Secure Phone Call Identification; Call Security Interactions And Restrictions - Cisco 8961 Administration Manual

Secure Phone Calls
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Secure Phone Call Identification

A secure call is established when your phone, and the phone on the other end, is configured for secure calling.
The other phone can be in the same Cisco IP network, or on a network outside the IP network. Secured calls
can only be made between two phones. Conference calls and other multiple-line calls are not supported.
A secured call is established using this process:
1 A user initiates the call from a secured phone (secured security mode).
2
The phone displays the secure icon
for secure calls, but this does not mean that the other connected phone is also secured.
3 A security tone plays 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 nonsecured phone, the secure tone does
not play.
Secured calling is supported for conversations between two phones. Some features, such as conference
Note
calling, shared lines, and Cisco Extension Mobility are not available when secured calling is configured.

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 4: Call Security Interactions when using Barge
Initiator phone
security level
Nonsecure
Secure
The following table provides information about changes to conference security levels depending on the initiator
phone security level, the security levels of participants, and the availability of secure conference bridges.
Table 5: Security Restrictions with Conference Calls
Initiator phone
security level
Nonsecure
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0 (SIP)
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on the phone screen. This icon indicates that the phone is configured
Feature used Call security level
Barge Encrypted call
Barge Encrypted call
Feature Security level of
used participants
Conference Secure
Cisco Unified IP Phone
Results of action
Call barged and identified as nonsecure call
Call barged and identified as secure call
Results of action
Nonsecure conference bridge
Nonsecure conference