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Billion mini USB ISDN TA128
28
Error
Indication
Possible
Cause
Remedy
CAPI driver is
not loaded.
The Registration key
has been destroyed.
Uninstall and then reinstall the
ISDN device.
Please input
your own
number.
The subscriber
number of your own
ISDN line has not
been entered.
Key in the subscriber number
of your ISDN line in the Own
ISDN Number box.
Cannot activate
S0 interface
(“ISDN” LED is
always OFF)
The ISDN line is not
connected.
Ensure that the ISDN S
0
line is
securely connected to the RJ-
45 jack.
Cannot establish
LAPD link.
The ISDN line may
be malfunctioning.
Ensure that the ISDN S
0
line is
in good condition.
1. Own ISDN
Number is
incorrect.
1. Ensure that your ISDN
number is correct.
2. Other devices on
the same S
0
line
are occupying the
B channel.
2. Be sure no other device is
on the same S
0
line and
occupying the B channel.
Connecting fail.
(error code =
xxxx)
3. The ISDN
protocol is
wrong.
3. Check to see if the ISDN
protocol configuration is
correct.
Data transfer
error.
The ISDN line is not
in good condition.
Check the ISDN line.