IMC Networks iMcV-LIM 10/100, Руководство по эксплуатации

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7
Troubleshooting Features
The 10/100 Autosensing Modules includes two advanced troubleshooting features,
Transparency and Link Fault Detection, to help locate “silent failures” on the
network.
Transparency
Transparency is only available when using AN. When the 10/100 Autosensing
Modules is Auto Negotiating, transparency treats the connection between the two
end devices as if there were no media converters installed. For example, 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.
Since transparency is only available when the 10/100 Autosensing Modules is
operating in Auto Negotiation mode, S2 (AN) must be ON and S1 (LFD), S3 (Force)
and S4 (10/100) must be OFF.
Link Fault Detection
Link Fault Detection (LFD) is only available when using Force 10 or Force 100 mode.
When LFD is enabled and the input link is down at one interface to the 10/100
Autosensing Modules, the LFD LED will blink. This applies to both network interfaces
and to both data rates. If the link at the other interface to the 10/100 Autosensing
Modules 10/100 is also down, there is no output and LFD causes the Link LED to
blink.
When the 10/100 Autosensing Modules is in one of the Force modes, enable LFD by
setting S1 to the ON position. In order for LFD to function properly, Force mode
must be enabled by setting S3 to ON with S4 set for the proper speed.
Twisted Pair Crossover/Pass-Through Switch
The iMcV-LIM 10/100 features a crossover/pass-through push-button switch, 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 push-button IN. A crossover
connection is selected when the push-button is OUT. If it is not clear which
connection is needed, set the push-button to whatever setting makes the twisted pair
LNK LED glow.