Source note · Fax and T.38 in cloud calling
Cisco's fix for the Webex Calling T.38 ReINVITE 488 error is to set the fax user's or workspace's Call Experience compression to Normal compression in Control Hub on the Calling tab.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- Control Hub call experience
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- as of 2024-07-18
- Checked
- 2026-09-24
Sources
- Fix 488 SIP Error for Fax T.38 ReINVITE Rejected by Webex Calling — Cisco · tier 2 current vendor documentation · Solution section; steps 1 to 5
Cite this note
APA
WarmTransfer. (2026, September 24). Fax and T.38 in cloud calling: source note fax-t38-wxc-488-normal-compression. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-t38-wxc-488-normal-compression
BibTeX
@misc{warmtransfer-claim-fax-t38-wxc-488-normal-compression,
title = {Fax and T.38 in cloud calling: source note fax-t38-wxc-488-normal-compression},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/fax-t38-wxc-488-normal-compression},
note = {Source note fax-t38-wxc-488-normal-compression, checked 2026-09-24}
}