Source note · Troubleshooting fax over IP failures
show call active fax brief identifies which dial peers a fax call matched, and show voice dsp confirms whether the fax codec loaded in the DSPs.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco IOS voice gateways
- Subsystem
- diagnostics
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Troubleshoot Fax Relay — Cisco Systems · tier 2 current vendor documentation · Verify / show commands section
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-show-call-active-fax. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-show-call-active-fax
BibTeX
@misc{warmtransfer-claim-fax-over-ip-troubleshooting-show-call-active-fax,
title = {Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-show-call-active-fax},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-show-call-active-fax},
note = {Source note fax-over-ip-troubleshooting-show-call-active-fax, checked 2026-10-02}
}