154
UF-5500 / 4500
11.2.7. Communications
This section explains general troubleshooting procedures for the 400 series of Information Codes. These
errors are primarily caused by poor telephone line quality (loss, noise, echo, etc.). This unit is furnished with
Service Mode 1 to assist in troubleshooting line quality problems.
It is suggested that both the transmitting unit and receiving unit be adjusted. This section gives relevant
parameters in Service Mode 1 for the transmitting and receiving sides. If no improvement is realized after
the parameters are adjusted, it is recommended that the parameters be returned to the default settings.
11.2.7.1. Communication Trouble
START
No
Yes
Is this an international
#021 : Off
On
#025 : 1st
2nd
#018 : 14400 bps
12000 to 2400 bps
#024 : 2100 Hz
1080 Hz
#030 : 75 ms
#033 : 33600 bps
31200 to 2400 bps/
TC9600/TC7200
1 sec
communication?
Transmitting Side
Receiving Side
#010 : -9 dBm
0 to -15 dBm
To improve a poor S/N (signal-to-noise ratio).
#017 : 14400 bps
12000 to 2400 bps
#011 : -43 dBm
-33 dBm or -38 dBm
#018 : 14400 bps
#019 : On Off
12000 to 2400 bps
Transmitting Side
Receiving Side
Receiving Side
To equalize loss (Amplitude Distortion) between the fax unit,
and the phone company exchange.
#025 : 1st
2nd
1080 Hz
#030 : 75 ms 1 sec
To cope with shifted signal sequences caused by an echo.
#070 : 128
256 to 2048
To cope with impulse noise.
Receiving Side
Perform a communication test after changing settings.
Transmitting Side
Receiving Side
Transmitting Side
#014 : 0 dBm
4, 8, 12 dBm
#013 : 0 dBm
4, 8, 12 dBm
#033 : 33600 bps
31200 to 2400 bps
#023 : Normal
Long
#033 : 33600 bps
31200 to 2400 bps
#024 : 2100 Hz
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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