Twilio sends originating SIP requests over UDP by default, and a transport parameter such as ;transport=tcp or ;transport=tls on the origination URI selects another transport.
Checked 2026-09-24
By default, Twilio sends originating SIP requests towards your communications infrastructure over UDP.
- Vendor
- Twilio
- Product
- Elastic SIP Trunking
- Subsystem
- origination
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Elastic SIP Trunking — Twilio · tier 2 current vendor documentation · Origination > Origination SIP URI (transport parameter)
Cite this note
APA
WarmTransfer. (2026, September 24). Setting up an Asterisk PBX with Twilio Elastic SIP Trunking: source note asterisk-twilio-pbx-setup-origination-default-udp. WarmTransfer. https://warmtransfer.net/knowledge/claims/asterisk-twilio-pbx-setup-origination-default-udp
BibTeX
@misc{warmtransfer-claim-asterisk-twilio-pbx-setup-origination-default-udp,
title = {Setting up an Asterisk PBX with Twilio Elastic SIP Trunking: source note asterisk-twilio-pbx-setup-origination-default-udp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/asterisk-twilio-pbx-setup-origination-default-udp},
note = {Source note asterisk-twilio-pbx-setup-origination-default-udp, checked 2026-09-24}
}