Cisco VG200 매뉴얼 사용 - 페이지 10

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Cisco VG200에 대해서도 마찬가지입니다: 매뉴얼 (10 페이지)

Using a Cisco VG200 Gateway with H.323

FXO Emulation

Figure 1-5

To make this work you must obtain Direct Inward Dialing (DID) service from

your local exchange carrier (LEC) on the DS-0 groups used for incoming calls.

DID service is provided only on incoming connections, so to use it, you must

divide your T1 channels into incoming and outgoing DS-0 groups.

You can configure your dial plan on a Cisco VG200 gateway, using Cisco IOS CLI

commands to identify the destination endpoint and coder-decoder (CODEC) for

each incoming call on each DS-0 group. This is a straightforward task, but this

method of configuration does not take full advantage of the Cisco CallManager

and can only be used for H.323 endpoints.

You can configure a Cisco VG200 gateway to direct all incoming calls to the

Cisco CallManager, and configure your dial plan using the Cisco CallManager

Administrator. This simplifies administration and lets you connect simple IP

telephony devices (such as the Cisco IP Phone 7960 and Cisco IP SoftPhone) to

the PSTN. This configuration is described in Chapter 3, "Configuring Voice over

IP."

Software Configuration Guide for the Cisco VG200

1-10

Using FXO Analog Emulation with T1-CAS

T1-CAS

DS-0 groups 0-23

PSTN

DS-0 groups 0-23

FXO emulation

DID incoming lines

10/100BaseT Ethernet

Simple IP

telephony devices

Chapter 1

Using the Cisco Voice Gateway 200

Port 0

Voice Gateway

Gateway

Port 1

Cisco CallManager

H.323 endpoint

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