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UF-5500 / 4500
11.3.5. Information Codes: 408, 409, 417, 418, 490
START
END
Is communication with
the reference unit
successful?
Is the unit transmitting or
receiving?
Yes
Transmitting
Receiving
No
Yes
No
Change Function
Parameter #018: Reduce
Rx Modem Speed
Does the problem still occur?
Replace the MAIN PCB.
Does the problem still
occur?
Change Function
Parameter #013: Increase
G3 Rx Equalization
Does the problem still
occur?
END
Does the problem still
occur?
Yes
Yes
No
Change Function
Parameter #071: Increase
Error Tolerance
Change Function
Parameter #011: Reduce
Rx Sensitivity Level
Does the problem still
occur?
No
No
Yes
Yes
No
Does the problem still
occur?
Change Function
Parameter #010: Reduce
Tx Attenuation Level
Change Function
Parameter #017: Reduce
Tx Modem Speed
The telephone line may have
a high level of white noise
and/or frequent impulse noise.
Ask the telephone company
to check the line.
Does the problem still
occur?
No
Yes
Yes
Yes
No
Check the telephone line
condition.
Change Function
Parameter #014: Increase
G3 Tx Equalization
Does the problem still
occur?
No
Summary of Contents for UF-5500
Page 180: ...180 UF 5500 4500...
Page 248: ...248 UF 5500 4500 13 5 Test Chart 13 5 1 ITU T No 1 Test Chart...
Page 249: ...249 UF 5500 4500 13 5 2 ITU T No 2 Test Chart...
Page 281: ...281 UF 5500 4500 10 10 11 15 12 17 18 19 20 21 22 23 24 28 29 30 27 25 26 21 13 14 16 30...
Page 287: ...287 UF 5500 4500 130 131 132 133 134 135 136 137 138 139 140 141 PCB2 A UF 5500 only CN1...
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Page 311: ...311 UF 5500 4500 501 502 503 504 506 507 505 508 509 511 510 514 513 512 P51 P53 P54 A51 P52...
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