B&B Electronics 855-12260--63 - Manual User Manual

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Link Fault Detection (LFD) is only available when using Force 10 or Force 100
mode. It is not available in Auto Negotiation mode. When LFD is enabled and the
input link is down at one interface to the McPC 10/100, the transmitter output on
that interface will blink. It applies to both network interfaces and to both data
rates. If the link at the other interface to the McPC 10/100 is also down, there is
no output. LFD causes the Link Up indicator of the link partner to blink.

When the McPC 10/100 is in one of the Force modes, enable LFD by setting 5 to
the ON position. Disable LFD by resetting 5 to its default, OFF, position. In order
for LFD to function properly, Force mode must be enabled by setting 7 to ON
with either 8 ON for 10 Mbps or 8 OFF for100 Mbps. NOTE: 6 must also be ON
when enabling LFD.

LFD On Positions for 10 Mbps

LFD On Positions for 100 Mbps

NOTE

When using the LFD feature, if the DIP Switches are in any other combination

than listed above, the module may exhibit erratic behavior.

Twisted Pair Crossover/Pass-Through Button (ISA Version)
The McPC 10/100 features a crossover/pass-through button, located on the
faceplate next to the RJ-45 connector, to set the twisted pair connection type.
Select a pass-through connection by pressing the button. A crossover
connection is selected when the button is OUT. If it is not known which
connection is needed, set the button to whatever setting makes the twisted pair
LNK (link) LED glow.