Ricoh LD013, Service Manual

Page: 461 / 513

BIT SWITCHES
B404 5-44 SM
G3 Switch 0D
No FUNCTION COMMENTS
0-1 Not used Do not change the settings.
2
to
5
Data rate threshold during V.34
reception
Bit 5 4 3 2 Setting
0 0 0 0 Normal
:
0 1 1 1 Lower by
one step
:
1 1 1 1 Lower by
two steps
The machine changes the modulation parameters in
the MPh signal to lower the initial modem rate
during V.34 reception. If this switch is set to “0111”,
the machine lowers the initial speed one step, for
example, from 28,800 to 26,400 bps.
This switch reduces transmission time if the
machine frequently sends PPR signals during V.34
reception.
6 Not used Do not change the setting.
7 B signal detection time for V.34
polling transmission
0: 75 ms (default setting)
1: 65 ms Change this switch only when there are
communication errors during V.34 polling
transmission to a machine with a Panasonic
modem.
G3 Switch 0E
No FUNCTION COMMENTS
0
to
7
CNG transmission OFF interval
To input a value more than 3 s,
use bits 3 to 0, and keep bits 4
to 7 at 0
3000 + 50 x N ms
To input a value less than 3 s,
use bits 4 to 7, and keep bits 0
to 3 at 1
3000 – 50 x N ms
Examples.
3100 ms: 50 x 2 = 100
Bits 4 to 7 must be 0
Bits 0 to 3 must be 2(H)
So, enter 02H
2800 ms: 50 x 4 = 200
Bits 0 to 3 must be F(H)
Bits 4 to 7 must be 4(H)
So, enter 4FH
G3 Switch 0F
No FUNCTION COMMENTS
0 Alarm when an error occurred
in Phase C or later
0: Disabled
1: Enabled If the customer wants to hear an alarm after each
communication that had an error, change this bit to
“1”.
1 Alarm when the handset is off-
hook at the end of
communication
0: Disabled
1: Enabled If the customer wants to hear an alarm if the
handset is off-hook at the end of fax communication,
change this bit to “1”.
2-7 Not used Do not change the settings.