Ricoh FACSIMILE FAX77, Field Service Manual

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11. Back to Back Test
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Connect the machine to another fax terminal back to back (connect them directly, without using an ex-
change or any type of switching device).
Set bit 0 of bit switch 0 to 1.
Place the other fax machine in back to back mode. For example, if it is another FAX77, FAX80 or FAX85,
set bit 0 of bit switch 0 to 1. See the machine’s field service manual for details.
Place a document in the feeder of one of the machines and press Start on that machine.
Press Start on the other machine.
Check that the document is transmitted correctly.
Repeat the test, but send the document from the other machine.
After testing, reset bit 0 of bit switch 0 to 0. Also, reset the other machine to normal operating mode.
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