Chapter 26 Voice
VMG/EMG/AM/DM/GM Series User’s Guide
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SIP Account Associated with Select the SIP service provider profile to use for the SIP account you are configuring
in this screen. You should already have configured a SIP service provider profile in
the SIP Service Provider screen.
This field is read-only when you are modifying an existing SIP account.
General
Enable SIP Account Select this if you want the Zyxel Device to use this account. Clear it if you do not
want the Zyxel Device to use this account.
SIP Account Number Enter your SIP number. In the full SIP URI, this is the part before the @ symbol. You can
use up to 127 printable characters and spaces.
Authentication
Username Enter the user name for registering this SIP account, exactly as it was given to you.
You can use up to 95 alphanumeric (0-9, a-z, A-Z), printable special characters and
spaces.
Password Enter the password for registering this SIP account, exactly as it was given to you.
You can use up to 95 alphanumeric (0-9, a-z, A-Z), printable special characters and
spaces.
URL Type
URL Type Select whether or not to include the SIP service domain name when the Zyxel
Device sends the SIP number.
SIP – include the SIP service domain name.
TEL – do not include the SIP service domain name.
Voice Features
Primary/Secondary/Third
Compression Type
Select the type of voice coder or decoder (codec) that you want the Zyxel Device
to use.
G.711 provides higher voice quality but requires more bandwidth (64 kbps).
• G.729 provides good sound quality and reduces the required bandwidth to 8
kbps.
• G.711a is typically used in Europe.
• G.711u is typically used in North America and Japan.
• G.726-24 operates at 24 kbps.
• G.726-32 operates at 32 kbps.
• G.722 operates at 6.3 kbps or 5.3 kbps.
When two SIP devices start a SIP session, they must agree on a codec.
Select the Zyxel Device’s first choice for voice coder or decoder.
Select the Zyxel Device’s second choice for voice coder or decoder. Select None if
you only want the Zyxel Device to accept the first choice.
Select the Zyxel Device’s third choice for voice coder or decoder. Select None if you
only want the Zyxel Device to accept the first or second choice.
Speaking Volume Control Select the loudness that the Zyxel Device uses for speech that it sends to the peer
device. Choices are Minimum, Middle, and Maximum.
Listening Volume Control Select the loudness that the Zyxel Device uses for speech that it receives from the
peer device. Choices are Minimum, Middle, and Maximum.
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 Zyxel Device should stop transmitting when you are not speaking.
This reduces the bandwidth the Zyxel Device uses.
Call Features
Table 131 VoIP > SIP > SIP Account > SIP Account Entry Edit (continued)
LABEL DESCRIPTION
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