Configure Security, Quality, And Network Features; Set Security Features; Configure Domain And Internet Settings; Configure Restricted Access Domains - Cisco 8831 Administration Manual

Configure Security, Quality, and Network
Features
This chapter describes how to configure security, voice quality, and optional network features for the
phone:
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Set Security Features

The security features ensure that calls are secure and authenticated.

Configure Domain and Internet Settings

Configure Restricted Access Domains

If you enter domains, the Cisco IP phones respond to SIP messages only from the identified servers.
To configure restricted access domains, navigate to Admin Login > advanced > Voice > System. Under
System Configuration in the Restricted Access Domains field. Enter fully-qualified domain names
(FQDNs) for each SIP server you want the phone to respond to. Separate FQDNs with semicolons. For
example,

Configure DHCP and Static IP Connection Type

You can set the connection type to one of the following:
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Set Security Features, page 4-1
Configure Voice Codecs, page 4-3
Set Optional Network Servers, page 4-5
Configure VLAN Settings, page 4-5
voiceip.com;voiceip1.com
Dynamic Host Configuration Protocol (DHCP) receives an IP address from the network DHCP
server. The IP conference phones typically operate in a network where a DHCP server assigns the
devices their IP addresses. Because IP addresses are a limited resource, the DHCP server
periodically renews the device lease on the IP address. If a phone loses its IP address for any reason,
or if some other device on the network is assigned its IP address, the communication between the
SIP proxy and the phone is either severed or degraded. Whenever an expected SIP response is not
received within a programmable amount of time after the corresponding SIP command is sent, the
Cisco Unified IP Conference Phone 8831 for Third-Party Call Control Administration Guide
C H A P T E R
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4-1