On Thu, 17 Aug 2000, Frank Cornew wrote:
> Second, I have had problems getting external modems to
> work decently under OS 8.x since the duo's internal serial hardware
> is a speed bottleneck. You probably will not see the benefit of a 56k
> modem, for instance. Things run OK briefly, then something gets
> saturated, the connection slows down, stops, and then usually times
> out.
This is from lowendmac.net's specs pages for Duos:
Cautions
Serial port limited to 57.6 kbps
Since a modem compresses data before sending, you need the serial port to
be about 4x the speed of your modem for peak performance. A 14.4k modem
requires a 57k serial port, for example. I regularly use a 33.6k modem
with my Duo230. The performance is a little less than I get from the same
modem on a desktop machine with a 230k serial port, but it's very reliable
and stable. If your modem chokes, I'd recomending using AT commands to set
the modem to a slower protocol or something, in which case you might as
well just use a less expensive, slower modem.
Kris Feldmann
http://rotted.com/
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