Yealink SIP-T2 SERIES Administrator's Manual page 431

in the INVITE message. The negotiated refresher is always the UAC and it will send an UPDATE
request at the negotiated session expiration. The value "refresher=uac" included in the UPDATE
message means that the UAC performs the refresh.
Example of UPDATE message (UAC mode):
UPDATE sip:1058@10.10.20.34:5060 SIP/2.0
Via: SIP/2.0/UDP 10.10.20.32:5060;branch=z9hG4bK2104991394
From: "10111" <sip:10111@10.2.1.48:5060>;tag=2170397024
To: <sip:1058@10.2.1.48:5060>;tag=200382096
Call-ID: 4_1556494084@10.10.20.32
CSeq: 2 UPDATE
Contact: <sip:10111@10.10.20.32:5060>
Max-Forwards: 70
User-Agent: Yealink SIP-T46G 28.81.0.25
Session-Expires: 90;refresher=uac
Supported: timer
Content-Length: 0
Procedure
Session timer can be configured using the following methods.
Central Provisioning
(Configuration File)
Web User Interface
Details of Configuration Parameters:
Parameters
account.X.session_timer.enable
Description:
Enables or disables the session timer for account X.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), IP phone will send periodic UPDATE requests to refresh the session
<MAC>.cfg
Configuring Basic Features
Configure session timer.
Parameters:
account.X.session_timer.enable
account.X.session_timer.expires
account.X.session_timer.refresher
Configure session timer.
Navigate to:
http://<phoneIPAddress>/servlet?p=a
ccount-adv&q=load&acc=0
Permitted Values
0 or 1
Default
0
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