Huawei Technologies Co. Ltd EM820W 사용자 설명서

Figure 2-3 Enterprise intranet security

Marketing

Financial

Public host

External

server

Internal

server

I n t e rn e t

I n t e r n e t

I n t e rn e t

I n t e r n e t

Public server

Wi-Fi

2.4 Voice Application

NOTE

l Among the AR200 series routers, only the AR207Vs and AR207V-Ps support the voice features.

Among the AR1200 series routers, only the AR1220Vs and AR1220VWs support the voice features.
The AR2200 and AR3200 series routers support the voice features only after a DSP module is installed.

l To provide voice services for POTS users on AR1200, AR2200 ,and AR3200 series routers, 4FXS/

1FXO board is required.

l To provide voice services for ISDN users on AR1200, AR2200 ,and AR3200 series routers, 2BST

board is required.

An enterprise can build a voice communication system over the IP network, reducing operating
expenses (OPEX).

Within the voice communication system, an AR can function as an IP PBX or SIP access gateway
(AG). The AR connects to POTS users (analog phones or fax machines) and SIP user equipment
(UE) users (IP phones or PC software terminals) through FXS or Ethernet interfaces. The AR
connects to the PSTN through FXO interfaces or to the IP network through Ethernet interfaces.

Based on branch locations, the centralized or distributed call control model can be used. If all
branches within an enterprise use the same number segment, the centralized call control model
is recommended. If an enterprise has many branches that use different number segments, the
distributed call control model is recommended.

Huawei AR G3 Series Enterprise Routers
Product Description

2 Network Applications

Issue 02 (2012-04-20)

Huawei Proprietary and Confidential