Ricoh D023, Service Manual, Page: 1437 / 1522

Bit Switches
D393 96 SM
Communication Switch 01 [SP No. 1-104-002]
No FUNCTION COMMENTS
0
ECM
0: Off 1: On
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.
1 Not used Do not change the settings.
2-3
Wrong connection prevention
method
Bit 3: 0, Bit 2: 0 = None
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
(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.
ƒ
This function does not work when dialing
is done from the external telephone.
4-5 Not used Do not change the setting.
6-7
Maximum printable page
length available
Bit 7: 0 Bit 6: 0 = No limit
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
The setting determined by these bits is informed to
the transmitting terminal in the pre-message
protocol exchange (in the DIS/NSF frames).
Communication Switch 02 [SP No. 1-104-003]