TM Module

Publisher

Kamailio project

URL

https://www.kamailio.org/docs/modules/6.1.x/modules/tm.html

Published

unknown

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

GPL-2.0 project documentation (module docs ship with GPL source); not confirmed on page; no-redistribution; short excerpts and locators only

Source notes citing this source

• In Kamailio, t_on_failure() names a failure_route block that runs after a transaction completes with a negative result but before the final reply is sent upstream, which is how serial failover such as forward-on-no-reply is scripted. in context
• The Kamailio tm parameter fr_inv_timer (INVITE final-response timeout after a provisional reply has been received) defaults to 120000 ms. in context
• The Kamailio tm parameter fr_timer (final-response timeout for non-INVITE requests, and for INVITE before any provisional reply) defaults to 30000 ms. in context
• The Kamailio tm module provides stateful SIP transaction processing: it creates transaction state, absorbs upstream retransmissions, generates downstream retransmissions and correlates replies with requests. in context
• In Kamailio, t_newtran() creates a new transaction without relaying and is typically used when Kamailio acts as a UAS. in context
• In Kamailio, t_relay() creates the SIP transaction if none exists yet and relays the request statefully to the current request URI or a given destination. in context

Cite this source record

APA

WarmTransfer. (2026, September 24). TM Module. WarmTransfer. https://warmtransfer.net/knowledge/sources/kamailio-docs-6-1-tm

BibTeX

@misc{warmtransfer-kamailio-docs-6-1-tm,
  title  = {TM Module},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/kamailio-docs-6-1-tm},
  note   = {Kamailio project, accessed 2026-09-24}
}