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Understanding Security Features for Cisco Unified IP Phones

There are interactions, restrictions, and limitations that affect the security level of the conference call

Note

depending on the security mode of the participant's phones and the availability of secure conference

bridges. See

Establishing and Identifying Secure Calls

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:

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 also security in the system.

call security levels when using Barge.

Table 1-7

Call Security Interactions When Using Barge

Initiator's Phone

Security Level

Feature Used

Non-secure

Barge

Secure

Barge

Table 1-8

phone security level, the security levels of participants, and the availability of secure conference bridges.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)

1-20

The phone displays the security level of the conference call. A secure conference displays

to the right of "Conference" on the phone screen.

Table 1-7

and

Table 1-8

A user initiates the call from a secured phone (secured security mode).

The phone displays the

configured for secure calls, but this does not mean that the other connected phone is also secured.

A security tone plays if the call is connected to another secured phone, indicating that both ends of

the conversation are encrypted and secured. If the call is connected to a non-secured phone, then the

secure tone is not played.

Call Security Level

Encrypted call

provides information about changes to conference security levels depending on the initiator's

Chapter 1

for information about these interactions.

icon ( secure) on the phone screen. This icon indicates that the phone is

Table 1-7

Results of Action

Call barged and identified as non-secure call

Call barged and identified as secure call

An Overview of the Cisco Unified IP Phone

provides information about changes to

icon

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