If the Unified CM Top Level Domain enterprise parameter is not set, inbound B2B calls to the organisation's own domain can loop via SIP route patterns or fail with 404 Not Found.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified CM
- Subsystem
- enterprise parameters
- Deployment
- on-premises
- Region
- not restricted
- Release range
- written against X8.x era; not re-validated
- Checked
- 2026-09-25
Sources
- Troubleshoot Most Common Issues for Business to Business Calls Through Expressway — Cisco Systems · tier 2 current vendor documentation · Issue: Top Level Domain not configured
Cite this note
APA
WarmTransfer. (2026, September 25). Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-cucm-top-level-domain. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-cucm-top-level-domain
BibTeX
@misc{warmtransfer-claim-expressway-b2b-setup-cucm-top-level-domain,
title = {Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-cucm-top-level-domain},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-cucm-top-level-domain},
note = {Source note expressway-b2b-setup-cucm-top-level-domain, checked 2026-09-25}
}