ZyXEL Communications ISG50 User Manual
Chapter 8 PBX Tutorials
ISG50 User’s Guide
160
The following figure shows the three examples (1 ~ 3).
Figure 125
ISDN Network Configuration
8.6.1 Example 1: Small/Medium Business
For a small/medium company, the ISG50 is the only device that forwards ISDN calls between the
company and the telephone service provider.
company and the telephone service provider.
• For an example of configuring ISDN settings, see
ISDN Line
PBX
PBX
A
B
C
D
E
F
1
2
3
ISG
ISG
ISG