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Table 100 VoIP > SIP > SIP Account > Add new accoun/Edit (continued)
LABEL
DESCRIPTION
URL Type
Select whether or not to include the SIP service domain name when the VMG
sends the SIP number.
SIP - include the SIP service domain name.
TEL - do not include the SIP service domain name.
Voice Features
Primary
Select the type of voice coder/decoder (codec) that you want the VMG to use.
Compression Type
G.711 provides high voice quality but requires more bandwidth (64 kbps). G.711
Secondary
is the default codec used by phone companies and digital handsets.
Compression Type
•
G.711a is typically used in Europe.
Third
•
G.711u is typically used in North America and Japan.
Compression Type
G.726-24 operates at 24 kbps.
G.726-32 operates at 32 kbps.
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.
The VMG must use the same codec as the peer. When two SIP devices start a SIP
session, they must agree on a codec.
Select the VMG's first choice for voice coder/decoder.
Select the VMG's second choice for voice coder/decoder. Select None if you only
want the VMG to accept the first choice.
Select the VMG's third choice for voice coder/decoder. Select None if you only
want the VMG to accept the first or second choice.
Speaking Volume
Select the loudness that the VMG uses for speech that it sends to the peer
Control
device.
-12 is the quietest, and 12 is the loudest.
Listening Volume
Select the loudness that the VMG uses for speech that it receives from the peer
Control
device.
-12 is the quietest, and 12 is the loudest.
Enable G.168
Select this if you want to eliminate the echo caused by the sound of your voice
(Echo
reverberating in the telephone receiver while you talk.
Cancellation)
Enable VAD
Select this if the VMG should stop transmitting when you are not speaking. This
(Voice Active
reduces the bandwidth the VMG uses.
Detector)
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
Select this to enable call transfer on the VMG. This allows you to transfer an
Transfer
incoming call (that you have answered) to another phone.
Enable Call
Select this to enable call waiting on the VMG. This allows you to place a call on
Waiting
hold while you answer another incoming call on the same telephone number.
Call Waiting
Specify a time of seconds that the VMG waits before rejecting the second call if
Reject Timer
you do not answer it.
Chapter 22 Voice
VMG5313-BXB Series User's Guide
221
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