Honeywell Q7055A - Manual (Page 9)

BUILDING NETWORK ADAPTER BNA-1C/2CS/2DN
EN1B-0198GE51 R0801 9
Shows the actual LAN traffic using 4 LEDs.
Col Collision indicator ( Red )
If this LED is on, then two or more
devices on the network are
transmitting at the same time. This is
not a fault, but a normal occurrence
on an Ethernet network. However,
when the Collision LED remains on
for all transmission attempts, it may
indicate an abnormal condition such
as an open end-of-line termination.
Rx Receive indicator ( Green )
on means that data is received by the
BNA over the Ethernet.
Tx Transmit indicator ( Green )
If this LED is lit up, then the BNA
device sends data to the Ethernet.
When data is transmitted, the Rx
indication LED is lit up
simultaneously.
Lnk Link indicator ( Green )
shall always be on when the BNA is
connected via the RJ45 connector to
the Ethernet. If this LED is off under
this circumstance, then it will not be
possible to send or receive any data.
If an AUI transceiver is used to hook
up the BNA to the network, then this
LED will be off in most cases because