Source note · Troubleshooting fax over IP failures
For fax, Cisco recommends setting Network Jitter Level to very high and Jitter Buffer Adjustment to no on the ATA 191 Multiplatform, and disabling call waiting and three-way calling on the fax line.
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-jitter-high. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-ata-mpp-jitter-high
BibTeX
@misc{warmtransfer-claim-fax-over-ip-troubleshooting-ata-mpp-jitter-high,
title = {Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-ata-mpp-jitter-high},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-ata-mpp-jitter-high},
note = {Source note fax-over-ip-troubleshooting-ata-mpp-jitter-high, checked 2026-10-02}
}