Call Security Interactions And Restrictions - Cisco 8831 Administration Manual

Encrypted phone call identification
Procedure
Step 1 A user initiates the call from a protected phone (protected security mode).
Step 2
The phone displays the
configured for secure (encrypted) calls, but this does not mean that the other connected phone is also protected.
Step 3 A security tone plays if the call is connected to another protected phone, indicating that both ends of the
conversation are encrypted and protected. If the call is connected to a unprotected phone, then the secure tone
does not play.
Note

Call security interactions and restrictions

Cisco Unified Communications Manager checks the phone security status when conferences are established
and changes the security indication for the conference or blocks the completion of the call to maintain integrity
and security in the system. The following table provides information about changes to call security levels
when using Barge.
Table 9: Call security interactions when using Barge
Initiator's phone
security level
Nonsecure
Secure
The following table provides information about changes to conference security levels depending on the
initiator's phone security level, the security levels of participants, and the availability of secure conference
bridges.
Table 10: Security restrictions with conference calls
Initiator's phone
security level
Nonsecure
Secure
Cisco Unified IP Conference Phone 8831 Administration Guide for Cisco Unified Communications Manager
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icon (encrypted) on the phone screen. This icon indicates that the phone is
Protected calling is supported for conversations between two phones. Some features, such as conference
calling and Cisco Extension Mobility are not available when protected calling is configured.
Feature used
cBarge
cBarge
Feature used
Conference
Conference
Call security level Results of action
Encrypted call Call barged and identified as nonsecure call
Secure call Call barged and identified as Secure call
Security level of participants
Encrypted
At least one member is
nonsecure.
Cisco Unified IP Conference Phone 8831
Results of action
Nonsecure conference bridge
Nonsecure conference
Secure conference bridge
Nonsecure conference