Konica Minolta bizhub 4020 Service Manual page 174

Actions
Step 2
Properly connect the phone line to the modem board and
to the wall jack.
Did this fix the problem?
Step 3
Check for a dial tone.
Is there a dial tone?
Step 4
Use a telephone to test the phone line's ability to send and
receive calls.
Did the phone line work properly?
Step 5
Use a telephone handset to verify the phone line is free of
static or external noise.
Is the phone line noise-free?
Step 6
Use the MFP on a properly functioning phone jack.
Did this fix the problem?
Step 7
In <diags / config menu>, verify that the Enable Fax
Receive setting is On.
Is the setting set to On?
Step 8
Set "Enable Fax Receive" to On.
Did this fix the problem?
Step 9
Is Distinctive Ring enabled?
Step 10
Turn on Distinctive ring.
Did this fix the problem?
Step 11
Is the phone line analog?
bizhub 4020/3320 Service Manual
Yes
The problem is solved.
Go to step 4.
Go to step 7.
Go to step 7.
The problem is solved.
Go to step 9.
The problem is solved.
Go to step 11.
The problem is solved.
Go to step 13.
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No
Go to step 3.
Go to step 6.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
Go to step 10.
Go to step 11.
Go to step 12.