Procedure
Step 1 Select Voice > SIP.
Step 2 In the SIP Timer Values section, set the SIP timer values in seconds as described in SIP Timer Values (sec),
on page 349.
Step 3 Click Submit All Changes.
SIP Timer Values (sec)
DescriptionParameter
RFC 3261 T1 value (RTT estimate) that can range
from 0 to 64 seconds.
Default: 0.5 seconds
SIP T1
RFC 3261 T2 value (maximum retransmit interval for
non-INVITE requests and INVITE responses) that
can range from 0 to 64 seconds.
Default: 4 seconds
SIP T2
RFC 3261 T4 value (maximum duration a message
remains in the network), which can range from 0 to
64 seconds.
Default: 5 seconds.
SIP T4
INVITE time-out value, which can range from 0 to
64 seconds.
Default: 16 seconds.
SIP Timer B
Non-INVITE time-out value, which can range from
0 to 64 seconds.
Default: 16 seconds.
SIP Timer F
INVITE final response, time-out value, which can
from 0 to 64 seconds.
Default: 16 seconds.
SIP Timer H
ACK hang-around time, which can range from 0 to
64 seconds.
Default: 16 seconds.
SIP Timer D
Non-INVITE response hang-around time, which can
range from 0 to 64 seconds.
Default: 16 seconds.
SIP Timer J
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
349
Cisco IP Phone Installation
SIP Timer Values (sec)
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