SIP Protocol Timers
Parameter Description Default
SIP Timer INVITE Expires (s)
The time (in seconds) after which an
INVITE request expires.
180
SIP Timer Re -INVITE Expires (s)
The time (in seconds) after which a
retransmitted INVITE request expires.
180
SIP Timer Registration Min (s)
The minimum Registration Period (in
seconds).
1
SIP Timer Registration Max (s)
The maximum Registration Period (in
seconds).
7200
SIP Timer Registration Retry (s)
The time interval (in seconds) for retrying
a (failed) REGISTER request.
30
SIP Timer No Answer Duration (s)
The length of time (in seconds) before
terminating a session request.
60
SIP Timer Re-Register Interval (s)
The elapsed time (in seconds) between
an initial and repeat REGISTER request.
20
SIP Session Timer (s)
The time interval (in seconds) for the
session timer.
0
Note: The range for the SIP Protocol Timers is 0 through 65535. However, the SIP Protocol Timers are not
implemented.
Chapter 6: SIP Parameters 23
