Cisco ATA 188 Ikhtisar - Halaman 3

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Chapter 1

Cisco Analog Telephone Adaptor Overview

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MGCP is a client-server protocol. The Call Agent handles all aspects of setting up calls to and from

endpoints. Call Agents or control servers provide the feature capabilities that a particular endpoint uses.

Endpoints connected to different Call Agents likely will have a different set of features.

Each control-server vendor determines its own set of features.

Hardware Overview

The Cisco ATA 186 and Cisco ATA 188 are compact, easy-to-install devices.

panel of the Cisco ATA 186.

Figure 1-4

Figure 1-5

OL-4803-01

Determines the availability of the target endpoint.

Establishes a session between the originating and target endpoint if a call can be completed. MGCP

also supports mid-call changes, such as adding another endpoint to the conference or changing a

media characteristic or codec.

Each MGCP endpoint supports up to two connections per device. Each connection has a fixed

ID—0, 1, 2, or 3. Connection IDs 0 and 2 are assigned to MGCP Endpoint 0, and connection IDs 1

and 3 are assigned to MGCP Endpoint 1.

Figure 1-5

Cisco ATA 186—Rear View

PHONE 1

PHONE 2

RJ-11 FXS ports

RJ-45 10BaseT

Cisco ATA 188—Rear View

PHONE 1

PHONE 2

LINK

RJ-11 FXS ports

LINK LED

RJ-45 10/100BaseT ports

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for MGCP (version 3.0)

shows the rear panel of the Cisco ATA 188.

10BaseT

ACT

Power

connector

ACT LED

10/100 PC

10/100 UPLINK