Cisco Systems CP7921GAK9RF manual If you want to Then

Advanced Call Handling

Your phone can support these types of calls:

•Authenticated call—The identities of all phones participating in the call have been verified.

•Encrypted call—The phone is receiving and transmitting encrypted audio (your conversation) within the Cisco IP network. Encrypted calls are also authenticated.

•Protected call—The phone is receiving and transmitting encrypted audio (your conversation) with another phone. A protected call provides a similar level of security as an encrypted call, but adds additional security. If the call is protected at both ends, a security tone plays at the beginning of the conversation. 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.

•Non-securecall—At least one of the participating phones or the connection does not support these security features, or the phones cannot be verified.

If you want to...	Then...
Check the security level of a call	Look for a security icon in the top right corner of the call
	activity area, next to the call duration timer:
	Authenticated call or conference
	Encrypted call or conference
	Neither security icon appears if the call is non-secure.
Verify that the phone on the other	Look for the encrypted lock icon and listen for a security tone
end of the connection is also secure	at the beginning of a call.
	When encrypted calling is configured on your phone, the lock
	icon is displayed. However, the conversation is protected only
	when the security tone plays at the beginning of a call,
	indicating that the call is protected on both ends of the call. If
	your call is connected to a non-protected phone, the secure
	tone is not played.
Determine if secure calls can be	Contact your system administrator.
made in your company

Note There are interactions, restrictions, and limitations that affect how security features work on your phone. For more information, ask your system administrator.

Cisco Unified Wireless IP Phone 7921G Phone Guide for Cisco Unified Communications Manager 7.0 59