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1.
Locate the lower of the two toggle switches on the front panel
of the Model 1140RC and move it to the right. This will
activate the V.52 BER test mode and transmit a "511" test
pattern to the other unit. If any errors are present, the
receiving modem's red "Error" LED will blink sporadically.
Note: For this independent test to function, the "511" switch on
both Model 1140RCs must be turned on.
2.
If the test indicates no errors are present, move the V.52
toggle switch to the left, thus activating the "511/E" test with
periodic errors present. If the test is working properly, the
receiving modem's red "Error" LED will blink regularly . A
successful "511/E" test will confirm that the link is in place, and
that the Model 1140RC's built-in "511" generator and detector
are working properly.
17
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