ZyXEL Communications V300 - Manual (Page 115)

Chapter 10 SIP Account Setup
V300 User’s Guide
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Each field is described in the following table.
Table 47 VoIP > SIP > SIP Settings > Advanced Setup
LABEL DESCRIPTION
SIP Server
Settings
URL Type Select whether or not to include the SIP service domain name when the V300
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 V300 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 V300 waits before it tries again to register the
SIP account, if the first try failed or if there is no response.
Session
Expires Active
Select this to have the V300 use the setting you configure in the Session Expire
field. If you do not select this, the V300 does not automatically disconnect calls.
Session
Expires
Enter the number of seconds the conversation can last before the call is
automatically disconnected. Usually, when one-half of this time has passed, the
V300 or the other party updates this timer to prevent this from happening.
Min-SE Enter the minimum number of seconds the V300 accepts for a session expiration
time when it receives a request to start a SIP session. If the request has a shorter
time, the V300 rejects it.
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 V300 to use.
G.711 provides high 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.723 provides good voice quality, and requires 20 or 40 kbps.
• G.726 operates at 16, 24, 32 or 40 kbps.
• By contrast, G.729 only requires 8 kbps.
The V300 must use the same codec as the peer. When two SIP devices start a
SIP session, they must agree on a codec.
Primary
Compression
Type
Select the V300’s first choice for voice coder/decoder.
Secondary
Compression
Type
Select the V300’s second choice for voice coder/decoder.
Third
Compression
Type
Select the V300’s third choice for voice coder/decoder.