Cisco 7975G Software Manual page 30

Network Protocols
Network protocol
Skinny Client Control
Protocol (SCCP)
Session Description
Protocol (SDP)
Transmission Control
Protocol (TCP)
Transport Layer Security
(TLS)
Trivial File Transfer
Protocol (TFTP)
User Datagram Protocol
(UDP)
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
10
Purpose
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.
SDP is the portion of the SIP protocol
that determines which parameters are
available during a connection between
two endpoints. Conferences are
established by using only the SDP
capabilities that all endpoints in the
conference support.
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 Unified IP Phone, TFTP
enables you to obtain a configuration
file that is specific to the phone type.
UDP is a connectionless messaging
protocol for delivery of data packets.
Cisco Unified IP Phone
Usage notes
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).
SDP capabilities, such as codec types,
DTMF detection, and comfort noise, are
normally configured on a global basis
by Cisco Unified Communications
Manager or Media Gateway in operation.
Some SIP endpoints may allow
configuration of these parameters on the
endpoint itself.
Cisco Unified IP Phones use TCP to
connect to Cisco
Unified Communications Manager and
to access XML services.
When security is implemented, Cisco
Unified IP Phones use the TLS protocol
for secure registration with Cisco
Unified Communications Manager.
For more information, see the
Cisco Unified Communications Manager
Security Guide.
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 that the DHCP server
specifies, you must manually assign
TFTP server from the Network
Configuration menu on the phone.
For more information, see the "Cisco
TFTP" chapter in the Cisco Unified
Communications Manager System
Guide.
Cisco Unified IP Phones transmit and
receive RTP streams, which utilize UDP.