VoIP and SS7


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VoIP and SS7
1010500 VoIP and SS7For a long time, signaling in circuit-switched networks was such that the signaling related to a particular call followed the same path as the speech for that call all the way through the network. This approach is known as channel-associated signaling (CAS), and the technique is rapidly becoming obsolete. Examples include the R1 multifrequency (MF) signaling used in North America and the R2 multifrequency-compelled (MFC) signaling used in many other countries. Although it is still used in circuit-switched networks, CAS is considered old technology. The prevailing technology in newer circuit-switched networks is common …
Citation
Richard Swale; Daniel Collins,: Carrier-Grade VoIP, Third Edition. VoIP and SS7, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export