Chapter 5: Maintenance and troubleshooting
98-126882-F
Troubleshooting guide
139
An ISDN connection
cannot be
established
The cable is not properly
connected.
Connect the cable.
You have connected to
the LAN interface.
Connect the cable to the interface marked
ISDN.
The cable type or
connector type is not
correct.
For information on the correct type of
connector and cable, refer to the
installation manual.
Incoming phone calls:
The call type used for
the call is not selected in
the web interface.
Make sure the call type used for calls to
the terminal is selected in the web
interface. Access the web interface and
select
SETTINGS
>
ISDN
. Then select
the call type for incoming calls.
No phones are
ringing on incoming
calls
The Mute function is
activated from an
external device
connected to the I/O
interface of the terminal.
If the Mute function should not be
activated, deactivate it from the external
device.
A LAN connection
cannot be
established.
The cable is not properly
connected.
Connect the cable.
The cable type or
connector type is not
correct.
For information on the correct type of
connector and cable, refer to the
installation manual.
Problem
Possible Cause
Remedy
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