McDewey

C H A P T E R 14 Secure Tones and Icons • Secure Tones and Icons Overview, on page 173 • Secure Icons and Tones Tips , on page 175 • Secure Icons and Tones Configuration Tasks, on page 177 • Secure Calls and Tones Limitations and Restrictions , on page 179 Secure Tones and Icons Overview Secure Icons and Secure Tone provide audio and visual indicators that alert you as to the security status of a call. Both of these features alert call participants of the security level of a call, so that participants know whether it’s safe to exchange confidential information. • Secure Icons—Refers to an icon that displays on the phone to indicate the level of security for a call. • Secure Tones—Refers to a 2-second tone that plays at the start of a call to indicate whether the call is secure or non-secure. Secure Icons Security icons provide a visual indicator that appears on the phone display, letting you know whether a call is secure or nonsecure. The icon appears on the phone right next to the call duration timer. The following table displays the security icons along with a description of its meaning: Table 29: Secure Icons Description Security Level Security Icon Both call signaling (with TLS) and call media (with SRTP) are encrypted. Note It’s always required that the audio stream be encrypted in order for the Encryption icon to display on the phone. Encryption for additional media streams (video, BFCP and iX channel) may be required depending on how you configure the Call Secure Status Policy parameter. The default value is that the media is considered encrypted so long as the audio and video streams are both encrypted. Encrypted Call Lock Security Guide for Cisco Unified Communications Manager, Release 15 and SUs 173