App.1-35
Confidential
■ WSW39 (V.34 transmission speed)
- Selectors 1 through 8: First and last choices of transmission speed for fallback
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 on WSW40.
Selector No. Function Setting and Specifications
1
l
4
First transmission speed choice
for fallback
No. 1 2 3 4
No. 5 6 7 8
0 0 0 0: 2,400 bps
0 0 0 1: 4,800 bps
0 0 1 0: 7,200 bps
0 0 1 1: 9,600 bps
0 1 0 0: 12,000 bps
0 1 0 1: 14,400 bps
0 1 1 0: 16,800 bps
0 1 1 1: 19,200 bps
1 0 0 0: 21,600 bps
1 0 0 1: 24,000 bps
1 0 1 0: 26,400 bps
1 0 1 1: 28,800 bps
1 1 0 0: 31,200 bps
1 1 0 1: 33,600 bps
1 1 1 0: 33,600 bps
1 1 1 1: 33,600 bps
5
l
8
Last transmission speed choice
for fallback
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