In Kamailio's tm module, if no reply at all is received for a request before fr_timer expires (default 30000 ms), the transaction is terminated with a 408 handled in failure route.
Checked 2026-10-02
the transaction is terminated with a 408 in failure route
- Vendor
- Kamailio
- Product
- Kamailio
- Subsystem
- tm module
- Deployment
- on-premises
- Region
- not restricted
- Release range
- stable docs as of 2026-10-02
- Checked
- 2026-10-02
Sources
- TM Module — Kamailio project · tier 3 vendor-maintained repositories · Parameter fr_timer
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting SIP 408 Request Timeout and calls that get no response: source note sip-408-timeout-troubleshooting-kamailio-fr-timer-408. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-408-timeout-troubleshooting-kamailio-fr-timer-408
BibTeX
@misc{warmtransfer-claim-sip-408-timeout-troubleshooting-kamailio-fr-timer-408,
title = {Troubleshooting SIP 408 Request Timeout and calls that get no response: source note sip-408-timeout-troubleshooting-kamailio-fr-timer-408},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-408-timeout-troubleshooting-kamailio-fr-timer-408},
note = {Source note sip-408-timeout-troubleshooting-kamailio-fr-timer-408, checked 2026-10-02}
}