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Deployment Guide for the Polycom CX700 IP Phone
2
DHCP and the Polycom CX700 IP Phone
All computers that are on a TCP/IP network must have an IP address for the
network to work correctly. Generally, you can manually configure IP
addresses at each computer, or you can install a Dynamic Host Configuration
Protocol (DHCP) server that automatically assigns IP addresses to each client
computer or device on the network. The Polycom CX700 phone is no exception
and therefore can receive only DHCP-assigned IP addresses and requires no
configuration on the device.
A DHCP client is any network-enabled device that enables you to
communicate with a DHCP server to obtain dynamic, leased IP configuration
and related optional information. The Polycom CX700 phone is a DHCP client.
DHCP Search Options
To complete unqualified domain name system (DNS) names that will be used
to search and submit DNS queries at the client for resolution, you must have a
list of DNS suffixes that can be appended to these DNS names. For DHCP
clients, this can be set by assigning the DNS domain name option (Option 15)
and providing a single DNS suffix for the client to append and use in searches.
In some circumstances it is preferable that a DHCP client be configured by
using multiple DNS suffixes, supported with the use of DHCP Search Option
119.
DHCP Search Option 119 is passed from the DHCP server to the DHCP client
to specify the domain search list used when resolving hostnames with DNS.
DHCP Search Option 119 applies only to DNS and does not apply to other
name resolution mechanisms.
For the most up-to-date version of the Deploying Microsoft Office Communicator
2007 R2 Phone Edition documentation and the complete set of the Microsoft®
Office Communications Server 2007 R2 online server and client documentation,
see the Office Communications Server TechNet Library at
http://go.microsoft.com/fwlink/?LinkID=132106.
DHCP Option Description
015 Specifies the connection-specific DNS domain suffix to
be used by the DHCP client.
119 DNS Domain Search List option to specify the domain
search list used when resolving hostnames with DNS.