VoIP Voice and Fax Signal Processing - 201-shi2.4.10 IP PBX Adapter / 40. 2.4.11 Hosting Long-Distance VoIP through PSTN /
40. 2.4.12 Subscribed VoIP Services / 40. 2.5 VoIP Signaling / 41. 2.5.1. VoIP?H.
323 Overview / 41. 2.5.2. VoIP?MGCP Overview / 42. 2.5.3. SIP Signaling / 42.
2.5.4. SIP Call Flow / 43. 3 Voice Compression. 49. 3.1 Compression Codecs / 50
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