Value Range
• 250
• 500
• 1000
• 2000
• 4000
Default Value 500
Configuration File Reference SIP_TIMER_T1_n
T2 Timer
Description Specifies the maximum interval, in seconds, between transmissions
of SIP messages.
Value Range
• 2
• 4
• 8
• 16
• 32
Default Value 4
Configuration File Reference SIP_TIMER_T2_n
REGISTER Expires Timer
Description Specifies the length of time, in seconds, that the registration remains
valid. This value is set in the "Expires" header of the REGISTER
request.
Value Range 1–4294967295
Default Value 3600
Configuration File Reference REG_EXPIRE_TIME_n
Enable Session Timer (RFC 4028)
Description Specifies the length of time, in seconds, that the unit waits before
terminating SIP sessions when no reply to repeated requests is
received.
Value Range 0, 60–65535
Default Value 0
Configuration File Reference SIP_SESSION_TIME_n
Session Timer Method
Description Selects the refreshing method of SIP sessions.
Value Range
• INVITE
• UPDATE
• INVITE/UPDATE
4.5.2 SIP Settings [Line 1]–[Line n]
Document Version: 2017-07 Administrator Guide 121