Ricoh B051 Service Manual page 478

BIT SWITCHES
G3-2 Switch 03
No FUNCTION
0
DIS detection number
(Echo countermeasure)
0: 1
1: 2
1 Not used
2 V.8 protocol
0: Disabled
1: Enabled
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)
5
Modem rate used for the next
page after receiving a negative
code (RTN or PIN)
0: No change
6 Not used
7 Not used
G3-2 Switch 04
No FUNCTION
0 Training error detection
to threshold
3
4-7 Not used
B502
CÓPIA NÃO CONTROLADA
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.
N Transmit N
N
Transmit-
N
Resend
1: When using ECM, the machine sends a CTC to
drop back the modem rate after receiving four
PPRs.
PPR, CTC: These are ECM protocol signals.
This bit is not effective in V.34 communications.
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.
1: Fallback
Do not change the settings.
Do not change the settings.
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.
Do not change the settings.
88
CÓPIA NÃO CONTROLADA
COMMENTS
≤ Re
send
Number of transmitted frames
- Number of frames to be retransmitted
COMMENTS
SP No. 1-106-004
SP No. 1-106-005
SM