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I have a Conexant CX11252-11 Modem.

I only found driver for XP, is there a workaround for Win 7 x64, or perhaps I should throw away this modem?

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up vote 2 down vote accepted

Drivers for this modem are built into the system. Just choose to manually install from the installed drivers, and scroll the list to find CONEXANT and then PCI CX11252-11 Soft Modem. Works perfectly. I tried it just for fun in Windows 10.

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Are you sing this worked in windows 10 too ? – pun Oct 21 '15 at 20:33
@Кир Дарк Wow, I should try this! – Shimmy Oct 23 '15 at 14:08

This is some really old software modem. Conexant doesn't seem to provide 64 bit drivers.

Best would be to buy some new hardware modem (like Rosewill Rnx-56usb which usually have way better driver support (or don't even require any additional as they're primarily an USB-serial port interface with attached serial modem).

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Any workaround/trick before I throw it away? – Shimmy Nov 5 '11 at 19:26
Find some virtualization software able to pass-through PCI cards and do some fancy routing to get the internet connection back? No, there's no use for it if you're missing drivers apart from eBay (if anybody wants that card at all). – Jens Erat Nov 5 '11 at 20:43
I just need it to send/receive faxes. – Shimmy Nov 5 '11 at 20:45
You will not be able to use a soft modem without a driver. Most parts of the modem logic are built into the driver software. There are no 64 bit drivers, so you will not be able to use it. Setting up a hypervisor to have some other OS running which is able to access your PCI modem probably will be "more expensive" than just buying a supported modem. – Jens Erat Nov 5 '11 at 20:54
Agree. Just for anyone still using XP - my modem could be found on the left garbage near my house. – Shimmy Nov 5 '11 at 22:07

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