Netopia 435 Reference Manual page 215

The Ready LED is off
The initial call made or received on the ISDN line may activate
the Ready LED. You can also activate the LED by using the ISDN
loopback test. See
more information on using the ISDN loopback test.
Calls do not go through
If the Ready LED is glowing solid green and the ISDN loopback test
is successful, calls you make with the Netopia ISDN Router should
go through. There may be several reasons why a particular call does
not go through:
The number being dialed is wrong.
The connection profile being used has the Dial On Demand
parameter (in the Telco Options screen) set to No. It should be
set to Yes.
The connection profile being used has the Dial parameter (in
the Telco Options screen) set to Dial In Only. It should be set to
Dial In/Out or Dial Out Only.
The connection profile being used has the B-Channel Usage
parameter (in the PPP/MP Options screen) set to 2 B-Channels
or Dynamic. Try making the call using 1 B-Channel.
If you are trying to call an ISP, confirm the following:
The ISP's directory number
The authorization method you use (PAP, CHAP, or none) to
access your ISP account
If using PAP or CHAP, the name and password/secret you were
given
The ISP's IP address
Check the ISDN event history for more information.
Troubleshooting
"The ISDN loopback test" on page 10-3
A-3
for