Troubleshooting Dual-Channel ISDN Connection Problems |
Q157275
The information in this article applies to:
-
The Microsoft Network versions 1.3, 2.0, 2.5
SUMMARY
This article contains information to help you identify why the second
channel on your ISDN adapter may not connect to MSN, The Microsoft
Network.
MORE INFORMATION
Your ISDN adapter Can Support Only a Single Channel
Not all ISDN adapters can support more than one channel. Read the
documentation included with your adapter to identify whether your ISDN
adapter can support Multilink PPP.
Your ISDN Line Is Not Set Up for Dual-Channel Connections
When you have your ISDN line installed, you may need to specify to your
ISDN provider that you need two channels provisioned on your line. This
is not always the default configuration from your ISDN provider.
Your ISDN Adapter Settings Are Not Correct
With most ISDN adapters that can support Multilink PPP, you must change
the settings to enable dual-channel capabilities. Use the documentation
included with your adapter to identify which settings to use for Multilink
PPP. Then, you can change the settings using these steps:
- Click Start, point to Settings, and then click Control Panel.
- Double-click Modems.
- Click the ISDN adapter you are using, and then click Properties.
- On the Connection tab, click Advanced.
- In the Extra Settings box, type the dual-channel settings for your
ISDN adapter. You can find these settings in the documentation for
your adapter.
The Two ISDN Channels Are Connected to Different Access Boxes
Internet access numbers sometimes have more than one access box to handle
a large number of incoming calls at once. Sometimes, when you connect with
two channels, the channels get separated into two different access boxes.
This situation is called straddling. When straddling occurs, your second
channel might not make a connection. And in some cases, your adapter might
not make a connection at all. If this happens, you must wait and try your
connection again later.
The Phone Numbers for Your Adapter Are Not Configured Correctly
ISDN lines usually come configured with two phone numbers. When you use
dual-channel ISDN, your adapter uses only one phone number. The second
number might be the reason your second line is not connecting. This
problem is especially common with the 3Com Impact adapter running firmware
version 2.02. If you think the second phone number might be the problem,
try reconfiguring your adapter to use only one of your ISDN numbers.
If you experience difficulties, please contact technical support for the
manufacturer of the ISDN device.
Additional query words:
msn