21 December, 2001
BIT SWITCHES
3-41
Service
Tables
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.
