Ricoh Aficio MP2550B Service Manual page 837

No Function
0: Disabled
1: Enabled
6 Not Used
Short preamble
7
0: Disabled 1: Enabled
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
4 received
1: After four PPR signals
received (ITU-T standard)
SM
G3 Switch 02 (SP No. 1-105-003)
for communications with the same machine when
determining the most suitable rate for the current
communication.
Do not change the settings.
Refer to Appendix B in the Group 3 Facsimile
Manual for details about Short Preamble.
G3 Switch 03 (SP No. 1-105-004)
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.
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.
103
Bit Switches
Comments
Comments
D361