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Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP)
OL-23874-01
Chapter 1 An Overview of the Cisco Unified IP Phone
Understanding Security Features for Cisco Unified IP Phones
Related Topics
• Understanding Security Features for Cisco Unified IP Phones, page 1-10
• Identifying Authenticated, Encrypted, and Protected Phone Calls, page 1-15
Understanding Security Profiles
All Cisco Unified IP Phones that support Cisco Unified Communications Manager use a security profile,
which defines whether the phone is nonsecure, authenticated, or encrypted. For information about
configuring the security profile and applying the profile to the phone, refer to Cisco Unified
Communications Manager Security Guide.
To view the security mode that is set for the phone, you can view the security profile in Cisco Unified
Communications Manager Administration.
Related Topics
• Identifying Authenticated, Encrypted, and Protected Phone Calls, page 1-15
Identifying 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 Cisco
Unified Communications Manager.
In an encrypted call, all devices participating in the establishment of the call are trusted devices, and
authenticated by Cisco
Unified 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 Protected calling is supported for connections between two phones only. Some features, such as
conference calling and shared lines are not available when protected calling is configured. Protected
calls are not authenticated.
Max MOS LQK Baseline or highest MOS LQK score from the start of the voice stream.
The following codecs provide the corresponding maximum MOS LQK scores under
normal conditions with no frame loss:
• G.711: 4.5
• G.728/iLBC: 3.9
• G729A/AB: 3.7
MOS LQK Version Version of the Cisco-proprietary algorithm used to calculate the MOS LQK scores.
Table 1-5 Overview of Security Features (continued)
Feature Description