Conexant doesn't make modems, they make chipsets and sell them to modem manufacturers/motherboard makers.
Don't you think it would be important to include something besides a chipset number?
--> Modem Help Guide <--
<--- Please read!
It might aid someone trying to help you if your post contained some details like:
Is this device integrated on the motherboard or a separate add-on PCI or ISA card, an internal notebook mini-card, or an external USB, Serial Port, or PCMCIA connected modem? Modems DO NOT have IDE interfaces. IDE ports are reserved for hard and optical drives and some tape backup machines.
Did it come pre-installed in your computer at the time of purchase?
Used in a laptop or desktop computer?
Computer/motherboard brand and model?
Did it come from the factory with Windows XP installed?
With only the vague info you provided, all I can suggest is to visit our Advanced Driver Search Wizard
to see if anyone has uploaded a driver for any modem model containing this chipset. It might work.... or if you care to provide some details of your hardware/computer/motherboard, we will attempt to find this driver.