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RE: Supra 33.6k Modem drivers.

Posted on 2000-04-15
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Last Modified: 2013-12-27
I have Diamond SupraFax Modem 33.6 external.

this modem does work as a standard modem 28.8 but it would works alot better using its proper drivers.

I require NT4.0 drivers and 95/98 drivers would be even better, As I sometimes use this modem on all 3 OSs

Thanks

 

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Question by:MAVERICK
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Otta earned 100 total points
ID: 2719690
> it would work better using its proper drivers.

Not necessarily.
DSP (Digital Signal Processing) modems are meant to be used at the "factory" settings.

So, if you are using 'AT&F1' (3COM/USR modems) or 'AT&F' (all other modems), you will get "optimal" data-transmission rates.

Anyway, access:

http://WWW.DiamondLegacy.com/products/drivers/driver-index.htm 

and click on the link labelled:

INF Driver Files for Supra 288/336/56K Modems

and prove me wrong.  :-)
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by:MAVERICK
ID: 2720383
otta, I've used it as a standard modem, what makes me ask about the drivers is that NT RAS shows very low compression ratio's on download.

I'll download the drivers tonight
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Expert Comment

by:Otta
ID: 2720659
> shows very low compression ratio's on download.

That depends on the "compressability" of your specific data -- the "factory-setting" for the modem should be enabling the compression-feature of the modem; since compression is being reported, it seems like the modem is doing (some) compression.
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Author Comment

by:MAVERICK
ID: 2721475
Actually the compression is the same with the new drivers (WinNT)
but I have another strange problem, NT reports more "CRC" errors since I changed the drivers. I think it may be due to the modem not reporting them as a standard modem? any comment
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Expert Comment

by:Otta
ID: 2723398
> NT reports more "CRC" errors
> I think it may be due to the modem

CRC == Cyclic Redundancy Check

When a packet is sent, some additional information (a "check-sum") is calculated, and is sent with the packet.

When a packet is received, the "check-sum" is recalculated, and is compared with the received "check-sum".
Any difference is a "CRC-error",
and indicates that the packet was corrupted in transmission, i.e., through the telephone-lines, or elsewhere.

Check that you've configured your modem for "hardware handshake", so that no information is "lost" between your modem and your COM port.

Other than getting your telephone-company to replace their wires from your home to their Central Office, you're stuck with the "quality" of those copper-wires.
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