Specifications

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Table 2-18 SIP related configuration parameter
Title Explanation
SIP related
configuration
MWI subscription
The default is 86400 seconds. The gateway will send platform a message
to confirm that has subscribed MWI service at intervals of the time
period set here. This parameter should be used in conjuection with voice
mail subscription on the page of subscriber line.
PRACK Determine whether to activate Reliable Provisional Responses. (RFC
3262)
Session timer Choose to activate session refresh (Session Timer, RFC 4028). By
default, session timer is not activated.
Session interval Set the session refresh interval, the gateway will enclose the value of
Session-Expires into INVITE or UPDATE messages. Default value is
1800 in second.
Minimum timer Set the minimum value of session refresh interval.
Request/Response
Configure
Contact field in
REGISTER
Choose the registration mode of gateway under LAN traversal
circumstance, the default is “NAT IP Address”.
l LAN IP address: Keep original content of “Contact” when register;
l NAT IP address: Use the NAT information returned by registration
server.
Domain name in
REGISTER
The default is “Domain name”.
l Domain name: Complete domain name used for registration (for
example: [e-mail]);
l Subdomain name: Only use the common part of the name of domain
(for example: [e-mail]).
Via field Choose whether to use NAT IP address or LAN IP address for “Via”
header field value, the default is “NAT IP address”.
To field Choose whether to apply Domain name or Outbound proxy to “To”
header field, the default is “Domain name”.
Address in Call ID
field
Choose whether to fill Call ID field with host name or local IP, the
default is “local IP address”.
Called party number Choose whether the gateway acquires the called number from Request
Line header field or To header field. The default is “from Request L
ine”.
Calling party
number in call
transfer
Under call forwarding, the calling party number sent can be choose from
Originating number or Forwarding number being set for sending, the
default is “Forwarding number”.
For example: the subscriber line 2551111 on the gateway activates call
forwarding feature and set the destination to 3224422. When caller with
13055553333 calls 2551111, the call will be forwarded to 3224422:
l if choose“Originating number”，the number 13055553333 will be sent
to 3224422 as calling party number；
l if choose“Forwarding number”，the number 2551111 will be sent to
3224422 as calling party number；
Do not validate Via Set whether to ignore Via field, By default, Via is ignored.