Migrating PSTN per location brings number-porting challenges: coordinating port orders precisely, possible delays, and provider caps on the number of concurrent port requests.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- PSTN
- Deployment
- 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 · PSTN section, PSTN strategy
Cite this note
APA
WarmTransfer. (2026, September 24). Building a hybrid Unified CM and Webex Calling environment for a phased migration: source note cucm-webex-calling-hybrid-build-per-site-port-risk. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-calling-hybrid-build-per-site-port-risk
BibTeX
@misc{warmtransfer-claim-cucm-webex-calling-hybrid-build-per-site-port-risk,
title = {Building a hybrid Unified CM and Webex Calling environment for a phased migration: source note cucm-webex-calling-hybrid-build-per-site-port-risk},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-calling-hybrid-build-per-site-port-risk},
note = {Source note cucm-webex-calling-hybrid-build-per-site-port-risk, checked 2026-09-24}
}