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Network Requirements

For the Cisco Unified IP Phone to successfully operate as a Cisco Unified IP Phone endpoint in your network,

your network must meet these requirements:

• Working VoIP network:

• IP network that supports DHCP or manual assignment of IP address, gateway, and subnet mask

The Cisco Unified IP Phone displays the date and time from Cisco Unified Communications Manager.

Note

The time displayed on the phone can differ from the Cisco Unified Communications Manager time by up

to 10 seconds. The Cisco Unified Communications Manager server does not display the local time if it is

located in a different time zone than the phones.

The Cisco Unified IP Phone requires Cisco Unified Communications Manager to handle call processing. See

the Cisco Unified Communications Manager Administration Guide or the context-sensitive help in the

Cisco Unified Communications Manager application to ensure that Cisco Unified Communications Manager

is set up properly to manage the phone and to properly route and process calls.

If you plan to use autoregistration, verify that it is enabled and properly configured in

Cisco Unified Communications Manager before you connect any Cisco Unified IP Phone to the network. For

information about enabling and configuring autoregistration, see the Cisco Unified Communications Manager

Administration Guide.

You must use Cisco Unified Communications Manager to configure and assign telephony features to the

Cisco Unified IP Phones.

In Cisco Unified Communications Manager, you can add users to the database and associate them with specific

phones. In this way, users gain access to web pages that allow them to configure items such as call forward,

speed dial, and voice message system options.

The Cisco Unified IP Phones include these components on the phone or as accessories for the phone:

Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified

Communications Manager 9.0 (SCCP and SIP)

◦ VoIP configured on your Cisco routers and gateways

◦ Cisco Unified Communications Manager 4.x and later installed in your network and configured

to handle call processing

Cisco Unified IP Phones Installation