206
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-4500
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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