Chapter 1 An Overview of the Cisco Unified IP Phone

 

 

 

 

What Networking Protocols Are Used?

 

Table 1-1

Supported Networking Protocols on the Cisco Unified IP Phone (continued)

 

 

 

 

 

Networking Protocol

Purpose

Usage Notes

 

 

 

 

 

Real-Time Control

RTCP works in conjunction with

RTCP is disabled by default, but you

 

Protocol (RTCP)

RTP to provide QoS data (such as

can enable it on a per phone basis

 

 

 

jitter, latency, and round trip delay)

using Cisco Unified CallManager.

 

 

 

on RTP streams.

For more information, see the

 

 

 

 

“Network Configuration” section on

 

 

 

 

page 4-35.

 

 

 

 

 

Skinny Client Control

SCCP includes a messaging set that

You can configure the Cisco

 

Protocol (SCCP)

allows communications between call

Unified IP Phone to use either SCCP

 

 

 

control servers and endpoint clients

or Session Initiation Protocol (SIP).

 

 

 

such as IP Phones. SCCP is

 

 

 

 

 

 

 

proprietary to Cisco Systems.

 

 

 

 

 

 

 

 

 

Session Initiation

SIP is an emerging standard for

You can configure the Cisco

 

Protocol (SIP)

 

setting up telephone calls,

Unified IP Phone to use either SCCP

 

 

 

multimedia conferencing, and other

or SIP.

 

 

 

types of communications on the

 

 

 

 

 

 

 

Internet.

 

 

 

 

 

 

 

 

 

Session Description

Session Description Protocol (SDP)

SDP capabilities, such as codec

 

Protocol (SDP)

 

is the portion of the SIP protocol that

types, DTMF detection and comfort

 

 

 

determines which parameters are

noise are normally configured on a

 

 

 

available during a connection

global basis by Cisco Unified

 

 

 

between two endpoints. Conferences

CallManager or Media Gateway in

 

 

 

are established using only the SDP

operation. Some SIP endpoints may

 

 

 

capabilities that are supported by all

allow these parameters to be

 

 

 

endpoints in the conference.

configured on the end point itself.

 

 

 

 

This may vary from vendor to

 

 

 

 

vendor.

 

 

 

 

 

Transmission Control

TCP is a connection-oriented

Cisco Unified IP Phones use TCP to

 

Protocol (TCP)

 

transport protocol.

connect to Cisco

 

 

 

 

Unified CallManager and to access

 

 

 

 

XML services.

 

 

 

 

 

 

Transport Layer

 

TLS is a standard protocol for

When security is implemented, Cisco

 

Security (TLS)

 

securing and authenticating

Unified IP Phones use the TLS

 

 

 

communications.

protocol when securely registering

 

 

 

 

with Cisco Unified CallManager.

 

 

 

 

 

 

 

 

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones

 

 

 

 

 

OL-11524-01

 

 

 

 

1-7

 

 

 

 

 

 

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Image 41
Cisco Systems 7970G manual Network Configuration section on