Source note · SIP trunk redundancy and failover design
Twilio fails over to another origination URI when there is no SIP response after 4 seconds; responses 2xx, 400, 404, 405, 410, 416, 482, 484, 486 and 6xx do not trigger failover.
Checked 2026-09-25
- Vendor
- Twilio
- Product
- Elastic SIP Trunking
- Subsystem
- origination failover
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Elastic SIP Trunking — Twilio · tier 2 current vendor documentation · Origination failover behaviour
Cite this note
APA
WarmTransfer. (2026, September 25). SIP trunk redundancy and failover design: source note sip-trunk-redundancy-design-twilio-failover-trigger. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-redundancy-design-twilio-failover-trigger
BibTeX
@misc{warmtransfer-claim-sip-trunk-redundancy-design-twilio-failover-trigger,
title = {SIP trunk redundancy and failover design: source note sip-trunk-redundancy-design-twilio-failover-trigger},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-redundancy-design-twilio-failover-trigger},
note = {Source note sip-trunk-redundancy-design-twilio-failover-trigger, checked 2026-09-25}
}