Current winmodems fall into two classes; DSP modems and HSP (Host signal
processing modems) modems. The DSP modems have a on board Digital Signal
Processor which does most of the work, like the IBM modem you described. The
HSP modems leave it up to the CPU to do the decoding. The PC Tel modem is a
HSP modem and the ESS & Lucent modems are DSP modems.
>From: Shachar Shemesh <[EMAIL PROTECTED]>
>To: linux mailing list <[EMAIL PROTECTED]>
>Subject: Re: Modem...
>Date: Thu, 31 Aug 2000 08:56:30 +0200
>
>One addition to Gilad's explanation:
>
>Under the Linmodem site you can find, listed as WinModem, the IBM MWave
>series of
>cards. I happen to know this card (my company used to beta-test this card -
>before
>your time Gilad). This card has all the processing power on card to do all
>its
>tasks (that is - Modem, soundcard and, in some versions, TV digitizer). The
>only
>thing lacking is a ROM with the firmware to do so.
>
>When the computer is loaded, the driver identifies the card, and pushes the
>instructions to the on-board DSP to be whatever you want. I have seen an
>MWave
>card that was bought as a non-PnP 28800 modem, and with driver only updates
>ended
>being a PnP 33600 modem. The CPU did not do all the hard work in this case.
>
>I will mention one other thing here. The MWave series were pretty unique,
>and were
>discontinued long before WinModem ever came out. It is highly likely that
>Gilad's
>explanation regarding CPU usage is correct for all WinModems except the
>MWave
>series.
>
>You may ask yourself, at this stage, why did IBM discontinue the line? The
>reason
>has to do with the great internal organization IBM has. The single MWave
>DSP chip
>was shipped on at least three different boards with incompatible
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