Cisco 7960G Administration Manual page 30

What Networking Protocols Are Used?
Table 1-1 Supported Networking Protocols on the Cisco IP Phone (continued)
Networking Protocol
Internet Protocol (IP)
Real-Time Transport
(RTP)
Transmission Control
Protocol (TCP)
Transport Layer
Security (TLS)
Trivial File Transfer
Protocol (TFTP)
User Datagram Protocol
(UDP)
Cisco IP Phone Administration Guide for Cisco CallManager 4.0, Cisco IP Phones 7960G/7940G
1-6
Purpose
IP is a messaging protocol that
addresses and sends packets across
the network.
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
TCP is a a connection-oriented
transport protocol.
TLS is a standard protocol for
securing and authenticating
communications.
TFTP allows you to transfer files
over the network.
On the Cisco IP Phone, TFTP
enables you to obtain a configuration
file specific to the phone type.
UDP is a connectionless messaging
protocol for delivery of data packets.
Chapter 1 An Overview of the Cisco IP Phone
Usage Notes
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 IP Phone with Dynamic Host
Configuration Protocol (DHCP). If
you are not using DHCP, you must
manually assign these properties to
each phone locally.
Cisco IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.
Cisco IP Phones use TCP to connect
to Cisco CallManager and to access
XML services.
When security is implemented,
Cisco IP Phones use the TLS
protocol when securely registering
with Cisco CallManager and when
communicating with the Certificate
Authority Proxy Function (CAPF).
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.
Cisco IP Phones receive and process
UDP messages.
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