Re: Forcing modem connection to 57600 bps
At Tue, 16 Jan 2001 14:26:22 +0200 , Jarkko Niemi <jin@sci.fi> wrote:
>After using my dial-up connecton with speed reporting I wanted to force
>my modem up to it's maximum speed. It works from windows side, so, it's
>just up to configuring it also to Linux. Windows doesn't help, there is
>just one box where to check as "[] use always this speed"
I suspect that that little box is just the speed between your PC & the
modem, not the modem connection speed to your ISP (which will vary
according to line quality, for example). I have never seen a modem
connect at anything over about 52k.
>By the way it's internal ISA modem named
> SupraExpress 56i SP Intl
>
>So, I went to look modem's AT manual and edited /etc/chatscripts/
>I added AT+MS= part just before number dialing.
>I don't know do I use wrong AT command, or are parameters wrong,
>anyway it calls, but not connect.
You've told it not to, I expect :-) What it does is try to connect at
the speed you specify (57600 in your case), can't and so aborts the
connection. This can be quite useful if you set it at, say, 42000 (or
whatever minimum speed you consider acceptable), because it can save you time/money, but if you pay a minimum charge per call then it
might be wasteful (depends on your usage pattern - for example if you
tend to blink on, collect a few emails, and then disconnect its not
worth it, but if you tend to go online for long periods and max out
the line then you will prefer to have the higher speed because it is
more cost effective). The speeds you quote are quite acceptable for a
modem, nothing unusual at all.
Bottom line is, you can't force the modem to get more data than
prevailing conditions allow; get a digital connection (if you can, I
know such are not always available, depending on circumstances) :-)
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