Source note · Troubleshooting fax over IP failures
In Asterisk res_pjsip, T.38 UDPTL support on an endpoint is off by default (t38_udptl = no).
Checked 2026-10-02
- Vendor
- Sangoma
- Product
- Asterisk
- Subsystem
- res_pjsip
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Asterisk 21
- Checked
- 2026-10-02
Sources
- res_pjsip - Asterisk Documentation (Asterisk 21) — Sangoma / Asterisk project · tier 2 current vendor documentation · endpoint configuration option t38_udptl
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-asterisk-t38-off. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-asterisk-t38-off
BibTeX
@misc{warmtransfer-claim-fax-over-ip-troubleshooting-asterisk-t38-off,
title = {Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-asterisk-t38-off},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-asterisk-t38-off},
note = {Source note fax-over-ip-troubleshooting-asterisk-t38-off, checked 2026-10-02}
}