Ricon B156, Service Manual

Page: 689 / 781

BIT SWITCHES
SM 75 B750
Fax Op
tion
Type 32
32
B75
0
G3 Switch 03 SP No. 1-105-004
No FUNCTION COMMENTS
0 DIS detection number
(Echo countermeasure)
0: 1
1: 2
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.
1 V.8 protocol in manual
reception
0: Disabled
1: Enabled
0: The machine sends CED instead of ANSam
when starting a manual reception.
1: The machine sends ANSam during manual
reception.
2
V.8 protocol
0: Disabled
1: Enabled
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.
3 ECM frame size
0: 256 bytes
1: 64 bytes
Keep this bit at “0” in most cases.
4
CTC transmission conditions
0: Ricoh mode (PPR x 1)
1: ITU-T mode (PPR x 4)
When using ECM, the machine will choose a slower
modem rate after receiving PPR once (Ricoh mode)
or four times (ITU-T mode).
This bit is ineffective in V.34 communications.
5 Modem rate used for the next
page after receiving a negative
code (RTN or PIN)
0: No change 1: Fallback
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.
6 V.8 protocol in manual
transmission
0: Disabled
1: Enabled
1: The machine detects either ANSam or CED
during manual transmission.
7 Not used Do not change the setting.
G3 Switch 04 SP No. 1-105-005
No FUNCTION COMMENTS
0
to
3
Training error detection
threshold 0 - F (Hex); 0 - 15 bits
If the number of error bits in the received TCF is
below this threshold, the machine informs the
sender that training has succeeded.
4-7 Not used Do not change the settings.