ZyXEL Communications P8802T, User Manual

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Chapter 15 Voice
Basic Home Station VDSL2 P8802T User’s Guide
206
Primary
Compression
Type
Secondary
Compression
Type
Third
Compression
Type
Select the type of voice coder/decoder (codec) that you want the VDSL
Router to use.
G.711 provides high voice quality but requires more bandwidth (64
kbps). G.711 is the default codec used by phone companies and digital
handsets.
• G.711a is typically used in Europe.
• G.711u is typically used in North America and Japan.
G.722 is a 7 KHz wideband voice codec that operates at 48, 56 and 64
kbps. By using a sample rate of 16 kHz, G.722 can provide higher
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 VDSL Router must use the same codec as the peer. When two SIP
devices start a SIP session, they must agree on a codec.
Select the VDSL Router’s first choice for voice coder/decoder.
Select the VDSL Router’s second choice for voice coder/decoder. Select
None if you only want the VDSL Router to accept the first choice.
Select the VDSL Router’s third choice for voice coder/decoder. Select
None if you only want the VDSL Router to accept the first or second
choice.
Speaking
Volume Control Enter the loudness that the VDSL Router uses for speech that it sends
to the peer device.
Minimum is the quietest, and Maximum is the loudest.
Listening
Volume Control Enter the loudness that the VDSL Router uses for speech that it receives
from the peer device.
Minimum is the quietest, and Maximum is the loudest.
Enable G.168
(Echo
Cancellation) Select this if you want to eliminate the echo caused by the sound of
your voice reverberating in the telephone receiver while you talk.
Enable VAD
(Voice Active
Detector) Select this if the VDSL Router should stop transmitting when you are
not speaking. This reduces the bandwidth the VDSL Router uses.
Call Features
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.
Enable Call
Transfer Select this to enable call transfer on the VDSL Router. This allows you to
transfer an incoming call (that you have answered) to another phone.
Enable Call
Waiting Select this to enable call waiting on the VDSL Router. This allows you to
place a call on hold while you answer another incoming call on the same
telephone number.
Call Waiting
Reject Timer Specify a time of seconds that the VDSL Router waits before rejecting
the second call if you do not answer it.
Table 73 VOIP > SIP > SIP Account (continued)
LABEL DESCRIPTION