External 56K USB Modem can't stay connected

November 24, 2011 at 12:59:39
Specs: Windows Vista, Intel Core2 DUO CPU T6500 @2.10, 4GB ram
I'm stuck out in the boonies with the only option for any kind of internet connection being dial up. I use a lap top, vista x64 OS. My problem is some recent windows update has made my external LSI USB 2.0 Soft Modem unable to maintain a stable connection. It will constantly and randomly drop connection. Before the update this was not happening, it started about a month ago (I live in so can't do my updates until i visit my parents and have access to their wireless). I have since bought another exact same modem type with the same results, tested it on four different phone lines across Quebec (my parents phone line, sisters phone line, friend's phone line). So this leads me to believe its a driver/software issue.

Diamond Supramax External 56K USB Modem (SM56USBV2)
The device is USB\VID_047E&PID_2892&REV_0200 from Diamond Multimedia
Model : SM56USBV2
LSI USB Soft Modem 2.0
DMM1820881 (duno what this number for below the bar code)

Driver Date: Aug 8, 2010

The only way I can get the thing to reestablish any connection is to pull it from one port and insert it into another port ( i can recycle these two ports for it to work so long as its not the same one it just dropped link from). It has constant trouble establishing a connection when it tries to dial out, both modems, all different lines tried all over Quebec.

Any chance of a new driver for this? The last time this type of error occurred there was an updated driver to fix the issue. However there appears to be none out as of now.

Alana Curtis

PS: it can stay connected from 5 secs to 2+ hrs but mostly its between 5 secs and an 30 mins which is extremely annoying.

Upon some digging, as the modem was a gift, I discovered the device was not listed as compatible for the 64x version of vista (is compaticble for the vista 32 however) yet it was working just fine for 5+ months prior to this.

Intel Core2 Duo CPU T6500 @2.10 Ghz, 4GB ram, 64bit OS, ServicePack2

See More: External 56K USB Modem cant stay connected

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November 25, 2011 at 07:33:59
If a newer driver is available, the manufacturer of the modem will have it on their support website: http://www.dmmdownload.com/index.php

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November 25, 2011 at 10:41:23
That lists only internal slot modems, i have an external usb soft modem which i plug into my usb port. That site does not list anything for soft modems.

Here is the model : http://www.futureshop.ca/en-CA/prod...

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November 25, 2011 at 14:20:28
Might poke around in event logs. Might be that your modem and other stuff is drawing too much current. May be that some service is failing.

I doubt a new driver would help.

1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.

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November 25, 2011 at 14:56:39
I have no idea what you just said. I don't suppose you could elaborate ?

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November 25, 2011 at 18:16:25
See help and support for how to use event logs. They are easy to see but contain a lot of info. You need to watch for exact times of failure to get close to correct error.

USB can only supply so much current. This or this and a collection of other devices on the computer may cause it to drop off or some way act odd. Is this on a HUB like a USB hub?

A new driver is unlikely to fix this.

1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.

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November 26, 2011 at 07:49:14
Not really certain what a hub is, its just a port slot on the side of my laptop the device plugs into. There are three identical slots, 2 on one side, one on the other side of which my usb mouse uses as i cant stand the fingerwagging touch pad nuescence.

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