Ricoh D131 Service Manual page 1050

No Function
0-3 Not used
DIS frame length
4
0: 10 bytes 1: 4 bytes
5 Not used
Forbid CED/AMsam output
6 0: Off
1: On (Forbid output)
7 Not used
No Function
G3 protocol mode used
0 0: Standard and non-standard
1: Standard only
1-6 Not used
Short preamble
7
0: Disabled 1: Enabled
D619
G3-2 Switch 01 (SP No. 1-106-002)
Do not change the settings.
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).
Do not change the setting.
Do not change this setting (Default: 0: Off),
unless communication problem is caused by a
CED or ANSam transmission.
Do not change the setting.
G3-2 Switch 02 (SP No. 1-106-003)
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)
Do not change the settings.
Refer to Appendix B in the Group 3 Facsimile
Manual for details about Short Preamble.
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