Oki OKIFAX 5750 Maintenance Manual page 348

Test other fax machine under the same
conditions, especially concerning step 1-4.
The hardware of the troubled fax machine
may be damaged.
Go to 7.13 (High-speed Modem Test)
to localize the cause.
41285901TH Rev.3
A
Do they receive normally?
Yes
No
Check the line and the network.
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