Black Box LMC7002A-R4, LMC7006A, LMC7005A, LMC7003A-R4 LED Indicators, Installation Troubleshooting

L I N K F A U L T D E T E C T I O N F E A T U R E

Link Fault Detection 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 10/100 Autosensing Media Converter, the transmitter output on that interface is turned off for about 425ms every 3.8 seconds (i.e. blinking). It applies to both network interfaces and to both data rates. If the link at the other interface to the 10/100 Autosensing Media Converter is also down, there is no output. LFD causes the Link Up indicator of the link partner to blink.

When the 10/100 Autosensing Media Converter is in one of the Force modes, enable LFD by setting S5 to the ON position. Disable LFD (default) by setting S5 to the OFF position. In order for LFD to function properly, Force mode must be enabled by setting S7 to ON with either S8 ON for 10 Mbps or S8 OFF for 100 Mbps. NOTE: S6 must also be ON when enabling LFD.

NOTE

When using the LFD feature, if the DIP switches are in any other combination than listed above, your 10/100 media converter may exhibit erratic behavior.

T W I S T E D P A I R C R O S S O V E R / P A S S - T H R O U G H S W I T C H

The 10/100 Autosensing Media Converter 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 (see page 1 for illustration of location).

Select a pass-through connection by pressing the push-button IN. A cross- over connection is selected when the push-button is OUT. If you are not sure which connection is needed, set the push-button to whatever setting makes the twisted pair LNK (link) LED glow.

LED Indicators

The 10/100 Autosensing Media Converter features several diagnostic LEDs per port. The LED functions for the media converter are:

T W I S T E D P A I R P O R T

LNK Glows green when a twisted pair link is established. ACT Glows yellow when data is detected on the port.

100Glows yellow when 100 Mbps data is detected on the port. LFD Glows green when Link Fault Detection is enabled.

(NOTE: This feature is only available when either Force -10 or Force-100 mode is enabled. Refer to the LFD LED Activity section for more information.)

AN Glows green when Auto-Negotiation/PNPmode is enabled. PWR Glows green when unit has power.

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F I B E R P O R T

100Glows yellow when 100 Mbps data is detected on the port. ACT Glows green when data is detected on the port.

LNK Glows green when a fiber link is established.

NOTE

Twisted pair AND fiber optic cables must be connected, and the twisted pair crossover/ pass-through switch set correctly, before either LNK LED will glow solid.

L I N K F A U L T D E T E C T I O N L E D A C T I V I T Y

When LFD is enabled and a fault occurs on a segment of the media conversion, the various Link LEDs in that conversion will either blink or extinguish. LEDs may react differently depending on the type of end devices in the conversion, whether the 10/100 Autosensing Media Converter is in Force-10or Force-100mode, where the fault occurs, etc. For questions, please contact Technical support.

Installation Troubleshooting

•During installation, first test the fiber and twisted pair connections with all troubleshooting features disabled, then enable these features, if desired, just before final installation. This will reduce the features’ interference with testing.

•When working with units where the features cannot be disabled, you must establish BOTH your twisted pair and fiber connections before the link LEDs will light!

•To test a media converter by itself, first make sure you have an appropriate fiber patch cable, then follow these steps to test:

Step 1: Connect the media converter to the twisted pair device with a twisted pair cable.

Step 2: Loop a single strand of fiber from the transmit port to the receive port of your media converter.

Step 3: Verify that you have both twisted pair and fiber link (see LED Operation section, page 4)) on your media converter.

NOTE: Use caution when conducting a loopback test; it is possible to create a network loop if connecting the media converter’s twsited pair port to an active network. IMC Networks recommends connecting the twisted pair cable to a PC when performing this type of test.

•Make sure to use the appropriate twisted pair cable, and have the crossover/pass-through switch set correctly if your media converters do not include AutoCross.

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