Ricoh Aficio MP C3001 Service Manual page 1961

Address
Voltage setting to detect off-hook for
voltage/DP detection for an
externally connected line.
Here is a summary of the fixed voltage settings (1:
Fixed) for an externally connected line.
Bit 7 Bit 6
6805E3
0 0
0 0
0 0
1 0
1 1
Bit 1 sets the level of
the call signal, Bit 3
6805E4
sets the call signal
impedance
SM
Function
0: Auto
1: Fixed V
Bit 5 Bit 4 -
0 0 Not used
0 1 2.75 V
1 0 5.5 V
0 0 22 V
1 1 41.25 V
0 RT=0 (Low)
Bit 1
1 RT=1 (High)
0 RZ=0 (High)
Bit 3
RZ=1
1
(Composite)
157
NCU Parameters
Unit Remarks
Do not change these
settings
-
D545