Ricoh A250 Service Manual page 526

DEDICATED TRANSMISSION PARAMETERS
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
ITU-T 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:
0 to 120 s (00h to 78h)
FFh - The local NCU parameter factory setting is used.
Do not program a value between 79h and FEh.
Switch 02
No FUNCTION
0 Tx level
to Bit 4 3 2 1 0 Setting
4 0 0 0 0 0
0 0 0 0 1
0 0 0 1 0
0 0 0 1 1
0 0 1 0 0
:
:
0 1 1 1 1
1 1 1 1 1 Disabled
5 Cable equalizer
to Bit 7 6 5
7 0 0 0
0 0 1
0 1 0
0 1 1
1 1 1
A250
If communication with a particular remote terminal
often contains errors, the signal level may be
0 inappropriate. Adjust the Tx level for
-1 communications with that terminal until the results
-2 are better.
-3
-4 If the setting is 'Disabled', the NCU parameter 01
setting is used.
-15 Note: Do not use settings other than listed on the
Use a higher setting if there is signal loss at
Setting higher frequencies because of the length of wire
None between the modem and the telephone exchange
Low when calling the number stored in this
Medium Quick/Speed Dial.
High
Disabled
Also, try using the cable equalizer if one or more
of the following symptoms occurs.
•
•
Note: Do not use settings other than listed on the
If the setting is 'Disabled', the bit switch setting is
used.
COMMENTS
left.
Communication error with error codes such as
0-20, 0-23, etc.
Modem rate fallback occurs frequently.
left.
4-64 SM