Operation Manual

Troubleshooting
Controller C4 – 8 Troubleshooting 37
8 Troubleshooting
This chapter describes general malfunctions and specific er-
ror messages, and suggests remedies. The error messages
are grouped according to the operating platforms in which
the AVM ISDN-Controller C4 can be installed.
8.1 General Malfunctions
The AVM ISDN-Controller is not detected or not initialized.
Have you installed other new hardware components or chan-
ged the configuration of existing hardware?
If you combine adapters without Plug-and-Play support and
PCI or ISA Plug-and-Play cards in one system, then the re-
sources (I/O addresses and IRQ levels) used by the hardware
without Plug-and-Play support should be so designated in
the computer’s BIOS. Otherwise, system resources may be
allocated to more than one adapter, resulting in mal-
functions. Please see your PC or mainboard manual.
You are unable to establish an ISDN connection.
If the AVM ISDN-Controller C4 is correctly installed but you
are unable to establish a connection, check for the following
conditions:
l Is the ISDN-Controller C4 firmly inserted in the PCI slot?
Is its slot plate screwed down?
l Are the ISDN cable connectors firmly inserted in the
AVM ISDN-Controller C4 and in your ISDN socket?
l Is your ISDN line active? Use another terminal device,
such as an ISDN telephone, to check it.
l Is your network terminator (NT) installed correctly?
Some NTs must be connected to an electrical outlet as
well as to the incoming ISDN line.