Cisco Systems 6921 manual Establishing and Identifying Secure Conference Calls

Chapter

Understanding Security Features for Cisco Unified IP Phones

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 encrypted audio and video (if video is involved). If your call is connected to a non-protected phone, the security tone does not play.

Note Secured calling is supported for connections between two phones only. Some features, such as conference calling, shared lines, Cisco Extension Mobility, and Join Across Lines are not available when secured calling is configured.

Related Topic

•Understanding Security Profiles, page 1-18

•Understanding Security Features for Cisco Unified IP Phones, page 1-14

•Security Restrictions, page 1-22

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 using this process:

1.A user initiates the conference from a secure phone.

2.Cisco Unified CM assigns a secure conference bridge to the call.

3.As participants are added, Cisco Unified CM verifies the security mode of each phone and maintains the secure level for the conference.

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

to the right of “Conference” on the phone screen.

Note There are interactions, restrictions, and limitations that affect the security level of the conference call depending on the security mode of the participant’s phones and the availability of secure conference bridges. See Table 1-7and Table 1-8for information about these interactions.

Establishing and Identifying Protected Calls

A protected call is established when your phone, and the phone on the other end, is configured for protected calling. The other phone can be in the same Cisco IP network, or on a network outside the IP network. Protected calls can only be made between two phones. Conference calls and other multiple-line calls are not supported.

A protected call is established using this process:

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

2.The phone displays the icon (encrypted) on the phone screen. This icon indicates that the phone is configured for secure (encrypted) calls, but this does not mean that the other connected phone is also protected.

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 non-protected phone, then the secure tone is not played.

Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP)

OL-23769-01 1-19