Re: Internal Modems

Vladimir Dergachev (vdergach@sas.upenn.edu)
Sun, 24 Jan 1999 14:28:55 -0500 (EST)


Actually not all "winmodems" lack DSP. What all of them lack is a
processor that controls it (and responds to AT commands). So one has to
program the dsp which doesn't take that much processing power.

You can distinguish these two kinds of modems by the label on the box -
some of them require a Pentium 100 to run, but some don't. thought both
are marked for Windows only.

Vladimir Dergachev

On Sun, 24 Jan 1999, Edward S. Marshall wrote:

> On Sun, 24 Jan 1999, Adam Goldstein wrote:
> > I take it that WinModems simply won't work under Linux? Is there any way
> > around this?
>
> This should be in the FAQ. This should -really- be in the FAQ. Richard?
> (You're listed as a contact for the LKML FAQ...)
>
> The problem is the lack of specifications for this hardware. Most
> companies producing so-called "WinModems" refuse to provide specifications
> which would allow non-Microsoft operating systems to use them.
>
> The basic issue is that they don't work like a traditional modem; they
> don't have a DSP, and make the CPU do all the work. Hence, you can't talk
> to them like a traditional modem, and you -need- to run the modem driver
> as a realtime task, or you'll have serious data loss issues under any kind
> of load. They're simply a poor design.
>
> > I recently sold a nice P2/300 to someone with a lucent 56k D/F/V pci
> > modem in it... which under windows loads as an lt winmodem... I need to
> > get this guy up& running, and I wasn't aware of a winmodem compatability
> > issue.. Don't wanna have him return it cause of a silly modem ;)
>
> Um, did the "Win" in "WinModem" not point something out to you? ;-)
>
> > Any Thoughts?
>
> More seriously, contact Lucent and see if they'll provide you with
> programming specifications for the card. If they will, without an NDA,
> tell linux-kernel about it; with as much as this question gets asked,
> you'd probably have numerous offers to write a driver.
>
> Alternatively, pay $40 and get him supported hardware (that's what we just
> paid for an OEM V.90 Supra).
>
> <DIV MODE=RANT>
> Anyone who buys hardware for Linux without checking any relavent hardware
> howto's (of which there are plenty; RedHat maintains one, there's a
> standalone "HARDWARE-HOWTO", etc) and doesn't even make a cursory effort
> to see if the hardware will be supported has bought their own problem if
> they can't develop a driver for it.
> </DIV>
>
> --
> Edward S. Marshall <emarshal@logic.net> [ What goes up, must come down. ]
> http://www.logic.net/~emarshal/ [ Ask any system administrator. ]
>
> Linux labyrinth 2.2.0-final #1 Sat Jan 23 01:13:17 CST 1999 i586 unknown
> 12:20pm up 1 day, 1:56, 3 users, load average: 0.02, 0.01, 0.00
>
>
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