ISDN


Overview

In most situations, there is no need to change these settings. They are provided to allow you to:


ISDN Screen

Figure 1: ISDN Tab

Data - ISDN Screen

Usage

Always use 1 B Channel

Only 1 B Channel is used for Internet Access. The 2nd B Channel is never used for Internet Access, but is available for Dial-in Access (if enabled and configured).

Dynamically use 2 B Channels

For Internet Access, 1 or 2 channels are used, depending on the volume of traffic. If Dial-in Access is enabled, then the 2nd B Channel will be dropped if required to allow connection of an incoming call.

Always use 2 B Channels

If an Internet connection is required, both 2 "B" channels are always used. Dial-in, if enabled, is only possible if no Internet connection exists (the Level One ISDN Router is idle).
Outgoing Call ID
MSN If provided, enter the MSN (Multiple Subscriber Numbering) which receivers of your calls will see (using caller ID). The phone company will bill this number.
SAD If provided, enter the SAD (SubAddress). The SAD acts like an extension number to your main ISDN number. You can dial-up from this number instead of the main number.
Incoming Call ID
MSN If provided, enter the MSN (Multiple Subscriber Numbering) which callers should use to connect to this device.
SAD If provided, enter the SAD (SubAddress). The SAD acts like an extension number to your main ISDN number. Incoming callers can connect by dialling this number.
Advanced B Channel Settings

B Channel Line Speed

The default is 64K. Set to 56K only if advised to do so by your phone company.

B Channel Init String

This is normally not needed. If required, enter the value advised by technical support staff.