Cisco lists coexistence dial plan requirements for Unified CM. They include +E.164, extension and abbreviated inter-site dialing to Webex Calling, forced on-net dialing in both directions, call-back from missed-call directories, and PSTN routing that depends on the PSTN strategy.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Unified Communications Manager with Webex Calling
- Subsystem
- migration / coexistence dial plan
- 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 · On-premises dial plan in Unified CM (list of requirements)
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM dial plan partitions and calling search spaces: source note cucm-dial-plan-coexistence-requirements. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-dial-plan-coexistence-requirements
BibTeX
@misc{warmtransfer-claim-cucm-dial-plan-coexistence-requirements,
title = {Unified CM dial plan partitions and calling search spaces: source note cucm-dial-plan-coexistence-requirements},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-dial-plan-coexistence-requirements},
note = {Source note cucm-dial-plan-coexistence-requirements, checked 2026-09-24}
}