During the transition the Unified CM dial plan must support +E.164 dialing to Webex Calling and extension dialing to Webex Calling, intra-site and also inter-site when extension ranges are unique.
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
- 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 (bulleted list of transition requirements)
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-ucm-e164-and-ext-dialing. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-ucm-e164-and-ext-dialing
BibTeX
@misc{warmtransfer-claim-cucm-webex-calling-coexistence-ucm-e164-and-ext-dialing,
title = {Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-ucm-e164-and-ext-dialing},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-ucm-e164-and-ext-dialing},
note = {Source note cucm-webex-calling-coexistence-ucm-e164-and-ext-dialing, checked 2026-09-24}
}