User's Manual

Chapter 10 Voice
P-2612HW Series User’s Guide
191
Each field is described in the following table.
Table 53 VoIP > SIP Settings > Advanced
LABEL DESCRIPTION
SIP Account This field displays the SIP account you see in this screen.
SIP Server
Settings
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.
Expiration
Duration
Enter the number of seconds your SIP account is registered with the
SIP register server before it is deleted. The ZyXEL Device automatically
tries to re-register your SIP account when one-half of this time has
passed. (The SIP register server might have a different expiration.)
Register Re-
send timer
Enter the number of seconds the ZyXEL Device waits before it tries
again to register the SIP account, if the first try failed or if there is no
response.
Session Expires Enter the number of seconds the ZyXEL Device lets a SIP session
remain idle (without traffic) before it automatically disconnects the
session.
Min-SE Enter the minimum number of seconds the ZyXEL Device lets a SIP
session remain idle (without traffic) before it automatically disconnects
the session. When two SIP devices start a SIP session, they must agree
on an expiration time for idle sessions. This field is the shortest
expiration time that the ZyXEL Device accepts.
RTP Port Range
Start Port
End Port
Enter the listening port number(s) for RTP traffic, if your VoIP service
provider gave you this information. Otherwise, keep the default values.
To enter one port number, enter the port number in the Start Port and
End Port fields.
To enter a range of ports,
• enter the port number at the beginning of the range in the Start
Port field.
• enter the port number at the end of the range in the End Port field.
Voice
Compression
Select the type of voice coder/decoder (codec) that you want the ZyXEL
Device to use. G.711 provides higher voice quality but requires more
bandwidth (64 kbps).
• G.711A is typically used in Europe.
• G.711u is typically used in North America and Japan.
G.726 operates at 16, 24, 32 or 40 kbps.
By contrast, G.729 only requires 8 kbps.
The ZyXEL Device must use the same codec as the peer. When two SIP
devices start a SIP session, they must agree on a codec.