Troubleshooting
74
FRITZ!X USB – 8 Support
Automatic outside dialing is deactivated for your extension,
and you hear a busy signal 30 seconds after picking up the
handset or switching on your fax machine
This is not an error. FRITZ!X USB sounds the busy signal if
your handset is off the hook for 30 seconds and no number
is dialed. Dial the desired phone or fax number within 30
seconds.
The extension does not ring for an incoming external call
z
Check whether the terminal device that you expect to
receive an external call is connected to the right
extension. Then make sure that the MSN which your
caller is dialing is assigned to that extension. If not,
either connect the terminal device to the extension to
which the MSN is actually assigned, or assign the MSN
to the extension to which the terminal device is actually
connected.
z
Check whether the extension has been assigned an
MSN as its outgoing Caller ID, but not as a dial-in
number. In order for the extension to ring, you must
either assign it a valid MSN as a dial-in number, or clear
all of its MSN settings, both outgoing Caller ID and dial-
in numbers.
z
Check whether the FRITZ! modules respond to incoming
calls.
All incoming calls are answered by the integrated ISDN-
Controller
Check the program settings in FRITZ!fax and FRITZ!fon. Is
FRITZ!fax standing by for incoming calls? If you have selected
the call acceptance option “Answer all incoming fax calls” on
the “ISDN” settings page, then no calls can be answered by
FRITZ!X USB’s analog extensions.
If FRITZ!fon is standing by for incoming calls and you have
selected the call acceptance option “All incoming calls” on
the “ISDN” settings page, then FRITZ!fon takes all incoming
calls after a certain delay. In this case, no calls can be
answered by FRITZ!X USB’s analog extensions. The delay
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