Cisco 7940G Administrator's Manual - Page 10

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Cisco 7940G Administrator's Manual
Prerequisites
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Prerequisites
For the Cisco SIP IP phone to successfully operate as a SIP endpoint in your network, your network must
meet the following requirements:
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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.
OL-2206-01