The Front Panel Leds - Acer ISDN 128 Surf USB User Manual

ISDN USB TA Quick Start Guide
As a quick rule of thumb, if your PC was made
during or before 1996, it probably doesn't
support USB. If it was made during 1997, it
probably supports USB. If it was made during
or after 1998, it almost certainly supports USB.
3. At least 10MB of free disk space for the driver and
software.
4. An ISDN basic rate S0 interface released by PTT (Post,
Telephone and Telegraph administration).

2.2 The Front Panel LEDs

LED
When this LED is lit, it indicates that the USB port is
USB
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.
When lit it indicates that the ISDN "B1" channel is being
B1
accessed. It will flash when there is data transfer in the B1.
When lit it indicates that the ISDN "B2" channel is being
B2
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 ISDN USB TA.
(Optional) When lit it indicates that a voice call is being
established and the headset can be used for conversation.
8
Meaning