Ricoh M281 Series, Service Manual

Page: 952 / 1003

Bit Switches - 5
D255/D256 FAX OPTION 118 SM
0 Effective field limitation for G3
standard function information
0: OFF, 1: 4byte (DIS)
Limits the effective field for standard G3
function information.
1 Switching between G3 standard
and G3 non standard
0: Enable switching
1: G3 standard only
Enables/disables switching between G3
standard and G3 non-standard.
2 Not used Do not change this setting.
3 ECM frame size selection at
transmitting
0: 256byte, 1: 64byte
Selects the ECM frame size for sending.
4 DIS detection times for echo
prevention
0: 1 time, 1: 2 times
Sets the number of times for DIS to detect
echoes.
5 CTC transmission selection
0: PPRx1
1: PPRx4
When "0" is selected, the transmission
condition is decided by error frame
numbers.
When "1" is selected, the transmission
condition is based on the ITU-T method.
6 Shift down setting at receiving
negative code
0: OFF, 1: ON
Selects whether to shift down when
negative codes are received.
7 Not used Do not change this setting.
IP Fax Switch 04 (SP No. 1-111-005)
No. Function Comments
0-3 TCF error threshold Sets the TCF error threshold level. [00 to 0f]
The default is "1111" (0fH).
4-7 Not used Do not change these settings.
IP Fax Switch 05 (SP No. 1-111-006)
No. Function Comments