Establishing And Identifying Protected Calls; Call Security Interactions And Restrictions - Cisco 7975G Software Manual

Understanding Security Features for Cisco Unified IP Phones
4.
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

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.
2.
3.
Protected calling is supported for conversations between two phones. Some features, such as conference
Note
calling, shared lines, Extension Mobility, and Join Across Lines are not available when protected 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 1-4 Call Security Interactions When Using Barge
Initiator's Phone
Security Level
Non-secure
Secure (encrypted)
Secure (authenticated)
Non-secure
Table 1-5
phone security level, the security levels of participants, and the availability of secure conference bridges.
Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP and SIP)
1-14
The phone displays the security level of the conference call. A secure conference displays
( (
encrypted) or authenticated) icon to the right of "Conference" on the phone screen. If
displays, the conference is not secure.
Table 1-4 and Table 1-5
A user initiates the call from a protected phone (protected security mode).
The phone displays the
is configured for secure (encrypted) calls, but this does not mean that the other connected phone is
also protected.
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.
Feature Used Call Security Level
Barge Encrypted call
Barge Authenticated call
Barge Encrypted call
Barge Authenticated call
provides information about changes to conference security levels depending on the initiator's
for information about these interactions.
icon ( encrypted) on the phone screen. This icon indicates that the phone
Table 1-4
Results of Action
Call barged and identified as non-secure call
Call barged and identified as authenticated call
Call barged and identified as authenticated call
Call barged and identified as non-secure call
Chapter 1 An Overview of the Cisco Unified IP Phone
provides information about changes to
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