
Appendix
Troubleshooting
Not every fault or malfunction is an actual PABX system error. Check your installation configuration with the aid of the following section.
Fault Description
Possible Cause
Fault Remedy
No dial tone after lifting
handset.
PABX not connected to power
supply properly.
Check 230 V AC outlet (for example by plugging in a lamp)
Plug-in power supply unit / power
plug not plugged in properly
Check connection between PABX and 230 V AC outlet.
Terminal device defective.
Replace terminal device / Check terminal device at other connection
Telephone connection faulted,
Faulty installation
Check PABX / jack connections
PABX settings faulted, Ambiguous
programming of PABX system
Unplug and plug the plug-in power supply unit back in. Reset the PABX to initial state.
No internal calls are recei-
ved.
Station guarding (do not disturb)
is active.
Deactivate station guarding (do not disturb).
Call forwarding to another num-
ber activated (special dial tone in
handset).
Cancel call forwarding.
No external calls are re-
ceived.
Same causes and remedies possible as for »No incoming internal calls«.
PABX not connected correctly to
the network termination unit of
your network service provider.
Check the connection between the PABX and network termination unit.
MSN is not entered or assigned
correctly in the PABX.
Check the PC configuration for the PABX.
Note: Check to ensure that ISDN connection is functioning correctly, and that this connection has been enabled by your network service provider. Please contact your
service provider.
No outgoing, external
calls possible.
No authorization for external con-
nections.
Check the user settings in the PC configuration for the PABX.
No outgoing, external
calls possible.
Call charge limit reached (Allo-
wance account).
Check the user settings in the PC configuration for the PABX. Increase cost limit, or reset the sum coun-
ter
External numbers classified as re-
stricted numbers for call control.
Check the settings for call control in the PC configuration for the PABX
No external connections
possible to some remote
terminals.
External numbers are given in the
Restricted numbers list for the dia-
ling region.
Check the settings for call control in the PC configuration for the PABX
Room inquiry not possi-
ble during an external
call.
The telephone's flash key is not
properly configured.
Check the setting of your telephone's flash key. »Flash key«, flash interval 80-120 ms.
Attention: Inquiry calls are not possible with pulse dialing telephones.
If the PABX is connected at the USB port of the PC and recognized by the PC the USB LED on the PABX will light up. If not, the USB ports of the pcs are not activated /
faulty, or the drivers for the PABX are not installed.
The same causes and remedies are possible as described for the previous problems (no internal/external connections possible).
No connections can be
established via the PABX's
USB-port.
The USB ports of the pcs are not
activated or are defective.
In the system control panel (folder »System« - »Device manager«) check whether the USB ports of your
pcs have been activated.
PABX drivers not properly loaded. In the system control panel (folder »System« - »Device manager«) check whether the PABX has been in-
stalled correctly. A question mark in front of the entry for the PABX indicates incorrectly installed / loa-
ded drivers.
Plug the USB connector for the PABX system back into the PC or restart your PC.
Appendix
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