Before You Begin - ZyXEL Communications X2002 User Manual

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Calling Directly to an Extension

ISDN calls can be made directly to an extension number from another PBX that is

connected directly. In this example, all incoming calls are forwarded to the

extension called.

Figure 139 Direct Example

MSNs (Multiple Subscriber Numbers)

This feature is relevant to ISDN BRI (TE mode) only. In this example, two X2002s

are connected through a single BRI line to one TSP (Telecommunications Service

Provider). Each X2002 has a unique MSN. These MSNs must correspond to those

configured on the connected ITSP's ISDN device. Device A's auto-attendant

system answers the incoming call only when the number matches the MSN

configured on device A.

Figure 140 MSN Example

18.1.3 Before You Begin

Before you start to configure an outbound line group, please consider the

• In order to create an FXO/BRI/PRI trunk you must already have a corresponding

interface card installed on the X2002. See the Quick Start Guide for information

on installing your interface cards.

X2002 User's Guide

MSN: 555-123456

MSN: 555-987654

Chapter 18 Outbound Line Group

MSN1: 555-123456

MSN2: 555-987654

or 555-987654