Cisco 7961G - Cisco IP Phone 7961 G;7961 G-GE and 7941 G;7941 G-GE

Chapter 1 An Overview of the Cisco IP Phone
Understanding the Requirements for Installing and Configuring the Cisco IP Phone 7961G/7961G-GE and
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Cisco IP Phone Administration Guide for Cisco CallManager, Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE
OL-6966-01
If the initiator phone is configured for encryption, the barge initiator can barge
into an authenticated or nonsecure call from the encrypted phone. After the barge
occurs, Cisco CallManager classifies the call as nonsecure.
If the initiator phone is configured for encryption, the barge initiator can barge
into an encrypted call, and the phone indicates that the call is encrypted.
A user can barge into an authenticated call, even if the phone that is used to barge
is nonsecure. The authentication icon continues to appear on the authenticated
devices in the call, even if the initiator phone does not support security.
Understanding the Requirements for Installing and
Configuring the Cisco IP Phone 7961G/7961G-GE and
7941G/7941G-GE
To install and configure the Cisco IP Phone, you must configure some network
settings, set up Cisco CallManager, and make changes on the phone.
See Table 1-3 for an overview of required procedures. For detailed information
about these steps, refer to the sources shown.