JDSU NT850 User's Guide download pdf (Page 50)

Chapter 3 Performing Network Tests

Performing Hub Flash Tests

34 LanScaperPRO Network Tester User’s Guide

5 Press the TEST key to begin the test.

The test starts with a voltage check test (see “Notes

About Voltage Checking” on page 20), then attempts

to link at 100 and 10 MB speeds in the hub wiring

mode. If the hub wiring mode fails, the LanScap-

erPRO switches the wiring mode to NIC, and tries the

two speeds again. Each attempt to link at speed and

wiring mode takes 3 seconds, so it takes 12 seconds

to test all modes.

If no link is found, an audio tone signal is sent down

the cable so the cable can be located at the other

end with a tone tracer. The audio tone alternates with

the 12 second link test until a link is found, or the test

is stopped by timeout or the user.

Once a link is established, the LINK LED on the

LanScaperPRO will illuminate, and the link will be

held up for 3 seconds, then dropped for 3 seconds to

blink the link indicator on the device at the other end.

The LanScaperPRO will automatically turn off in 30

minutes.

While the tester is searching for an active link

partner, it displays the message Find Active

Link. Once a link is made, the tester displays Link

Active and the LINK LED flashes. The speed of the

link can be determined by checking if the 100 MB

LED is lit. If the tester loses the link, it reports Lost

Link for several seconds, then returns to the search

for a link partner.

LanScaperPRO_User_Guide.book Page 34 Friday, January 25, 2008 1:14 PM

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JDSU NT850 User's Guide Page 50