Huawei EchoLife ET323 User Manual page 53

EchoLife ET523 IP Phone User Manual
Field
Session
Expiration
Min-SE
Caller Request
Timer
Callee Request
Timer
Force Timer
UAC Specify
Refresher
UAS Specify
Refresher
Force INVITE
Enable 100rel
Account Ring
Tone
Description
Session Expiration is the time (in seconds) which is considered
as the duration for timeout, when no successful session refresh
transaction occurs beforehand. The default value is 180 seconds.
The SIP Session Timer extension enables SIP sessions to be
periodically " refreshed"through a SIP request (UPDATE, or
re-INVITE). Once the session interval expires, if there is no
refresh through the UPDATE or re-INVITE message, the
session is terminated.
Defines the minimum session expiration (in seconds). The
default value is 90 seconds.
If it is set to Yes, the phone will use the session timer when it
makes outbound calls and the remote party supports Session
Timer.
If it is set to Yes, the phone will use the Session Timer when it
receives inbound calls with Session Timer requests.
If it is set to Yes, the phone will use session timer even if the
remote party does not support this feature. If it is set to No, the
session timer is enabled only when the remote party supports this
feature. To turn off Session Timer, select No for Caller Request
Timer, Callee Request Timer, and Force Timer.
As a Caller, select UAC to use the phone as the refresher, or
UAS to use the Callee or proxy server as the refresher.
As a Callee, select UAC to use caller or proxy server as the
refresher, or UAS to use the phone as the refresher.
Session Timer can be refreshed in the INVITE or UPDATE
method. Select Yes to adopt the INVITE method to refresh the
session timer.
PRACK method enables reliability to SIP provisional responses
(1xx series). This is necessary for supporting the PSTN network.
There are four uniquely defined ringtones:
One (1) System Ring Tone: When this option is selected, all
calls will ring with the system ringtone.
Three (3) Customer Ring Tones: When this option is selected,
incoming calls corresponding to designated accounts will play
the selected ringtone.
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4 Configuration Guide