Source note · CUCM to Webex Calling migration
The Cisco 9800 series runs PhoneOS, which supports registration to both Unified CM and Webex Calling, so 9800 phones transition without a firmware conversion.
Checked 2026-09-04
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- device support
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-04
- Checked
- 2026-09-04
Sources
- Transitioning from Unified CM to Webex Calling — Deployment Guide — Cisco Systems, Inc. (CTG TME) · tier 2 current vendor documentation · Desk Phones
Cite this note
APA
WarmTransfer. (2026, September 4). CUCM to Webex Calling migration: source note wxc-dev-9800-phoneos-no-firmware-change. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxc-dev-9800-phoneos-no-firmware-change
BibTeX
@misc{warmtransfer-claim-wxc-dev-9800-phoneos-no-firmware-change,
title = {CUCM to Webex Calling migration: source note wxc-dev-9800-phoneos-no-firmware-change},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxc-dev-9800-phoneos-no-firmware-change},
note = {Source note wxc-dev-9800-phoneos-no-firmware-change, checked 2026-09-04}
}