Brother FAX-202 Owner's Manual page 86

Transmission Verification Report Prints "Result: NG"
There is probably temporary noise or static on the phone line. Try sending the
fax again. If the problem continues, call the Telephone Company to check your
phone line.
Custom Features on a Single Line
If you have Call Waiting, Caller ID, Ring Master, Voice Mail, an answering
machine, alarm system or any other custom feature on a single phone line with
your fax machine, it may create a problem with sending or receiving fax data
and telephone calls.
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