calling Number Display – Caller ID
    • 4.2 Caller ID spoofing
  • 5. PABXs and key systems
    • 5.1 VoIP PABXs
    • 5.2 Asterisk and Trixbox
  • 6. Payphones
  • 7. Centrex Services
  • 8. Computer Telephony Integration (CTI)
    • 8.1 CTI applications
    • 8.2 CTI standards
  • 9. Number portability (NP)
    • 9.1 The ‘Simple Intelligent Network’ solution
    • 9.2 Assigning the costs of portability
  • 10. Related reports
  • Exhibit 1 – CLASS Services

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Licence Information

Focus Report Profile

Technologies

Telecoms Infrastructure

Number of pages 14

Status Archived

Last updated 1 Aug 2006
Update History

Analyst: Robin Whittle

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