Authenticated, Encrypted, And Protected Phone Calls; Call Security Interactions And Restrictions - Cisco 6901 Administration Manual

Authenticated, Encrypted, and Protected Phone Calls

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Authenticated, Encrypted, and Protected Phone Calls
In an authenticated call, all devices participating in the establishment of the call are trusted devices, and
authenticated by CiscoUnified Communications Manager.
In an encrypted call, all devices participating in the establishment of the call are trusted devices, and
authenticated by CiscoUnified Communications Manager. In addition, call signaling and media streams are
encrypted. An encrypted call offers a high level of security, providing integrity and privacy to the call.
If the call is routed through non-IP call legs, for example, PSTN, the call may be nonsecure even though it is
encrypted within the IP network.
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 and video (if video is involved). If your call is connected
to a non-protected phone, the security tone does not play.
Note
Related Topics
Identify Protected Calls
A protected call establishes 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 do not support protected
calls.
A protected call establishes using this process:
1. A user initiates the call from a protected phone (protected security mode).
2. A security tone plays if the call connects to another protected phone, indicating that both ends of the
conversation are encrypted and protected. If the call connects to a non protected phone, then the secure
tone does not play.
Note

Call Security Interactions and Restrictions

Cisco Unified Communications Manager checks the phone security status when conferences establish and
changes the security indication for the conference or blocks the completion of the call to maintain integrity
and security in the system.
Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 10.0 (SCCP and SIP)
18
Authenticated, Encrypted, and Protected Phone
Connections between two phones support protected calling. Some features, such as conference calling and
shared lines, are not available when protected calling is configured. Protected calls are not authenticated.
Cisco Unified IP Phones Security
Connections between two phones support protected calling. Some features, such as conference calling and
shared lines are not available when protected calling is configured.
Calls, on page 18
Features, on page 14
Cisco Unified IP Phone