Establishing And Identifying Protected Calls; Security Restrictions - Cisco 7925G - Unified Wireless IP Phone VoIP Administration Manual

Chapter 1 Overview of the Cisco Unified Wireless IP Phone 7925G
If the call is routed through non-IP call legs, for example, PSTN, the call may be nonsecure even though
Note
it is encrypted within the IP network and has a lock icon associated with it.
In a protected 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. If your call is connected to a non-protected
phone, the security tone does not play.
Note Protected calling is supported for connections between two phones only. Some features, such as
conference calling, shared lines, Extension Mobility, and Join Across Lines are not available when
protected calling is configured. Protected calls are not authenticated.

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.
Related Topics
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Security Restrictions

When using a phone that is not configured for encryption, the user cannot barge into an encrypted call.
When barge fails in this case, a reorder tone (fast busy tone) plays on the barge initiator phone.
Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1)
OL-15984-01
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.
Understanding Security Features for Cisco Unified IP Phones, page 1-8
Understanding Security Profiles, page 1-12
Security Restrictions, page 1-13
Understanding Security Features for Cisco Unified IP Phones
icon ( encrypted) on the phone screen. This icon indicates that the phone
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