Operation Manual

LEDs FRITZ!X USB
12 FRITZ!X USB – 1 Introduction
LEDs FRITZ!X USB
The current operational state of FRITZ!X USB is indicated by
five LEDs (light-emitting diodes) on the front panel. The
various LEDs indicate specific conditions as listed in the
following table:
Contact your Internet provider for additional information on
MWI (Message Waiting Indication).
LED Meaning
Power shows the operation status of FRITZ!X USB
...indicates that the device is connected to the power
mains and to ISDN
...blinks if the device is connected to the power mains,
but the connection to ISDN has been lost
USB indicates that the connection between FRITZ!X USB and
the computer is active
Phone indicates the status of the extension lines:
LED off: all terminal equipment on the extension lines is
inactive, or no terminal equipment is connected
LED on: at least one terminal device on an extension is
active
LED blinking: at least one extension is ringing or an MWI
message has arrived.
B1 indicates an active connection on the first B channel
B2 indicates an active connection on the second B channel
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