3Com 520 User Manual
Page 21
Introduction
1-7
■
Quick flash – Self test or software loading during
power up.
■
Off – No power supplied to the unit. See
on
for more details.
LINK
(Orange)
This LED indicator shows the
condition of the LAN connection:
■
Off
–
No LAN connection detected.
■
On – LAN connected.
ISDN OK
(Green) This LED indicator provides
confirmation of the state of the ISDN line.
■
On
–
Indicates the OfficeConnect Remote is
connected to a working ISDN line. Sometimes
this LED does not light until the first call attempt
is made.
■
Flashing
–
A fault condition has been identified
on the ISDN line.
■
Off
–
No ISDN connection present.
ISDN1
and
ISDN 2
(
Yellow)
These LED indicators
provide confirmation that an ISDN call is in progress
on ISDN Channel 1 or Channel 2. You are connected
to a remote ISDN unit and are incurring ISDN call
charges while this LED is lit. If the LED is flashing it
indicates that a call is being made but a connection
has not yet been made to the remote unit.
Rc.bk : RC01.FRM Page 7 Thursday, July 10, 1997 9:53 AM