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Prerequisites

•

Prerequisites

For the Cisco SIP IP phone to successfully operate as a SIP endpoint in your network, your network must

meet the following requirements:

•

Cisco SIP IP Phone Connections

The Cisco SIP IP phone has connections for connecting to the data network, for providing power to the

phone, and for connecting a headset to the phone.

IP phone.

Cisco SIP IP Phone Administrator Guide Version 3.0

1-10

Trivial File Transfer Protocol (TFTP)—Allows files to be transferred from one computer to another

over a network. The Cisco SIP IP phone uses TFTP to download configuration files and software

updates.

User Datagram Protocol (UDP)—A simple protocol that exchanges data packets without

acknowledgments or guaranteed delivery. SIP can use UDP as the underlying transport protocol. If

UDP is used, retransmissions are used to ensure reliability.

The Cisco SIP IP phone supports UDP as it is defined in RFC 768 for SIP signaling.

A working IP network is established.

For more information about configuring IP, refer to

12.2.

VoIP is configured on your Cisco routers.

For more information about configuring VoIP, refer to the

Configuration

Guide, Release 12.2, for the appropriate access platform. For more information about

configuring SIP VoIP, refer to the

VoIP gateways are configured for SIP.

A TFTP server is active and contains the latest Cisco SIP IP phone firmware image in its root

directory.

A proxy server is active and configured to receive and forward SIP messages.

Cisco IOS IP Configuration

Cisco IOS Voice, Video, and Fax

"Configuring SIP for VoIP"

Figure 1-3

illustrates the connections on the Cisco SIP

Chapter 1

Product Overview

Guide, Release

chapter.

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