Use of DHCP is strongly recommend for ease of both installation and maintenance. In addition to providing the telephone with an IP address, the DHCP server also provides the telephone with address details of the SIP and file server it should use.
DHCP support can be done in two ways:
IP Office DHCP: The IP Office system can act as the DHCP server for telephones. This is the recommended method if the customer does not already have a separate DHCP server. See DHCP settings.
Third-Party DHCP: For customers with a separate DHCP server, that server can be used to support DHCP for IP phone if it can be configured with additional OPTIONS settings. See Alternate DHCP server setup.