Source note · Fax and T.38 in cloud calling
On Cisco ATA 191/192 multiplatform firmware if a T.38 call cannot be set up the call automatically reverts to G.711 fallback.
Checked 2026-09-24
If a T.38 call cannot be set up, then the call automatically reverts to G.711 fallback.
- Vendor
- Cisco
- Product
- ATA 191
- Subsystem
- fax optimisation
- Deployment
- on-premises, multi-tenant
- Region
- not restricted
- Release range
- guide revision of 2026-01-30
- Checked
- 2026-09-24
Sources
- Cisco ATA 191 and ATA 192 Analog Telephone Adapter Administration Guide for Multiplatform Firmware - Advanced Options for Phone Services — Cisco · tier 2 current vendor documentation · Optimize Fax Completion Rates section
Cite this note
APA
WarmTransfer. (2026, September 24). Fax and T.38 in cloud calling: source note fax-t38-ata19x-g711-fallback. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-t38-ata19x-g711-fallback
BibTeX
@misc{warmtransfer-claim-fax-t38-ata19x-g711-fallback,
title = {Fax and T.38 in cloud calling: source note fax-t38-ata19x-g711-fallback},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-t38-ata19x-g711-fallback},
note = {Source note fax-t38-ata19x-g711-fallback, checked 2026-09-24}
}