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The Belkin F5D7630 is a router with integrated adsl / adsl 2+ based on the Belkin F5D7230-4 router. There is interest in having an open firmware running on this platform. As OpenWRT is the starting point for most new Broadcom customers, and as OpenWRT's FAQ links to this page, hopefully, information can be provided here to those who have purchased Belkin's as well as those wanting to contribute to opening this platform.

This router is also sold in Europe in 2006 and 2007 under the brand Micradigital, with the revision F5D7630ec4. See

These devices have 2MB flash and 16MB RAM.

Similar Models

The same electronic is also sold rebranded and the following models are firmware compatible.

  1. SMC Barricade SMC7904WBRA.
  2. Micradigital F5D7630.
  3. Philips SNA 6500-005.


Router Specifications

IP Sharing Method NAT (Network Address Translation).

  • Firewall NAT, SPI.
  • Clients Supported 253 Total.
  • Wireless Clients Supported 64 Total.
  • DHCP Server Supported, User Defeatable.
  • User Interface HTTP/Through Web Browser.
  • RJ11 : 1 WAN (for connection to the DSL modem).
  • RJ45 : Ports 4 LAN (For connection to local clients) auto-uplinking.
  • Wired Network Standards WAN: 802.3 10Base-T. LAN: 802.3u 10/100Base-T.
  • Protocols Supported : TCP/IP, UDP, CSMA/DCD, DHCP, AppleTalk®
  • ISP Protocols Supported :
  • Static
  • Dynamic
  • PPPoE
  • PPPoA Multiple Protocol over ATM
  • Power Consumption 12V/1A

Modem Specifications

  • Standards
  • ITU G.dmt (Downstream 8 mbps, Upstream 640kbps).
  • ITU G.Lite (Downstream 1.5 mbps, Upstream 512kbps).
  • ITU G.Handshake.
  • ITU T.413 issue 2 - ADSL full rate.
  • Annex A (Annex B Available).

Radio Specifications

Wireless Standard 802.11g Radio technology Direct Sequence Spread Spectrum (DSSS) Encryption

  • 64- or 128-bit WEP (Wired Equivalent Privacy)
  • WPA (WiFi Protected Access) Data Encryption with TKIP and AES
  • Media Access Protocol CSMA/CA (Collision Avoidance) with ACK
  • Frequency Band ISM Band 2400-2483.5MHz
  • Antenna Type Dual dipole antenna Output Power +13dBm-20dBm (50mW) (max.)
  • Modulation Type QPSK, BPSK, CCK
  • RF Channels 1-11 Channels (USA, Mexico, Canada), 1-13 (UK)
  • Data Rates Supported 1, 2, 5.5, 6, 9, 11, 12, 24, 36, 48 & 54 Mbps
  • Max Operating Range (ft/Meters)
  • Outdoors 1800 ft (550m)
  • Indoors 300 ft (90m)
  • Reciever Sensitivity -80 dBm
  • LED Indicators 8 LEDs Power, SYN, Data, WAN, LAN (1,2,34)
  • Operating System
  • Support Windows® 95, 98, 98SE, Me, 2000, NT, XP, Linux, Mac OS®

Environmental Specifications

Temperature Humidity
Operating (-10 to 50 degress C) 10% - 95% (non-condensing)
Storage (-40 to 70 degrees C) 10% - 95% (non-condensing)

Package Contents

  • 802.11g Wireless ADSL Modem Router
  • Power Supply
  • User Manual
  • Quick Installation Guide
  • RJ45 Networking Cable
  • RJ11 Phone cable
  • ADSL Filter
  • CD

Internal Layout

A photo of the internals of a F5D7630-4A can be found here.

Installation of OpenWRT

NOTE: Use the tftp installation method. Web interface upload is problematic since Belkin use a firmware header like linksys, but OpenWRT doesn't provide firmware images for belkin. The standard openwrt-brcm-2.4-.trx images get rejected by the device. Belkin's customisations to the firmware add the ability to specify nvram settings as a footer section to the firmware. It should be possible to create a Belkin specific firmware that can uploaded via the Belkin web interface by following a method similar to that in this paper

Credit to:

The OpenWRT community for making OpenWRT.

Belkin for making a nice, cheap router.

There are a number of public forums and web sites where the installation of open source firmware for the Belkin F5D7630 is being discussed and published.


  1. :: Expansys forum dedicated to the F5D7630
  2. :: OpenWRT "General Discussion"

5.,10837191~mode=flat~days=9999 :: Broad Band Reports "Belkin Firmware Image Header"

Development Pages

  1. :: Interresting page with technical data and comprehensive links.

Serial Pages

Hardware Pages

  1. :: Broadcom Corporation – BM94712 – 802.11b/54g™ Integrated Wireless AP/Router Reference Design
  2. :: Broadcom Intros New Integrated 11g Processor
  3. :: Moi Meme - LinksysWRT54G

Software Pages

Official Firmware

Other Firmware Pages (that may yield useful firmware)

Other Pages (that may yield useful information)

  1. :: Linksys WRT Information (similar/same platform as Belkin)


A good deal of documentation has been published in the public domain, regarding the Belkin F5D7230-4. Most of this has been in the forums (above), but some has been collated in the documents below.

If you have done something that you think might help someone else, write it up and post a link here!

Understanding the Belkin extended firmware for OpenWRT development

    In this paper the Belkin F5D7630 is explored for
    its availability as a fully integrated wireless
    firewall router and VPN end-point. This work must
    be done in order to achieve a best-practice
    security solution in the Small Office / Home Office
    (SOHO) price-point. Where, while almost all of the
    casual risks are equivalent to those experienced
    by large enterprise, no mitigation technologies
    are available at an appropriate cost. By collating
    a mass of publicly available information, the paper
    concludes by providing a root shell into the
    device, and a number of Linux-based reports on the
    hardware make-up of the router. It is hoped that
    this information can be used to adapt the OpenWRT
    embedded Linux distribution, for this Belkin router.

Document URL;

Attaining console access via the native Belkin serial port for OpenWRT development

    By collating a mass of publicly available
    information, and experimenting with a single unit,
    the paper concludes by providing a physical
    console into the device, providing local root user
    level access, and a schematic diagram for a solder-
    less project that will allow individuals to try
    this experiment for themselves. It is hoped that
    this information can be used to debug open source
    firmware and to then adapt the OpenWRT, and
    Sveasoft, embedded Linux distributions for this
    Belkin router.

Document URL;

Compiling and Installing the GPL Broadcom Reference Firmware

    Belkin published the Broadcom reference firmware;
    a small Linux distribution, designed to act as a
    proof-of-concept and development environment for
    the Belkin engineers. To minimize the amount of
    experimentation required to adapt the OpenWRT and
    Sveasoft firmware for use on the Belkin, the
    published Broadcom reference firmware was compiled
    to see if it was functional, and able to provide
    driver and configuration information for the open
    source distributions.
    Furthermore, this process was developed rapidly
    due to the excellent work performed by Rick

Document URL;


oldwiki/openwrtdocs/hardware/belkin/f5d7630.txt · Last modified: 2009/04/23 12:38 (external edit)