Ricoh M052 Service Manual page 593

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
4 received
1: After four PPR signals
received (ITU-T standard)
Modem rate used for the next
page after receiving a negative
5
code (RTN or PIN)
0: No change 1: Fallback
6 Not Used
Select detection of reverse
polarity in ringing
7
0: Off
1: On
SM
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.
When using ECM in non-standard (NSF/NSS)
mode at 14.4, 12.0, 9.6, and 7.2 kbps;
0: The machine sends a CTC to drop back the
modem rate after receiving a PPR.
1:The machine sends a CTC to drop back the
modem rate after receiving four PPRs.
1: The machine's tx modem rate will fall back
before sending the next page if a negative code is
received. This bit is ignored if ECM is being used.
Do not change the settings
This switch is used to prevent reverse polarity in
ringing on the phone line (applied to PSTN-G3
ringing). Do not change this setting
0: No detection
1: Detection (Japan and Korea only)
87
Bit Switches
M381