Ricoh M281 Series, Service Manual

Page: 940 / 1003

Bit Switches - 4
D255/D256 FAX OPTION 106 SM
No Function Comments
0-3 Not used Do not change the settings.
4 DIS frame length
0: 10 bytes 1: 4 bytes
1: The bytes in the DIS frame after the 4th byte
will not be transmitted (set to 1 if there are
communication problems with PC-based faxes
which cannot receive the extended DIS frames).
5 Not used Do not change the setting.
6 Forbid CED/ANsam output
0: Off
1: On (Forbid output)
Do not change this setting (Default: 0: Off),
unless communication problem is caused by a
CED or ANSam transmission.
7 Not used Do not change this setting.
G3 Switch 02 (SP No. 1-105-003)
No Function Comments
0 G3 protocol mode used
0: Standard and non-standard
1: Standard only
Change this bit to 1 only when the other end can
only communicate with machines that send
T.30-standard frames only.
1: Disables NSF/NSS signals (these are used in
non-standard mode communication)
1-6 Not used Do not change the settings.
7 Short preamble
0: Disabled 1: Enabled
Refer to Appendix B in the Group 3 Facsimile
Manual for details about Short Preamble.
G3 Switch 03 (SP No. 1-105-004)
No Function Comments
0 DIS detection number
(Echo countermeasure)
0: 1
1: 2
0: The machine will hang up if it receives the
same DIS frame twice.
1: Before sending DCS, the machine will wait for
the second DIS which is caused by echo on the
line.
1 Not Used Do not change the settings.