Yealink SIP-T4X Administration Manual page 306

Parameter-
account.X.advanced.timer_t1
Description
Format
Default Value
Range
Example
Parameter-
account.X.advanced.timer_t2
Description
Format
Default Value
Range
Example
Parameter-
account.X.advanced.timer_t4
Description
Configuration File
<MAC>.cfg
Configures the SIP session timer T1 (in
seconds) for account X.
T1 is an estimate of the Round Trip Time (RTT)
of transactions between a SIP client and SIP
server.
X ranges from 1 to 6.
Float
0.5
0.5 to 10
account.1.advanced.timer_t1 = 0.5
Configuration File
<MAC>.cfg
Configures the session timer T2 (in seconds)
for account X.
T2 represents the maximum retransmit
interval for non-INVITE requests and INVITE
responses. The re-transmitting and doubling
of T1 continues until the retransmitting time
reaches the T2 value.
X ranges from 1 to 6.
Float
4
2 to 40
account.1.advanced.timer_t2 = 4
Configuration File
<MAC>.cfg
Configures the session timer of T4 (in
seconds) for account X.
T4 represents the maximum duration a
message will remain in the network.
Appendix
291