For unknown-extension handling, Standard Behavior is the default and recommended option for PBX interoperability, while Legacy Behavior exists for backward compatibility and is not recommended when dial plans are configured.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- dial plan
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Configure trunks, route groups, and dial plans for Webex Calling — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Configure trunks, route groups, and dial plans > Calls to On-Premises Extensions
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-standard-behaviour. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-standard-behaviour
BibTeX
@misc{warmtransfer-claim-cucm-webex-calling-coexistence-standard-behaviour,
title = {Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-standard-behaviour},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-standard-behaviour},
note = {Source note cucm-webex-calling-coexistence-standard-behaviour, checked 2026-09-24}
}