Cisco says moving PSTN to a Cloud Connected PSTN provider at the start while keeping Unified CM during a phased migration adds complexity and risk, particularly in adapting existing Unified CM call routing.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- PSTN
- Deployment
- on-premises, multi-tenant
- 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 > PSTN
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-ccpp-at-start-risk. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-ccpp-at-start-risk
BibTeX
@misc{warmtransfer-claim-cucm-webex-calling-coexistence-ccpp-at-start-risk,
title = {Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-ccpp-at-start-risk},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-ccpp-at-start-risk},
note = {Source note cucm-webex-calling-coexistence-ccpp-at-start-risk, checked 2026-09-24}
}