Phone Call Security; Secure Conference Call Identification - Cisco 7800 Series Administration Manual

Phone Call Security

Phone Call Security
When security is implemented for a phone, you can identify secure phone calls by icons on the phone screen.
You can also determine whether the connected phone is secure and protected if a security tone plays at the
beginning of the call.
In a secure call, all call signaling and media streams are encrypted. A secure call offers a high level of security,
providing integrity and privacy to the call. When a call in progress is encrypted, the call progress icon to the
right of the call duration timer in the phone screen changes to the following icon:
Note
If the call is routed through non-IP call legs, for example, PSTN, the call may be nonsecure even though it is
encrypted within the IP network and has a lock icon associated with it.
In a secure call, a security tone plays at the beginning of a call to indicate that the other connected phone is
also receiving and transmitting secure audio. If your call connects to a nonsecure phone, the security tone
does not play.
Note
Secure calling is supported between two phones. Secure conference, Cisco Extension Mobility, and shared
lines can be configured by a secure conference bridge.
When a phone is configured as secure (encrypted and trusted) in Cisco Unified Communications Manager, it
can be given a "protected" status. After that, if desired, the protected phone can be configured to play an
indication tone at the beginning of a call:
• Protected Device: To change the status of a secure phone to protected, check the Protected Device check
• Play Secure Indication Tone: To enable the protected phone to play a secure or nonsecure indication

Secure Conference Call Identification

You can initiate a secure conference call and monitor the security level of participants. A secure conference
call is established by 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.
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box in the Phone Configuration window in Cisco Unified Communications Manager Administration
(Device > Phone).
tone, set the Play Secure Indication Tone setting to True. By default, Play Secure Indication Tone is set
to False. You set this option in Cisco Unified Communications Manager Administration (System >
Service Parameters). Select the server and then the Unified Communications Manager service. In the
Service Parameter Configuration window, select the option in the Feature - Secure Tone area. The default
is False.
Cisco IP Phone Administration
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