Establishing And Identifying Protected Calls; Call Security Interactions And Restrictions - Cisco 6901 Administration Manual

Chapter 1 An Overview of the Cisco Unified IP Phone
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Establishing and Identifying Protected Calls

A protected call is established when your phone and the phone on the other end are set up 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.
Protected calling is supported for conversations between two phones. Some features, such as conference
Note
calling and shared 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 security in the system.
Table 1-6
IP Phone 6901 and 6911.
Table 1-6 Call Security Interactions When Using Barge (Cisco Unified IP Phone 6911 only)
Initiator's Phone
Security Level Feature Used
Nonsecure cBarge
Secure (encrypted) cBarge
Secure cBarge
(authenticated)
Nonsecure cBarge
Table 1-7
phone security level, the security levels of participants, and the availability of secure conference bridges.
Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-24582-01
Understanding Security Features for Cisco Unified IP Phones, page 1-10
A user initiates the call from a protected phone (protected security mode).
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.
provides information about changes to call security levels when using Barge for Cisco Unified
Call Security Level
Encrypted call
Authenticated call
Encrypted call
Authenticated call
provides information about changes to conference security levels depending on the initiator's
Understanding Security Features for Cisco Unified IP Phones
Results of Action
Call barged and identified as nonsecure call
Call barged and identified as authenticated call
Call barged and identified as authenticated call
Call barged and identified as nonsecure call
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