Call Security Interactions And Restrictions - Cisco 6921 Administration Manual

Chapter 1 An Overview of the Cisco Unified IP Phone
3.
Note Protected calling is supported for conversations between two phones. Some features, such as conference
calling, shared lines, Cisco Extension Mobility, and Join Across Lines are not available when protected
calling is configured.

Call Security Interactions and Restrictions

Cisco Unified CM 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.
using Barge.
Table 1-7
Initiator's Phone
Security Level
Non-secure
Secure
Table 1-8
phone security level, the security levels of participants, and the availability of secure conference bridges.
Table 1-8
Initiator's Phone
Security Level
Non-secure
Secure
Secure
Secure
Non-secure
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP)
OL-20851-01
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.
Table 1-7
Call Security Interactions When Using Barge
Feature Used
Barge
Barge
provides information about changes to conference security levels depending on the initiator's
Security Restrictions with Conference Calls
Feature Used
Conference
Conference
Conference
Join
cBarge
Understanding Security Features for Cisco Unified IP Phones
provides information about changes to call security levels when
Call Security Level Results of Action
Encrypted call Call barged and identified as nonsecure call
Secure call Call barged and identified as Secure call
Security Level of Participants
Encrypted
At least one member is
non-secure
All participants are encrypted
Encrypted
All participants are encrypted
Results of Action
Nonsecure conference bridge
Nonsecure conference
Secure conference bridge
Nonsecure conference
Secure conference bridge
Secure encrypted level
conference
Secure conference bridge
Conference remains secure
Secure conference bridge
Conference changes to
non-secure
1-19