Yealink SIP-T48G

Configuring Basic Features
295
Details of Configuration Parameters:
Parameters
Permitted Values
Default
sip.timer_t1
Float from 0.5 to10
0.5
Description:
Configures the SIP session timer T1 (in seconds).
T1 is an estimate of the Round Trip Time (RTT) of transactions between a SIP client
and SIP server.
Web User Interface:
Settings->SIP->SIP Session Timer T1 (0.5~10s)
Phone User Interface:
None
sip.timer_t2
Float from 2 to 40
4
Description:
Configures the SIP session timer T2 (in seconds).
Timer T2 represents the maximum retransmitting time of any SIP request message.
Web User Interface:
Settings->SIP->SIP Session Timer T2 (2~40s)
Phone User Interface:
None
sip.timer_t4
Float from 2.5 to 60
5
Description:
Configures the SIP session timer of T4 (in seconds).
T4 represents the maximum duration a message will remain in the network.
Web User Interface:
Settings->SIP->SIP Session Timer T4 (2.5~60s)
Phone User Interface:
None
To configure session timer via web user interface:
1. Click on Settings->SIP.
2. Enter the desired value in the SIP Session Timer T1 (0.5~10s) field.
The default value is 0.5.
3. Enter the desired value in the SIP Session Timer T2 (2~40s) field.