ZyXEL Communications P-2602HWLNI User Manual page 181

Table 62 VoIP > SIP Settings > Advanced
LABEL
URL Type
Expiration
Duration
Register Re-send
timer
Session Expires
Min-SE
RTP Port Range
Start Port
End Port
Voice
Compression
Primary
Compression
Type
Secondary
Compression
Type
Third
Compression
Type
DTMF Mode
Outbound Proxy
P-2602HWLNI User's Guide
DESCRIPTION
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.
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.)
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.
Enter the number of seconds the ZyXEL Device lets a SIP session remain idle
(without traffic) before it automatically disconnects the session.
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.
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.
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.
Select the ZyXEL Device's first choice for voice coder/decoder.
Select the ZyXEL Device's second choice for voice coder/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/decoder. Select None if
you only want the ZyXEL Device to accept the first or second choice.
Control how the ZyXEL Device handles the tones that your telephone makes
when you push its buttons. You should use the same mode your VoIP service
provider uses.
RFC 2833 - send the DTMF tones in RTP packets.
PCM - send the DTMF tones in the voice data stream. This method works best
when you are using a codec that does not use compression (like G.711). Codecs
that use compression (like G.729 and G.726) can distort the tones.
SIP INFO - send the DTMF tones in SIP messages.
Chapter 11 Voice
181