Yealink T27P

Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones
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The default value is 5s.
5. Click Confirm to accept the change.
Session timer allows a periodic refresh of SIP sessions through a re-INVITE request, to
determine whether a SIP session is still active. Session timer is specified in RFC 4028. IP
phones support two refresher modes: UAC and UAS. The UAC mode means refreshing
the session from the client, while the UAS mode means refreshing the session from the
server. The session expiration and session refresher are negotiated via the
Session-Expires header in the INVITE message. The negotiated refresher will send a
re-INVITE/UPDATE request at or before the negotiated session expiration.
Procedure
Session timer can be configured using the configuration files or locally.
Configuration File
<MAC>.cfg
Configure session timer.
Parameters:
account.X.session_timer.enable
account.X.session_timer.expires
account.X.session_timer.refresher
Local
Web User Interface
Configure session timer.
Navigate to:
http://<phoneIPAddress>/servlet
?p=account-adv&q=load&acc=
0