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Chapter 14 SIP Account Setup
• G.729 is an Analysis-by-Synthesis (AbS) hybrid waveform codec that uses a filter based
on information about how the human vocal tract produces sounds. The codec analyzes the
incoming voice signal and attempts to synthesize it using its list of voice elements. It tests
the synthesized signal against the original and, if it is acceptable, transmits details of the
voice elements it used to make the synthesis. Because the codec at the receiving end has
the same list, it can exactly recreate the synthesized audio signal. G.729 provides good
sound quality and reduces the required bandwidth to 8kbps.
14.2 SIP Settings Screen
Click SIP to open the following screen. Use this screen to maintain basic information about
each SIP account. Your VoIP service provider (the company that lets you make phone calls
over the Internet) should provide this.
Figure 132 SIP
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V630 User's Guide
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Troubleshooting
