Because a Unified CM directory number out-matches the wildcarded Webex Calling route pattern, a migrated user's number left configured on Unified CM would likely keep calls from Unified CM callers on Unified CM instead of reaching the user on Webex Calling.
inferred · Checked 2026-09-24
- Vendor
- Cisco
- Product
- Unified CM
- Subsystem
- dial plan
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Status
- inferred
- 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 · Design to migrate > On-premises dial plan in Unified CM (best match paragraph); combined with Implement > post-migration step to disable/delete DNs on Unified CM
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-stale-dn-inference. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-stale-dn-inference
BibTeX
@misc{warmtransfer-claim-cucm-webex-calling-coexistence-stale-dn-inference,
title = {Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-stale-dn-inference},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-stale-dn-inference},
note = {Source note cucm-webex-calling-coexistence-stale-dn-inference, checked 2026-09-24}
}