User guide

Appendix
275
Parameter
Permitted
Values
Descriptions
Web Setting Path
When the RFC 4916 is enabled on the IP
phone, the caller sends the SIP request
message which contains the from-change tag
in the Supported header. The caller then
receives an UPDATE message from the callee,
and displays the identity in the From header.
The default value is 0.
account.X.session_timer.enable
(X ranges from 1 to 3)
0 or 1
It enables or disables the session timer for
account X.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the IP phone will send
periodic re-INVITE requests to refresh the
session during a call.
The default value is 0.
Account->Advanced->Session Timer
account.X.session_timer.expires
(X ranges from 1 to 3)
Integer from
30 to 7200
It configures the interval (in seconds) for
refreshing the SIP session during a call for
account X.
If it is set to 1800 (1800s), the IP phone will
refresh the session during a call before 1800
seconds.
Account->Advanced->Session
Expires (30~7200s)