Usage notesPurposeNetwork Protocol
Cisco Unified IP Phones use TCP
to connect to Cisco Unified
Communications Manager.
TCP is a connection-oriented
transport protocol.
Transmission Control Protocol
(TCP)
When security is implemented,
Cisco Unified IP Phones use the
TLS protocol when securely
registering with Cisco
Unified Communications Manager.
For more information, see the
Cisco Unified Communications
Manager Security Guide.
TLS is a standard protocol for
securing and authenticating
communications.
Transport Layer Security (TLS)
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 by using
the Network Configuration menu
on the phone.
For more information, go to the
“Cisco TFTP” chapter in the Cisco
Unified Communications Manager
System Guide.
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.
Trivial File Transfer Protocol
(TFTP)
Cisco Unified IP Phones transmit
and receive RTP streams, which
use UDP.
UDP is a connectionless messaging
protocol for delivery of data
packets.
User Datagram Protocol (UDP)
Related Topics
Cisco Unified IP Communications Product Interactions
Phone Startup Process
Cisco Unified IP Phone 6901 and 6911 Supported Features
Cisco Unified IP Phones function much like a digital business phone, allowing you to place and receive phone
calls. In addition to traditional telephony features, the Cisco Unified IP Phone includes features that enable
you to administer and monitor the phone as a network device.
Feature Overview
Cisco Unified IP Phones provide traditional telephony functionality, Call Forward, Transfer, Redial, Conference,
and voice message system access. Cisco Unified IP Phones also provide a variety of other features. For more
Cisco Unified IP Phone
14
Cisco Unified IP Phone
Cisco Unified IP Phone 6901 and 6911 Supported Features
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