Source note · Troubleshooting fax over IP failures
For fax, Cisco recommends the ATA 191 Multiplatform line use G.711u (USA) or G.711a (elsewhere) as preferred codec with Use pref. codec only set to Yes, and silence suppression and echo cancellation off.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco ATA 191 Multiplatform
- Subsystem
- fax settings
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
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
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-ata-mpp-g711-only. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-ata-mpp-g711-only
BibTeX
@misc{warmtransfer-claim-fax-over-ip-troubleshooting-ata-mpp-g711-only,
title = {Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-ata-mpp-g711-only},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-ata-mpp-g711-only},
note = {Source note fax-over-ip-troubleshooting-ata-mpp-g711-only, checked 2026-10-02}
}