Ricoh B230 Service Manual page 1040

Bit Switches
Communication Switch 01 [SP No. 1-104-002]
No FUNCTION
ECM
0
0: Off 1: On
1 Not used
Wrong connection prevention
method
Bit 3: 0, Bit 2: 0 = None
2-3
Bit 3: 0, Bit 2: 1 = 8 digit CSI
Bit 3: 1, Bit 2: 0 = 4 digit CSI
Bit 3: 1, Bit 2: 1 = CSI/RTI
4-5 Not used
Maximum printable page
length available
Bit 7: 0 Bit 6: 0 = No limit
6-7
Bit 7: 0 Bit 6: 1 = B4 (364 mm)
Bit 7: 1 Bit 6: 0 = A4 (297 mm)
Bit 7: 1 Bit 6: 1 = Not used
Communication Switch 02 [SP No. 1-104-003]
No FUNCTION
G3 Burst error threshold
0
0: Low 1: High
B786
COMMENTS
If this bit is set to 0, ECM is switched off for all
communications.
In addition, V.8 protocol and JBIG compression
are switched off automatically.
Do not change the settings.
(0,1) - The machine will disconnect the line
without sending a fax message, if the last 8 digits
of the received CSI do not match the last 8 digits
of the dialed telephone number. This does not
work when manually dialed.
(1,0) - The same as above, except that only the
last 4 digits are compared.
(1,1) - The machine will disconnect the line
without sending a fax message, if the other end
does not identify itself with an RTI or CSI.
(0,0) - Nothing is checked; transmission will
always go ahead.
This function does not work when dialing
is done from the external telephone.
Do not change the setting.
The setting determined by these bits is informed
to the transmitting terminal in the pre-message
protocol exchange (in the DIS/NSF frames).
COMMENTS
If there are more consecutive error lines in the
received page than the threshold, the machine will
send a negative response. The Low and High
threshold values depend on the sub-scan
resolution, and are as follows.
100 dpi
6(L) 12(H)
200 dpi
12(L)
300 dpi
18(L)
400 dpi 24(L)
68
24(H)
36(H)
48(H)
SM