Source note · Fax and T.38 in cloud calling
For fax on Cisco ATA 191 and 192 multiplatform firmware Cisco recommends G.711u (USA) or G.711a (elsewhere) as the preferred codec with silence suppression and echo cancellation disabled.
Checked 2026-09-24
- 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-no-vad. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-t38-ata19x-g711-no-vad
BibTeX
@misc{warmtransfer-claim-fax-t38-ata19x-g711-no-vad,
title = {Fax and T.38 in cloud calling: source note fax-t38-ata19x-g711-no-vad},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-t38-ata19x-g711-no-vad},
note = {Source note fax-t38-ata19x-g711-no-vad, checked 2026-09-24}
}