Ricoh D009 Service Manual page 1047

line.
Immediate Transmission
The base copier's scanner scans the original at the resolution agreed with the receiving
terminal. The IPU video processes the data and transfers it to the FCU.
When scanning a fax original, the IPU uses the MTF, independent dot erase and
thresholding parameter settings programmed in the fax unit's scanner bit switches,
not the copier's SP modes.
Then the FCU stores the data in page memory, and compresses the data for transmission.
The NCU transmits the data to the line.
JBIG Transmission
Memory transmission: If the receiver has JBIG compression, the data goes from the
DCR to the QM-Coder. Then the NCU transmits the data to the line. When an optional
G3 unit (SG3) is installed and PSTN2 is selected as the line type, JBIG compression is
available, but only for the PSTN-2 line.
Immediate transmission: If the receiver has JBIG compression, the data goes from
the page memory to the QM-Coder. Then the NCU transmits the data to the line. When
an optional G3 unit (SG3) is installed and PSTN2 is selected as the line type, JBIG
compression is available, but only for the PSTN-2 line.
Adjustments
Priority for the line used for G3 transmissions (PSTN 1/PSTN 2 or 3): System switch 16 bit
1
SM 157
Video Data Path
D346