Table of Contents
Advertisement
FK-502/Network Fax Service Manual Ver.3.0
B1
:
High-speed signal of one frame length which is sent at the end of a series of startup
sequence in the selected modulation parameter.
Transmitting modem
Receiving modem
(4) Others
(4-1)
Minimum reception signal level (RLSD) (half-duplex mode only)
-
The reception circuit is turned to On when the signal becomes 43 dBm or more
-
When the signal becomes 48 dBm or less, the reception circuit is turned Off within 20 to
25ms after it has exceeded the thresh old.
(4-2)
Data frame structure
All data transmitted in V.34 (after the Phase 4) is treated in the following frame format.
J
:The number of data frames within one super frame
P
:The number of mapping frames within one data frame
Super frame
Data frame
Mapping frame
Four-dimensional symbol
128T
16T
Control channel data
S
S
70 ± 5ms
Control channel data
1
0
40 or 35ms
0
1
J=0
1
1
K=0
Modulation Speed
2400 baud
2743 baud
2800 baud
3000 baud
3200 baud
3429 baud
PP
B1
Data
Main channel
To Control channel re-synchronization / Control channel startup procedure
280ms
...
...
2
3
J
7
8
7
7
7
8
PROTOCOL
Turn-off
35ms
Scrambled 1's
70 ± 5ms
J-1
P-1
P
12
12
14
15
16
15
7-27
Hide quick links:
Advertisement
Table of Contents
