Example 3: Company With Existing Pbx And Expanding Employees - ZyXEL Communications ISG50-ISDN User Manual

Chapter 8 PBX Tutorials
• If you don't want incoming calls to go through the Auto-Attendant, select Direct.
• If you are using BRI line(s) and you want to have multiple subscriber numbers on one port, select
MSN and configure the settings.
Note: We don't use DDI/DID in this type of example because DDI/DID is mainly used for
outsiders to call extensions.

8.6.3 Example 3: Company with Existing PBX and Expanding Employees

For a company which has a PBX, and is expanding to include more employees, or a new branch
office (for example). The ISG50 is behind the PBX system connected using a BRI line.
• See an example of configuring ISDN settings in
162
Section 8.5 on page 154.
ISG50 User's Guide