In Asterisk res_pjsip, the system object exposes timer_t1 (initial SIP retransmission timer in ms) and timer_b (SIP INVITE transaction timeout in ms).
Checked 2026-10-02
- Vendor
- Sangoma
- Product
- Asterisk
- Subsystem
- res_pjsip system object
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Latest API docs (Asterisk 23) as of 2026-10-02
- Checked
- 2026-10-02
Sources
- res_pjsip - Asterisk Documentation — Sangoma / Asterisk project · tier 3 vendor-maintained repositories · Configuration object 'system', options timer_t1 and timer_b
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-asterisk-timer-b-option. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-408-timeout-troubleshooting-asterisk-timer-b-option
BibTeX
@misc{warmtransfer-claim-sip-408-timeout-troubleshooting-asterisk-timer-b-option,
title = {Troubleshooting SIP 408 Request Timeout and calls that get no response: source note sip-408-timeout-troubleshooting-asterisk-timer-b-option},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-408-timeout-troubleshooting-asterisk-timer-b-option},
note = {Source note sip-408-timeout-troubleshooting-asterisk-timer-b-option, checked 2026-10-02}
}