Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Secure Tones and Icons

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/15_0/cucm_b_security-guide-release-15/cucm_m_secure-tones-and-icons_reorg.html

Published

2026-09-22

Updated

unknown

Accessed

2026-09-30

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• The lock icon on a phone means both call signaling (TLS) and call media (SRTP) are encrypted. in context
• 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. in context
• Secure tones play only on phones configured as protected devices: three long beeps indicate a secure call and six short beeps a non-secure call. in context

Cite this source record

APA

WarmTransfer. (2026, September 22). Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Secure Tones and Icons. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-sec15-secure-tones-icons

BibTeX

@misc{warmtransfer-cisco-cucm-sec15-secure-tones-icons,
  title  = {Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Secure Tones and Icons},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-sec15-secure-tones-icons},
  note   = {Cisco Systems, accessed 2026-09-30}
}