Conexant D400,External USB 56K Modem, v.FW_F1-05-48, A02

Conexant Europa D400 External USB 56K Modem Firmware ver:F10548

Fixes & Enhancements

1) Fix for DTMF level problem
2) Improved Vista reinstall issue fix


Version FW_F1-05-48, A02



Release date

18 Oct 2007

Last Updated

03 Nov 2011


Available formats

File Format:Hard-Drive
File Name:R165222.EXE
Download Type:HTTP
File Size: 235 KB
Format Description:This file contains a compressed (or zipped) set of files. Download the file to a folder on your hard drive, and then run (double-click) it to unzip the set of files. Follow the instructions to complete the installation.
To ensure the integrity of your download, please verify the checksum value.
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By downloading, you accept the terms of the Dell Software License Agreement.

Supported Operating Systems
Windows Vista, 32-bit
Windows Vista, 64-bit
Windows XP
Windows XP, 64-bit
Applies to
Conexant D400 External USB 56K Modem
Installation instructions
Custom Instructions for R165222.EXE:

NVRAM Patch:
1. Configure the communications application program for a DTE rate of between 9600 bps and 115200 bps and hardware
flow control enabled (RTS/CTS flow control).
2. Initiate the download process using the AT** command. The ¡§Download initiated ..¡¨ message appears upon issuing the
AT** command.
3. Send the latest USB loader (USBLOAXX.S37 file) in ASCII or text mode. Once the modem is ready to download the
patch file it will out put the message ¡§Upload NV_ram Data ..¡¨
4. Send the latest controller patch file (F105XX.ptc) in ASCII or text mode. Once the patch is loaded, the modem will
respond with ¡§Upload successfully completed¡¨

Patch Loading Verification:
To verify the modem has successfully loaded the patch, send the command AT-PV. The modem should return the
patch version which consists of 3 bytes (example: F10548).
Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

This driver has been tested by both the independent software vendor (ISV) and Dell on the operating systems, graphics cards, and application supported by your device to ensure maximum compatibility and performance. Details

Dell recommends applying this update during your next scheduled update cycle. The update contains feature enhancements or changes that will help keep your system software current and compatible with other system modules (firmware, BIOS, drivers and software).