Yealink SIP-T2 SERIES Administrator's Manual page 372

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
T1 (0.5) will continue until the retransmitting time reaches the Timer T2 (4). The total registration
request retry time will be less than 64 times of T1 (64 * 0.5 = 32). The re-transmitting interval in
sequence is: 0.5s, 1s, 2s, 4s, 4s, 4s, 4s, 4s, 4s and 4s.
Timer T4
Timer T4 represents the time the network will take to clear messages between the SIP client and
server.
Procedure
SIP session timer can be configured using the configuration files or locally.
Configuration File
Local
Details of Configuration Parameters:
sip.timer_t1
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)
348
<y0000000000xx>.cfg
Web User Interface
Parameters
Configure SIP session timer.
Parameters:
sip.timer_t1
sip.timer_t2
sip.timer_t4
Configure SIP session timer.
Navigate to:
For
SIP-T48G/T46G/T42G/T41P/T40P/T2
9G/T27P/T23P/T23G/T21(P)
E2/T19(P) E2/CP860:
http://<phoneIPAddress>/servlet?p
=settings-sip&q=load
For SIP VP-T49G:
http://<phoneIPAddress>/servlet?m
=mod_data&p=settings-sip&q=loa
d
Permitted Values
Float from 0.5 to10
Default
0.5