Link Fault Detection - IMC Networks McPC 10/100 Operation Manual

Link Fault Detection Feature
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 for
100 Mbps. NOTE: 6 must also be ON when enabling LFD.
When using the LFD feature, if the DIP switches are in any other
combination than listed above, the module may exhibit erratic behavior.
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