Ricoh C2000 Service Manual page 80

G3 Switch 02 [SP No. 1-105-003]
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
G3 Switch 03 [SP No. 1-105-004]
No FUNCTION
DIS detection number
(Echo countermeasure)
0
0: 1
1: 2
1 Not Used
V.8 protocol
2 0: Disabled
1: Enabled
ECM frame size
3 0: 256 bytes
1: 64 bytes
CTC transmission conditions
0: After one PPR signal received
4
1: After four PPR signals received
(ITU-T standard)
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.
0: V.8/V.34 communications will not be possible.
Note:
Do not set to 0 unless the line condition is always bad
enough to slow down the data rate to 14.4 kbps or lower.
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.
NTransmit- Number of transmitted frames
Bit Switches
4
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