Source note · Fax and T.38 in cloud calling
Zoom's Poly OBi fax setup for Zoom Phone sets T38Enable to Disabled and FaxPassThroughCodec to G711U (North America) or G711A so fax uses G.711 passthrough rather than T.38.
Checked 2026-09-24
- Vendor
- Zoom
- Product
- Zoom Phone
- Subsystem
- ATA fax
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Setting up faxing (Poly OBi series ATA) — Zoom · tier 2 current vendor documentation · Codec settings step
Cite this note
APA
WarmTransfer. (2026, September 24). Fax and T.38 in cloud calling: source note fax-t38-zoom-obi-passthrough. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-t38-zoom-obi-passthrough
BibTeX
@misc{warmtransfer-claim-fax-t38-zoom-obi-passthrough,
title = {Fax and T.38 in cloud calling: source note fax-t38-zoom-obi-passthrough},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-t38-zoom-obi-passthrough},
note = {Source note fax-t38-zoom-obi-passthrough, checked 2026-09-24}
}