Brother DCP375CW Service Manual page 498

Selector
Function
No.
1
Not used.
2
3
| Masking of symbol rate(s)
8
Note: WSW40 takes effect only when the V.34 mode is permitted (WSW19, selector 7) in
models supporting V.34 mode.
• Selectors 3 through 8: Masking of symbol rate(s)
These selectors allow you to limit the transmission speed range in V.34 mode by masking
the desired symbol rate(s). Transmission speeds assigned to the symbol rates are listed on
the next page. The setting made by these selectors will limit the setting made by selectors 1
through 4 on WSW39.
If selector 3 is set to "1" to mask the 3429 symbols/second when the first transmission
speed choice is 33,600 bps (specified by selectors 1 through 4 of WSW39), for example,
then the allowable maximum transmission speed will be limited to 31,200 bps. If selector 8
is set to "1" to mask the 2400 symbols/second when the first transmission speed choice is
33,600 bps, then the allowable maximum transmission speed remains 33,600 bps.
If selector 8 is set to "1" to mask the 2400 symbols/second when the first transmission
speed choice is 21,600 bps (specified by selectors 1 through 4 on WSW39), then the
allowable maximum transmission speed remains 21,600 bps but the minimum transmission
speed will be limited to 4,800 bps.
Symbol rate Transmission speed
(bps)
2400 2,400
4,800
7,200
9,600
12,000
14,400
16,800
19,200
21,600
2800 4,800
7,200
9,600
12,000
14,400
16,800
19,200
21,600
24,000
26,400
WSW40
(V.34 modem settings)
Not masking Masking
No. 3
No. 4
No. 5
No. 6
No. 7
No. 8
Symbol rate Transmission speed
(bps)
3000 4,800
7,200
9,600
12,000
14,400
16,800
19,200
21,600
24,000
26,400
28,800
3200 4,800
7,200
9,600
12,000
14,400
16,800
19,200
21,600
24,000
26,400
28,800
31,200
App. 4-45
Setting and Specifications
0 1 3429 symbols/sec
0 1 3200 symbols/sec
0 1 3000 symbols/sec
0 1 2800 symbols/sec
- - Not used.
0 1 2400 symbols/sec
Symbol rate
3429
sec.: second(s)
Transmission speed
(bps)
4,800
7,200
9,600
12,000
14,400
16,800
19,200
21,600
24,000
28,800
31,200
33,600
Confidential