ZyXEL Communications IP PBX X6004 - Manual (Page 277)

Chapter 18 Outbound Line Group
X6004 User’s Guide
277
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 X6004s
are connected through a single BRI line to one TSP (Telecommunications Service
Provider). Each X6004 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
following.
• In order to create an FXO/BRI/PRI trunk you must already have a corresponding
interface card installed on the X6004. See the Quick Start Guide for information
on installing your interface cards.
6012
6012
PBX
MSN: 555-123456
555-123456
ISDN BRI
TE mode
Please
extension!
dial
or 555-987654
NT mode
MSN: 555-987654
TE mode
MSN1: 555-123456
MSN2: 555-987654
A
AA TSP