Source note · Calls that drop after about 30 seconds
Asterisk res_pjsip uses a default Timer B of 32000 ms (32 seconds), which is 64 times its 500 ms default T1.
Checked 2026-09-25
- Vendor
- Sangoma
- Product
- Asterisk res_pjsip
- Subsystem
- system timers
- Deployment
- on-premises
- Region
- not restricted
- Release range
- master branch as of 2026-09-25
- Checked
- 2026-09-25
Sources
- asterisk/res/res_pjsip/config_system.c — Sangoma / Asterisk project (GitHub) · tier 3 vendor-maintained repositories · res/res_pjsip/config_system.c, #define DEFAULT_TIMER_B
Cite this note
APA
WarmTransfer. (2026, September 25). Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-asterisk-timer-b-default. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-asterisk-timer-b-default
BibTeX
@misc{warmtransfer-claim-sip-calls-drop-30-seconds-asterisk-timer-b-default,
title = {Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-asterisk-timer-b-default},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-asterisk-timer-b-default},
note = {Source note sip-calls-drop-30-seconds-asterisk-timer-b-default, checked 2026-09-25}
}