Chapter 9 Voice
Table 57 VoIP > SIP > SIP Account (continued)
LABEL | DESCRIPTION | |
Primary | Select the type of voice coder/decoder (codec) that you want the P- | |
Compression | ||
Type | G.711 provides high voice quality but requires more bandwidth (64 | |
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Secondary | kbps). G.711 is the default codec used by phone companies and digital | |
Compression | handsets. | |
Type | • G.711a is typically used in Europe. | |
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Third | • G.711u is typically used in North America and Japan. | |
Compression | G.722 is a 7 KHz wideband voice codec that operates at 48, 56 and 64 | |
Type | ||
kbps. By using a sample rate of 16 kHz, G.722 can provide higher | ||
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| fidelity and better audio quality than narrowband codecs like G.711, in | |
| which the voice signal is sampled at 8 KHz. | |
| G.726 operates at 24 or 32 kbps. | |
| The | |
| SIP devices start a SIP session, they must agree on a codec. | |
| Select the | |
| Select the | |
| Select None if you only want the | |
| choice. | |
| Select the | |
| None if you only want the | |
| choice. | |
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Speaking | Enter the loudness that the | |
Volume Control | sends to the peer device. | |
| Minimum is the quietest, and Maximum is the loudest. | |
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Listening | Enter the loudness that the | |
Volume Control | receives from the peer device. | |
| Minimum is the quietest, and Maximum is the loudest. | |
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Enable G.168 | Select this if you want to eliminate the echo caused by the sound of | |
(Echo | your voice reverberating in the telephone receiver while you talk. | |
Cancellation) |
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Enable VAD | Select this if the | |
(Voice Active | not speaking. This reduces the bandwidth the | |
Detector) |
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Call Features |
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Send Caller ID | Select this if you want to send identification when you make VoIP phone | |
| calls. Clear this if you do not want to send identification. | |
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Enable Call | Select this to enable call transfer on the | |
Transfer | you to transfer an incoming call (that you have answered) to another | |
| phone. | |
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Enable Call | Select this to enable call waiting on the | |
Waiting | you to place a call on hold while you answer another incoming call on | |
| the same telephone number. | |
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200 |
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