Ricoh D072 Service Manual page 631

Dedicated Transmission Parameters
ECM during transmission
Bit 7: 0, Bit 6: 0 = Off
6-7 Bit 7: 0, Bit 6: 1 = On
Bit 7: 1, Bit 6: 0 = Not used
Bit 7: 1, Bit 6: 1 = Disabled
Switch 04 - Not used (do not change the settings)
Switch 05 - Not used (do not change the settings)
Switch 06 - Not used (do not change the settings)
Switch 07 - Not used (do not change the settings)
Switch 08 - Not used (do not change the settings)
Switch 09 - Not used (do not change the settings)
D067/D068/D069/D072
For example, if ECM is switched on but is not
wanted when sending to a particular terminal, use
the (0, 0) setting.
V.8/V.34 protocol and JBIG compression
are automatically disabled if ECM is
disabled.
If the setting is "Disabled", the bit switch
setting is used.
7-92 SM Appendix