Cisco's design guidance says to set the maximum unknown extension length in Webex Calling so that calls from on-premises call control into Webex Calling are classified correctly.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- dial plan / premises routing
- Deployment
- hybrid
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Design to migrate from Unified CM to Webex Calling — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Webex Calling dial plan
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM dial plan partitions and calling search spaces: source note cucm-dial-plan-wxc-max-unknown-ext. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-dial-plan-wxc-max-unknown-ext
BibTeX
@misc{warmtransfer-claim-cucm-dial-plan-wxc-max-unknown-ext,
title = {Unified CM dial plan partitions and calling search spaces: source note cucm-dial-plan-wxc-max-unknown-ext},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-dial-plan-wxc-max-unknown-ext},
note = {Source note cucm-dial-plan-wxc-max-unknown-ext, checked 2026-09-24}
}