Ricoh IM C300 Service Manual page 1560

Bit Switches – 4
6 Forbid
CED/ANsam
output
0: Off
1: On (Forbid
output)
7 Not used
G3 Switch 02 (SP No. 1-105-003)
No Function
0 G3 protocol mode
used
0: Standard and
non-standard
1: Standard only
1- Not used
6
7 Short preamble
0: Disabled 1:
Enabled
G3 Switch 03 (SP No. 1-105-004)
No Function
0 DIS detection number
(Echo countermeasure)
0: 1
1: 2
1- Not Used
2
3 ECM frame size
0: 256 bytes
1: 64 bytes
4 CTC transmission conditions
0: After one PPR signal
received
1: After four PPR signals
received (ITU-T standard)
SM
Do not change this setting (Default: 0: Off), unless communication problem
is caused by a CED or ANSam transmission.
Do not change this setting.
Comments
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.
Comments
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.
Do not change the settings.
Keep this bit at "0" in most cases.
0: When using ECM in non-standard (NSF/NSS) mode, the
machine sends a CTC to drop back the modem rate after
receiving a PPR, if the following condition is met in
communications at 14.4, 12.0, 9.6, and 7.2 kbps.
85 D0CK