Specifications

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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
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Chapter 1 An Overview of the Cisco Unified IP Phone
Understanding Security Features for Cisco Unified IP Phones
Overview of Supported Security Features
Table 1-4 provides an overview of the security features that the Cisco Unified IP Phone 7962G and
7942G support. For more information about these features and about Cisco Unified Communications
Manager and Cisco
Unified IP Phone security, refer to Cisco Unified Communications Manager
Security Guide.
For information about current security settings on a phone, choose Settings > Security Configuration
and choose Settings > Device Configuration > Security Configuration. For more information, see
Security Configuration Menu, page 4-30.
Note Most security features are available only if a certificate trust list (CTL) is installed on the phone. For
more information about the CTL, refer to
Configuring the Cisco CTL Client in Cisco Unified
Communications Manager Security Guide.
Ta b l e 1-4 Overview of Security Features
Feature Description
Image authentication Signed binary files (with the extension .sbn) prevent tampering with the firmware image before
it is loaded on a phone. Tampering with the image causes a phone to fail the authentication
process and reject the new image.
Customer-site certificate
installation
Each Cisco Unified IP Phone requires a unique certificate for device authentication. Phones
include a manufacturing installed certificate (MIC), but for additional security, you can
specify in Cisco Unified
Communications Manager Administration that a certificate be
installed by using the Certificate Authority Proxy Function (CAPF). Alternatively, you can
install a Locally Significant Certificate (LSC) from the Security Configuration menu on the
phone. See
Configuring Security on the Cisco Unified IP Phone, page 3-14 for more
information.
Device authentication Occurs between the Cisco Unified Communications Manager server and the phone when each
entity accepts the certificate of the other entity. Determines whether a secure connection
between the phone and a Cisco Unified Communications Manager should occur; and, if
necessary, creates a secure signaling path between the entities by using TLS protocol. Cisco
Unified Communications Manager will not register phones unless they can be authenticated
by the Cisco Unified
Communications Manager.
File authentication Validates digitally signed files that the phone downloads. The phone validates the signature to
make sure that file tampering did not occur after the file creation. Files that fail authentication
are not written to Flash memory on the phone. The phone rejects such files without further
processing.
Signaling Authentication Uses the TLS protocol to validate that no tampering has occurred to signaling packets during
transmission.
Manufacturing installed
certificate
Each Cisco Unified IP Phone contains a unique manufacturing installed certificate (MIC),
which is used for device authentication. The MIC is a permanent unique proof of identity for
the phone, and allows Cisco Unified Communications Manager to authenticate the phone.
Secure SRST reference After you configure a SRST reference for security and then reset the dependent devices in
Cisco Unified Communications Manager Administration, the TFTP server adds the SRST
certificate to the phone cnf.xml file and sends the file to the phone. A secure phone then uses
a TLS connection to interact with the SRST-enabled router.