Configuring Voice Ports - Cisco NM-8B-U - HW ROUTERS L-M User Manual

Configuration Tasks
IP defines a hierarchical naming scheme that allows a device to be identified by its location or domain.
Domain names are pieced together with periods (.) as the delimiting characters. For example, Cisco
Systems is a commercial organization that IP identifies by a com domain name, so its domain name is
cisco.com. A specific device in this domain, the FTP system, for example, is identified as ftp.cisco.com.
To track domain names, IP has defined the concept of a domain name server (DNS), the purpose of which
is to hold a cache (or database) of names mapped to IP addresses. To map domain names to IP addresses,
you must first identify the host names and then specify a name server and enable the DNS, the Internet's
global naming scheme that uniquely identifies network devices.
Specifying the Domain Name
You can specify a default domain name that the software uses to complete domain name requests. You
can specify either a single domain name or a list of domain names. When you specify a domain name,
any IP host name without a domain name has that domain name appended to it before being added to the
host table.
Specifying a Name Server
You can specify up to six hosts that can function as a name server to supply name information for the
DNS.
Enabling the DNS
If your network devices require connectivity with devices in networks for which you do not control name
assignment, you can assign device names that uniquely identify your devices within the entire
internetwork. The Internet's global naming scheme, the DNS, accomplishes this task. This service is
enabled by default.

Configuring Voice Ports

This section describes how to configure voice ports on the Ethernet switch network module. The
following topics are included:
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The Ethernet switch network module can connect to a Cisco 7960 IP phone and carry IP voice traffic. If
necessary, the Ethernet switch network module can supply electrical power to the circuit connecting it
to the Cisco 7960 IP phone.
Because the sound quality of an IP telephone call can deteriorate if the data is unevenly transmitted, the
current release of the Cisco IOS software supports QoS based on IEEE 802.1p CoS. QoS uses classification
and scheduling to transmit network traffic from the switch in a predictable manner.
The Cisco 7960 IP phone contains an integrated three-port 10/100 switch. The ports are dedicated to
connect to the following devices:
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•
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Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ
112
16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series
Configuring a Port to Connect to a Cisco 7960 IP phone, page 113
Disabling Inline Power on a Ethernet switch network module, page 113
Port 1 connects to the Ethernet switch network module switch or other voice-over-IP device
Port 2 is an internal 10/100 interface that carries the phone traffic
Port 3 connects to a PC or other device