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Last updated: Sat Feb 3 05:02:06 2007
Asterisk developer's documentation :: Codename Pineapple
See table 4 in RFC 3261 for reference
- T1: RTT estimate, ranging from 0 to 64 seconds. Default is 500 ms. If you have qualify turned on for a device, the measured RTT is used. This timer controls retransmission timers and timeouts for dialogs. (RFC 3261) Settable in sip.conf as "t1default"
- T2: Maximum retransmit interval for non-invite requests. Defaults to 4 seconds. Settable in sip.conf as "t2default"
- T4: Maximum duration for an outstanding transaction. Defaults to 5 seconds (RFC 3261, section 17.1.2 for non-INVITE transactions) This is the time to keep a transaction in COMPLETED state open for retransmission on unreliable transports (UDP). Not implemented.
- A: INVITE request retransmit interval on UDP Initially T1. Implemented in the retransmit function retrans_pkt() Section 17.1.1.2
- B: Invite transaction timeout timer. Defaults to 64*T1 Implemented partially. Section 17.1.1.2
- D: Wait time for UDP retransmits of responses Section 17.1.1.2
- F: Non-INVITE transaction timeout timer Section 17.1.2.2
- H: Wait time for ACK receipt - 64*T1 Section 17.2.1
- I: Wait time for ACK UDP retransmits. Defaults to T4 for UDP. Section 17.2.1
- J: Wait time for non-INVITE request retransmits. Initially 64*T1. Section 17.2.2
- K: Wait time for response retransmits. Initially T4 for UDP Section 17.1.2.2
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