SL Module

Publisher

Kamailio project

URL

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

Published

unknown

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

GPL-2.0 project documentation; not confirmed on page; no-redistribution; short excerpts and locators only

Source notes citing this source

• The Kamailio sl module adds a signature to the to-tag of local stateless replies to INVITE so that the matching ACKs can be filtered instead of forwarded downstream, and after a timeout all ACKs are let through. in context
• Kamailio sl_send_reply() sends replies statelessly, independent of the tm module, and does not retransmit replies to INVITE. in context
• The Kamailio send_reply() function replies statefully if a tm transaction exists for the request and statelessly otherwise. in context
• The Kamailio sl module lets the server act as a stateless UA server and generate replies to SIP requests without keeping state. in context

Cite this source record

APA

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

BibTeX

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