Cisco 7906G Administration Manual page 39

Chapter 1 An Overview of the Cisco Unified IP Phone
Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol
Real-Time Control
Protocol (RTCP
Real-Time Transport
Protocol (RTP)
Session Description
Protocol (SDP)
Session Initiation
Protocol (SIP)
Skinny Client Control
Protocol (SCCP)
Transmission Control
Protocol (TCP)
Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager 5.1
OL-11515-01
Purpose
RTCP works with RTP to provide
QoS data (such as jitter, latency, and
round trip delay) on RTP streams.
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
SDP is the portion of the SIP protocol
that determines which parameters are
available during a connection
between two endpoints. Conferences
are established using only the SDP
capabilities that are supported by all
endpoints in the conference.
SIP is an emerging standard for
setting up telephone calls,
multimedia conferencing, and other
types of communications on the
Internet.
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.
TCP is a connection-oriented
transport protocol.
What Networking Protocols Are Used?
Usage Notes
RTCP is disabled by default, but you
can enable it on a per phone basis
using Cisco Unified CallManager.
For more information, see the
"Network Configuration Menu"
section on page 4-25.
Cisco Unified IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.
SDP capabilities, such as codec
types, DTMF detection, and comfort
noise, are normally configured on a
global basis by Cisco Unified
CallManager or Media Gateway in
operation. Some SIP endpoints may
allow these parameters to be
configured on the endpoint itself.
You can configure the
Cisco Unified IP Phone to use either
SCCP or SIP.
You can configure the
Cisco Unified IP Phone to use either
SCCP or Session Initiation Protocol
(SIP).
Cisco Unified IP Phones use TCP to
connect to
Cisco Unified CallManager and to
access XML services.
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