Driver Details

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

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


  • Version FW_F1-05-48, A02


Operating Systems
  • MS Windows Vista 32-bit
  • MS Windows Vista 64-bit
  • MS Windows XP
  • MS Windows XP x64

Applies to

Conexant D400 External USB 56K Modem;


Release date
18 Oct 2007
Last Updated
03 Nov 2011


Recommended. 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).

Available formats

File Format:Hard-Drive
File Name:R165222.EXE
Download Type:HTTP
File Size: 235KB
Format DescriptionThis 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.
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By downloading, you accept the terms of the Dell Software License Agreement.

Important Information

Install instruction is included in release package.

Fixes & Enhancements

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

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).

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