Sip Session Timer - Yealink SIP-T2 SERIES Administrator's Manual

Phone User Interface:
None
To configure use outbound proxy in dialog via web user interface:
Click on Features->General Information.
1.
Select the desired value from the pull-down list of Use Outbound Proxy In Dialog.
2.
Click Confirm to accept the change.
3.

SIP Session Timer

SIP session timers T1, T2 and T4 are SIP transaction layer timers defined in
session timers are configurable on IP phones.
Timer T1
Timer T1 is an estimate of the Round Trip Time (RTT) of transactions between a SIP client and
SIP server.
Timer T2
Timer T2 represents the maximum retransmitting time of any SIP request message. The
re-transmitting and doubling of T1 will continue until the retransmitting time reaches the T2
value.
Example:
The user registers a SIP account for the IP phone and then set the value of Timer T1, Timer T2
respectively (Timer T1: 0.5, Timer T2: 4). The SIP registration request message will be
re-transmitted between the IP phone and SIP server. The re-transmitting and doubling of Timer
Parameter
Configuring Basic Features
Permitted Values Default
RFC 3261. These
347