The Conexant HCF V90 56K Speakerphone PCI Modem is a legacy dial-up modem with voice and speakerphone capabilities. Its driver allows Windows to identify the PCI hardware and communicate with compatible modem software for telephone-line connections and supported voice functions.

Key Features

• Modem recognition: Helps Windows detect the Conexant PCI modem and make its controls available to compatible applications.
• V.90 dial-up support: Enables supported dial-up connections over an analog telephone line. Actual connection speed depends on line quality, service availability, and the remote modem.
• Voice and speakerphone functions: Provides access to supported telephone audio features when used with suitable software and the required audio connections. These functions do not replace a general-purpose sound card.
• Connection configuration: Allows compatible Windows modem settings and diagnostic tools to interact with the device, helping with setup and troubleshooting.

How to Install

1. Confirm the hardware. Open Device Manager and locate the modem, which may appear under Modems or Other devices. Check its Hardware IDs in Properties to ensure the download matches your Conexant HCF V90 56K Speakerphone PCI Modem variant.

1. Check operating-system compatibility. Before downloading, verify that the package explicitly supports your edition of Windows 11, 10, 8, or 7 and its 32-bit or 64-bit architecture. This is older hardware, so support on newer Windows versions should not be assumed. Your computer also needs a compatible PCI slot.

1. Prepare the driver package. Download the matching driver and extract it if supplied as an archive. Review any included instructions, and create a restore point before changing an existing installation.

1. Install the driver. Run the supplied installer if available. Otherwise, right-click the modem in Device Manager, select Update driver, choose Browse my computer for drivers, and point Windows to the extracted folder. Do not bypass driver-signature checks to force an incompatible package.

1. Restart and test. Restart if prompted, then confirm that Device Manager shows the modem without a warning icon. Connect a working analog telephone line and test it with compatible dial-up or voice software.

If Windows cannot find a suitable driver, recheck the hardware ID and package requirements. A download listing alone does not establish compatibility, particularly for Windows 10 and Windows 11.

Common Issues and Fixes

• Install fails or rolls back: The HCF V90 package is legacy and often unsigned or incompatible with 64-bit Windows. Run the installer as administrator in Windows XP/7 compatibility mode, or temporarily disable driver signature enforcement, then install the exact HCF (not HSF) package.
• Modem not detected: Check Device Manager for a PCI modem with a yellow warning. Reseat the card and try another PCI slot; enable PCI/modem devices in BIOS and confirm the modem is not disabled.
• Version conflicts: Remove old Conexant HCF/HSF and generic modem entries first, reboot, then manually update the driver via Device Manager > Browse to the extracted INF. Mixing HCF and HSF drivers can break speakerphone/audio functions.