Specifications

1-9
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Chapter 1 An Overview of the Cisco Unified Wireless IP Phone 7921G
Understanding Security Features for Cisco Unified IP Phones
From this site, you can view additional phone documentation. For complete
ordering information, see the “Obtaining Documentation” section on page xviii.
In addition to providing documentation, it is important to inform users about
available Cisco
Unified IP Phone features—including features specific to your
company or network—and about how to access and customize those features, if
appropriate.
For a summary of the key information that you can provide to phone users, see
Appendix A, “Providing Information to Users By Using a Website.”
Note The radio frequency (RF) for the Cisco Unified Wireless IP Phone 7921G is
configured for a specific regulatory domain. If users attempt to use this phone
outside of the regulatory domain, the phone will not function properly and they
might violate local regulations.
Related Topic
Providing Information to Users By Using a Website, page A-1
Understanding Security Features for Cisco Unified
IP
Phones
Implementing security in the Cisco Unified CallManager system prevents identity
theft of the phone and Cisco
Unified CallManager server, and also prevents data,
call signaling, and media stream tampering.
To alleviate these threats, the Cisco IP telephony network establishes and
maintains authenticated and encrypted communication streams between a phone
and the server, digitally signs files before they are transferred to a phone, and
encrypts media streams and call signaling between Cisco
Unified IP phones.
Table 1-1 shows where you can find additional information about security in this
and other documents.