Secure Phone Call Identification - Cisco 9971 Administration Manual

Supported Security Features
The following table provides information about changes to conference security levels depending on the initiator
phone security level, the security levels of participants, and the availability of secure conference bridges.
Table 19: Security Restrictions with Conference Calls
Initiator phone
security level
Nonsecure
Secure
Secure
Nonsecure
Secure

Secure Phone Call Identification

A secure call is established when your phone, and the phone on the other end, is configured for secure calling.
The other phone can be in the same Cisco IP network, or on a network outside the IP network. Secured calls
can only be made between two phones. Conference calls should support secure call after secure conference
bridge set up.
A secured call is established using this process:
1 A user initiates the call from a secured phone (secured security mode).
2
The phone displays the secure icon
for secure calls, but this does not mean that the other connected phone is also secured.
3 The user hears a security tone if the call connects to another secured phone, indicating that both ends of
the conversation are encrypted and secured. If the call connects to a nonsecure phone, the user does not
hear the security tone.
Note Secure calling is supported between two phones. For protected phones, some features, such as conference
calling, shared lines, and Extension Mobility, are not available when secure calling is configured.
Only protected phones play these secure or nonsecure indication tones. Nonprotected phones never play tones.
If the overall call status changes during the call, the indication tone changes and the protected phone plays
the appropriate tone.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0
166
Feature Security level of
used participants
Conference Secure
Conference At least one member is
nonsecure.
Conference Secure
Meet Me Minimum security level is
encrypted.
Meet Me Minimum security level is
nonsecure.
on the phone screen. This icon indicates that the phone is configured
Results of action
Nonsecure conference bridge
Nonsecure conference
Secure conference bridge
Nonsecure conference
Secure conference bridge
Secure encrypted level conference
Initiator receives message Does not meet
Security Level, call rejected.
Secure conference bridge
Conference accepts all calls.