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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SCCP), Cisco Unified IP Phones
OL-8151-01
Chapter 1 An Overview of the Cisco Unified IP Phone
What Networking Protocols Are Used?
Internet Protocol (IP)
IP is a messaging protocol that
addresses and sends packets across
the network.
To communicate using IP, network
devices must have an assigned IP
address, subnet, and gateway.
IP addresses, subnets, and gateways
identifications are automatically
assigned if you are using the
Cisco Unified IP Phone with
Dynamic Host Configuration
Protocol (DHCP). If you are not
using DHCP, you must manually
assign these properties to each phone
locally.
Real-Time Transport
(RTP)
RTP is a standard for transporting
real-time data, such as interactive
voice and video, over data networks.
Cisco Unified IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.
Skinny Client Control
Protocol (SCCP)
SCCP includes a messaging set that
allows communications between call
control servers and endpoint clients
such as IP Phones. SCCP is
proprietary to Cisco Systems.
Cisco Unified IP Phones use SCCP
for call control. You can configure
the Cisco Unified IP Phone to use
either SCCP or Session Initiation
Protocol (SIP).
Transmission Control
Protocol (TCP)
TCP is a a connection-oriented
transport protocol.
Cisco Unified IP Phones use TCP to
connect to
Cisco Unified CallManager and to
access XML services.
Trivial File Transfer
Protocol (TFTP)
TFTP allows you to transfer files
over the network.
On the Cisco Unified IP Phone,
TFTP enables you to obtain a
configuration file specific to the
phone type.
TFTP requires a TFTP server in your
network, which can be automatically
identified from the DHCP server. If
more than one TFTP server is
running in your network, you must
manually assign a TFTP server to
each phone locally.
User Datagram Protocol
(UDP)
UDP is a connectionless messaging
protocol for delivery of data packets.
Cisco Unified IP Phones receive and
process UDP messages.
Table 1-1
Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol
Purpose
Usage Notes
Summary of Contents for 7902G - Unified IP Phone VoIP
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