Source note · Enabling mixed mode and encrypted calling in Unified CM
After enabling mixed mode all IP phones must be restarted so they obtain the CTL file from the Unified CM TFTP service.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- CTL
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 10.0(1) and later
- Checked
- 2026-09-30
Sources
- Migrate CUCM Mixed Mode with Tokenless CTL — Cisco Systems · tier 2 current vendor documentation · Configure > tokenless mixed mode steps
Cite this note
APA
WarmTransfer. (2026, September 30). Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-restart-phones-ctl. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-restart-phones-ctl
BibTeX
@misc{warmtransfer-claim-cucm-secure-calling-setup-restart-phones-ctl,
title = {Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-restart-phones-ctl},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-restart-phones-ctl},
note = {Source note cucm-secure-calling-setup-restart-phones-ctl, checked 2026-09-30}
}