Brother MFC620CN Service Manual page 417

Selector
No.
1
First transmission speed choice for
|
fallback
4
5
Last transmission speed choice for
|
fallback
8
NOTE: WSW39 takes effect only when the V.34 mode is permitted (WSW19, selector 7) in models
supporting V.34 mode. For the transmission speed setting in other modes, refer to WSW19.
Selectors 1 through 8:
These selectors are used to set the modem speed range. With the first transmission speed choice
specified by selectors 1 through 4, the machine attempts to establish the transmission link via the
modem. If the establishment fails, the machine automatically steps down to the next highest speed
and attempts to establish the transmission link again. The machine repeats this sequence while
stepping down the transmission speed to the last choice specified by selectors 5 through 8.
If the modem always falls back to a low transmission speed (e.g., 24,000 bps), set the first
transmission speed choice to the lower one (e.g., modify it from 31,200 bps to 26,400 bps) in order
to deactivate the high-speed modem function and reduce the training time for shorter transmission
time.
WSW39 will be limited by selectors 3 through 8 of WSW40.
WSW39
(V.34 transmission speed)
Function
First and last choices of transmission speed for fallback
App. 4-42
Setting and Specifications
No. 1 2 3 4
No. 5 6 7 8
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
: 2400 bps
: 4800 bps
: 7200 bps
: 9600 bps
: 12000 bps
: 14400 bps
: 16800 bps
: 19200 bps
: 21600 bps
: 24000 bps
: 26400 bps
: 28800 bps
: 31200 bps
: 33600 bps
: 33600 bps
: 33600 bps
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