Preparing To Install The Cisco Unified Ip Phone On Your Network; Understanding How The Cisco Unified Ip Phone Interacts With Cisco Unified Callmanager - Cisco 3951 Administration Manual

Unified sip phone for cisco unified callmanager 5.1

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Table of Contents

Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified CallManager

Understanding How the Cisco Unified IP Phone

Interacts with Cisco Unified CallManager

Note

Cisco Unified SIP Phone 3951 Administration Guide for Cisco Unified CallManager 5.1

2-2

Chapter 2

Cisco Unified CallManager is an open and industry-standard call processing

system. To function in the IP telephony network, the Cisco Unified IP Phone must

be connected to a networking device, such as a Cisco Catalyst switch. You must

also register the Cisco Unified IP Phone with a Cisco Unified CallManager

system before sending and receiving calls.

Cisco Unified CallManager software sets up and tears down calls between

phones, integrating traditional PBX functionality with the corporate IP network.

Cisco Unified CallManager manages the components of the IP telephony

system—the phones, the access gateways, and the resources necessary for such

features as call conferencing and route planning. Cisco Unified CallManager also

provides:

Firmware for phones

•

Authentication

•

Configuration file via TFTP service

•

Phone registration

•

Call preservation, so that a media session continues if signaling is lost

•

between the primary CallManager and a phone)

For information about configuring Cisco Unified CallManager to work with the

IP devices described in this chapter, refer to Cisco Unified CallManager

Administration Guide, Cisco Unified CallManager System Guide, and to Cisco

Unified CallManager Security Guide.

For an overview of security functionality for the Cisco Unified IP Phone, see the

"Understanding Security Features for Cisco Unified SIP Phone 3951" section on

page

1-9.

If the Cisco Unified IP Phone model that you want to configure does not appear

in the Phone Type drop-down list in Cisco Unified CallManager Administration,

go to the following URL and install the latest support patch for your version of

Cisco Unified CallManager:

http://www.cisco.com/kobayashi/sw-center/sw-voice.shtml