Bit Switch 04
FUNCTION
COMMENTS
0
1
Compression modes available in
receive mode
Bit 1 0 Modes
0 0 MH only
0 1 MR or MH
1 0 MR or MH, with
EFC
1 1 MMR, MR, or
MH, with EFC
These bits determine what capabilities are
informed to the transmitting side in the protocol
exchange.
2
Error counting method
0: 10 (20) [40]
1: In accordance with the settings
of bits 3 to 7
The machine counts data errors caused by a
noisy line or defective machine.
0: If the count reaches 10 (Standard mode), 20
(Detail mode), or 40 (Fine mode), the machine
sends RTN to the other end in reply to the post-
message command. As 10 (or 20 or 40) good
lines cause the count to decrement, RTN will
only occur in bad conditions.
3
4
Burst error threshold
Bit 4 3 Threshold
0 0 3 (6) [12]
0 1 4 (8) [16]
1 0 5 (10) [20]
1 1 6 (12) [24]
If there are more consecutive error lines in the
received page than the threshold specified by
these bits, the page is rejected. Values in
parenthesis are for Detail resolution, and those in
square brackets are for Fine resolution.
5
6
7
Error line ratio
Bit 7 6 5 Value
0 0 0 5%
0 0 1 6%
0 1 0 7%
0 1 1 8%
1 0 0 9%
1 0 1 10%
If the number of error lines divided by the total
number of lines reaches the value determined by
the settings of these bits, RTN will be sent to the
other end.
November 30th, 1991
SERVICE TABLES AND PROCEDURES
BIT SWITCHES
4-14
Summary of Contents for FAX500
Page 1: ...FAX550 SERVICE MANUAL...
