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Identifying Secure (Encrypted) Phone Calls

Establishing and Identifying Secure Calls

A secure call is established when your Cisco Cius and a phone on the other end are configured for secure

calling. They can be in the same Cisco IP network, or on a network outside the IP network. A secure conference

call is established by using this process:

1 A user initiates the call from a secured Cisco Cius (Encrypted security mode).

2 Cisco Cius indicates the Encrypted status on the Enterprise security menu. This status indicates that Cisco

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

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

conversation are encrypted and secured. Otherwise, nonsecure tone will be played.

Note

Secure tone is played only when enabled on Cisco Unified Communications Manager. If disabled on Cisco

Unified Communications Manager, no secure tone will be played even the call is secure. For more

information, see the Configuring Secure and Nonsecure Indication Tones chapter of the Cisco Unified

Communications Manager Security Guide.

Establishing and Identifying Secure Conference Calls

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 Cisco Cius device.

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

device and maintains the secure level for the conference.

4 Cisco Cius indicates the security level of the conference call.

Various interactions, restrictions, and limitations affect the security level of the conference call, depending

Note

on the security mode of the participant devices and the availability of secure conference bridges. Cisco

Cius supports secure audio conference calls only; video will not be secure.

Call Security Interactions and Restrictions

Cisco Unified Communications Manager checks the Cisco Cius security status when conferences are established

and changes the security indication for the conference or blocks completion of the call to maintain integrity

Cisco Cius Administration Guide, Release 9.2(3)

Overview of Cisco Cius

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