Ricoh A230, Руководство по обслуживанию, Страница: 799 / 1134

DEDICATED TRANSMISSION PARAMETERS
4-74
A230/A231/A232 SM
4.4.2 PARAMETERS
The initial settings of the following parameters are all FF(H) - all the parameters are
disabled.
Switch 01
FUNCTION AND COMMENTS
CCITT T1 time (for PSTN G3 mode)
If the connection time to a particular terminal is longer than the NCU parameter setting ,
adjust this byte. The T1 time is the value stored in this byte (in hex code), multiplied by 1
second.
Range:
1 to 127 s (01h to 7Fh)
00h or FFh - The local NCU parameter factory setting is used.
Do not program a value between 80h and FEh.
Switch 02
No FUNCTION COMMENTS
0
to
4
Tx level
Bit 4 3 2 1 0
Setting
0 0 0 0 0 0
0 0 0 0 1 -1
0 0 0 1 0 -2
0 0 0 1 1 -3
0 0 1 0 0 -4
:
:
0 1 1 1 1 -15
1 1 1 1 1 Disabled
If communication with a particular remote terminal
often contains errors, the signal level may be
inappropriate. Adjust the Tx level for
communications with that terminal until the results
are better.
When disabled, the NCU parameter 01 setting is
used.
Note: Do not use settings other than listed on the
left.
5
to
7
Cable equalizer
Bit 7 6 5
Setting
0 0 0 None
0 0 1 Low
0 1 0 Medium
0 1 1 High
1 1 1 Disabled
Use a higher setting if there is signal loss at
higher frequencies because of the length of wire
between the modem and the telephone exchange
when calling the number stored in this
Quick/Speed Dial.
Also, try using the cable equalizer if one or more
of the following symptoms occurs.
•
Communication error with error codes such as
0-20, 0-23, etc.
•
Modem rate fallback occurs frequently.
Note: Do not use settings other than listed on the
left.