Cisco 6841 Administration Guide

CHAPTER 8
Cisco IP Phone Security
• Security Features, on page 121
• Cisco Product Security Overview, on page 125
Security Features
Security features ensure that calls are secure and authenticated.
Domain and Internet Setting
Configure Restricted Access Domains
If you enter domains, the Cisco IP Phone responds only to SIP messages only from the identified servers.
Before you begin
Access the phone administration web page. See Access the Phone Web Page, on page 92.
Procedure
Step 1 Select Voice > System.
Step 2 In the System Configuration section, in the Restricted Access Domains field, enter fully qualified domain
names (FQDNs) for each SIP server that you want the phone to respond to. Separate FQDNs with commas.
Example:
voiceip.com, voiceip1.com
Step 3 Click Submit All Changes.
Configure the Internet Connection Type
You can set the connection type to one of the following:
• Dynamic Host Configuration Protocol (DHCP)—Enables the phone to receive an IP address from the
network DHCP server. The Cisco IP phone typically operates in a network where a DHCP server assigns
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
121

Cisco 6841 Specifications

General

Brand	Cisco
Model	6841
Category	IP Phone
Language	English