2
The phone displays the secure icon
on the phone screen. This icon indicates that the phone is configured
for secure calls, but this does not mean that the other connected phone is also secured.
3
The user hears a security tone if the call connects to another secured phone, indicating that both ends of
the conversation are encrypted and secured. If the call connects to a nonsecure phone, the user does not
hear the security tone.
Secure calling is supported between two phones. For protected phones, some features, such as conference
calling, shared lines, and Extension Mobility, are not available when secure calling is configured.
Note
Only protected phones play these secure or nonsecure indication tones. Nonprotected phones never play tones.
If the overall call status changes during the call, the indication tone changes and the protected phone plays
the appropriate tone.
A protected phone plays a tone or not under these circumstances:
•
When the Play Secure Indication Tone option is enabled:
◦
When end-to-end secure media is established and the call status is secure, the phone plays the
secure indication tone (three long beeps with pauses).
◦
When end-to-end nonsecure media is established and the call status is nonsecure, the phone plays
the nonsecure indication tone (six short beeps with brief pauses).
If the Play Secure Indication Tone option is disabled, no tone plays.
Secure calling is supported between two phones. For protected phones, some features, such as conference
calling, shared lines, and Extension Mobility, are not available when secure calling is configured.
Note
Secure Conference Call Identification
You can initiate a secure conference call and monitor the security level of participants. A secure conference
call is established using this process:
1
A user initiates the conference from a secure phone.
2
Cisco Unified Communications Manager assigns a secure conference bridge to the call.
3
As participants are added, Cisco Unified Communications Manager verifies the security mode of each
phone and maintains the secure level for the conference.
4
The phone displays the security level of the conference call. A secure conference displays the
to the
right of
Conference
on the phone screen.
There are interactions, restrictions, and limitations that affect the security level of the conference call
depending on the security mode of the participant phones and the availability of secure conference bridges.
Note
Cisco Unified IP Phone 8941 and 8945 Administration Guide for Cisco Unified Communications Manager 10.0 (SCCP
and SIP)
75
Supported Security Features
