Yes. You can see these options in the stock SIP profile configuration XML: 1) <!-- Initial retransmission interval (in milliseconds). Set the T1 retransmission interval used by the SIP transaction engine. The T1 is the initial duration used by request retransmission timers A and E (UDP) as well as response retransmission timer G. --> <!-- <param name="timer-T1" value="500" /> --> 2) <!-- Transaction timeout (defaults to T1 * 64). Set the T1x64 timeout value used by the SIP transaction engine. The T1x64 is duration used for timers B, F, H, and J (UDP) by the SIP transaction engine. The timeout value T1x64 can be adjusted separately from the initial retransmission interval T1. --> <!-- <param name="timer-T1X64" value="32000" /> --> 3) <!-- Maximum retransmission interval (in milliseconds). Set the maximum retransmission interval used by the SIP transaction engine. The T2 is the maximum duration used for the timers E (UDP) and G by the SIP transaction engine. Note that the timer A is not capped by T2. Retransmission interval of INVITE requests grows exponentially until the timer B fires. --> <!-- <param name="timer-T2" value="4000" /> --> 4) <!-- Transaction lifetime (in milliseconds). Set the lifetime for completed transactions used by the SIP transaction engine. A completed transaction is kept around for the duration of T4 in order to catch late responses. The T4 is the maximum duration for the messages to stay in the network and the duration of SIP timer K. --> <!-- <param name="timer-T4" value="4000" /> --> -- Alex On 12/18/2013 04:37 AM, Grant Bagdasarian wrote:
Hello,
The SIP RFC defines some timers and their default values.
Is it possible to override these values in sip profiles or somewhere else?
T1 500ms default Section 17.1.1.1 RTT Estimate
T2 4s Section 17.1.2.2 The maximum retransmit
interval for non-INVITE
requests and INVITE
responses
T4 5s Section 17.1.2.2 Maximum duration a
message will
remain in the network
Timer A initially T1 Section 17.1.1.2 INVITE request retransmit
interval, for UDP only
Timer B 64*T1 Section 17.1.1.2 INVITE transaction
timeout timer
Timer C > 3min Section 16.6 proxy INVITE transaction
bullet 11 timeout
Timer D > 32s for UDP Section 17.1.1.2 Wait time for response
0s for TCP/SCTP retransmits
Timer E initially T1 Section 17.1.2.2 non-INVITE request
retransmit interval,
UDP only
Timer F 64*T1 Section 17.1.2.2 non-INVITE transaction
timeout timer
Timer G initially T1 Section 17.2.1 INVITE response
retransmit interval
Timer H 64*T1 Section 17.2.1 Wait time for
ACK receipt
Timer I T4 for UDP Section 17.2.1 Wait time for
0s for TCP/SCTP ACK retransmits
Timer J 64*T1 for UDP Section 17.2.2 Wait time for
0s for TCP/SCTP non-INVITE request
retransmits
Timer K T4 for UDP Section 17.1.2.2 Wait time for
0s for TCP/SCTP response retransmits
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