VoIP Call Routing
If I knew where the songs came from, I'd go there more often.
Leonard Cohen
Abstract
The Global Switched Telephone Network (GSTN) connects callers in different places around the world. For this Voice service over IP (VoIP) services have received considerable attention in the past decade. This raises the issue of providing seamless voice service (and/or multimedia services) between the Internet and the public switched telephone network. In this chapter, we present call routing in this hybrid Internet-GSTN environment.
Keywords
VoIP; SIP; IP multimedia system (IMS); address translation
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