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SIPAPI Developer's Guide     Oracle Solaris 11.1 Information Library
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Document Information

Preface

1.  SIP Overview

2.  Oracle Solaris SIP Internals

3.  Multithreading and URI Support

4.  SIP API Functions

A.  Examples of Use

B.  Programming with the SIP API

C.  Transaction Timers

Index

Appendix C

Transaction Timers

Table C-1 SIP Transaction Timers

Timer
Default Value
RFC 3261 Section
Meaning
T1
500 milliseconds
17.1.1.1
RTT Estimate
T2
4 seconds
17.1.2.2
Maximum retransmit interval for non-INVITE requests and INVITE responses
T4
5 seconds
17.1.2.2
Maximum duration that a message remains in the network
Timer A
T1
17.1.1.2
INVITE request retransmit interval, for UDP only
Timber B
64*T1
17.1.1.2
INVITE transaction timeout timer
Timer C
> 3 minutes
16.6 (bullet 11)
Proxy INVITE transaction timeout
Timer D
> 32 seconds for UDP, 0 for TCP/SCTP
17.1.1.2
Wait time for response retransmits
Timer E
T1
17.1.2.2
Non-INVITE request retransmit interval, for UDP only
Timer F
64 * T1
17.1.2.2
Non-INVITE transaction timeout timer
Timer G
T4 for UDP, 0 for TCP/SCTP
17.2.1
INVITE response retransmit interval
Timer H
64 * T1
17.2.1
Wait time for ACK receipt
Timer I
T4 for UDP, 0 for TCP/SCTP
17.2.1
Wait time for ACK retransmits
Timer J
64 * T1 for UDP, 0 for TCP/SCTP
17.2.2
Wait time for non-INVITE request retransmits
Timer K
T4 for UDP, 0 for TCP/SCTP
17.1.2.2
Wait time for response retransmits