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1.5 The Front Panel LEDs
LED MEANING
USB
When this LED is lit, it indicates that the
USB port is connected to the PC and
working properly.
ISDN
When lit it indicates that the ISDN S0 bus
is activated. It will flash when there is
message transfer in the D channel.
B1
When lit it indicates that the ISDN B1
channel is being accessed. It will flash
when there is data transfer in the B1.
B2
When lit it indicates that the ISDN B2
channel is being accessed. It will flash
when there is data transfer in the B2.
PC
When this LED is lit, it indicates that there
is at least one application program using
the MISTRAL USB.