Source note · Enabling mixed mode and encrypted calling in Unified CM
The shield icon on a phone means call signaling is encrypted with TLS while call media is unencrypted or only partially encrypted; some phone models show only the lock icon and never the shield.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- secure icons
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15 and SUs
- Checked
- 2026-09-30
Sources
- Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Secure Tones and Icons — Cisco Systems · tier 2 current vendor documentation · Secure Tones and Icons > Secure icons
Cite this note
APA
WarmTransfer. (2026, September 30). Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-icon-shield. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-icon-shield
BibTeX
@misc{warmtransfer-claim-cucm-secure-calling-setup-icon-shield,
title = {Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-icon-shield},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-icon-shield},
note = {Source note cucm-secure-calling-setup-icon-shield, checked 2026-09-30}
}