Troubleshooting Features - IMC Networks McBasic 10/100 Operation Manual

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LFD OFF
PNP OFF
FORCE OFF
10/100 OFF

Troubleshooting Features

The McBasic 10/100 media converters include two advanced troubleshooting
features to help locate "silent failures" on the network.
•
Transparency
•
Link Fault Detection (LFD)
Transparency
Transparency is only available in PNP mode. Transparency treats the connection
between the two end devices as if there were no media converters installed. In a
typical application where two media converters are installed between two copper-
based switches, the twisted pair cables as well as the fiber cable are seen as one
entity. If a fault occurs on any segment between the two end devices, link LEDs on
the end devices will go out. This prevents any failure on the link between the end
units from going undetected.
As stated, transparency is available when McBasic 10/100 is operating in Auto
Negotiation mode:
•
S6 PNP (AN) must be ON
•
S5 (LFD), S7 (Force) and S8 (10 or 100) must be OFF
PNP Force Force
(AN) 100 10
OFF OFF OFF
ON OFF OFF
OFF ON ON
OFF OFF ON
5
Force Force
100 LFD 10 LFD
ON ON
OFF OFF
ON ON
OFF ON