Cisco 7961G Administration Manual page 35

Chapter 1 An Overview of the Cisco IP Phone
Table 1-1 Supported Networking Protocols on the Cisco IP Phone (continued)
Networking Protocol
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, Cisco IP Phone 7961G/7961G-GE and 7941G/7941G-GE
OL-6966-01
Purpose
TCP is 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.
Related Topics
Understanding Interactions with Other Cisco IP Telephony Products, page 2-2
Understanding the Phone Startup Process, page 2-9
Network Configuration Menu, page 4-6
What Networking Protocols are Used?
Usage Notes
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.
TFTP requires a TFTP server in your
network, which can be automatically
identified from the DHCP server. If
you want a phone to use a TFTP
server other than the one specified by
the DHCP server, you must manually
assign the IP address of the TFTP
server using the Network
Configuration menu on the phone.
Cisco IP Phones transmit and receive
RTP streams, which utilize UDP.
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