D-Link DSL-2650U

This device is NOT RECOMMENDED for future use with OpenWrt due to low flash/ram.
DO NOT BUY DEVICES WITH 4MB FLASH / 32MB RAM if you intend to flash an up-to-date and secure OpenWrt version onto it! See 4/32 warning for details.

1) This device does not have sufficient resources (flash and/or RAM) to provide secure and reliable operation.
This means that even setting a password or changing simple network settings might not be possible any more, rendering the device effectively useless. See OpenWrt on 4/32 devices what you can do now.

2) OpenWrt support for this device has ended in 2022.
19.07.10 was the last official build for 4/32 devices.

DSL will not work at all on devices with BCM63xx DSL chipset (due to unavailability of FLOSS driver for Broadcom chips). Consider this when choosing a device to buy, or when deciding to flash OpenWrt on your device because it is listed as supported.
See Broadcom DSL, Unsupported: DSL modem and Broadcom BCM63xx for details.

Version/Model H/W Rev Launch Date S/N OpenWrt Version Supported Model Specific Notes
DSL-2650U/BRU/D D1 08-Apr-2009 - 10.03 (patched) 1 x USB
DSL-2650U/BRU/D2 D2 14-May-2010 - 10.03 (patched) 2 x USB
MTS DSL-2650U ?(D1) 05-Apr-2010 - ? 1 x USB for 3G modem 1)
DSL-2650BU B1 ? - - 2 x USB, WPS
DSL-2650U (Mod) 2) All - - 2 x USB, WPS, 1 x WAN, 2 x ExtAnt
SoC CPU speed Ram Flash Network USB Serial JTag
Broadcom 6358 300MHz 32MiB 8MiB 4 x 100M Yes Yes Yes?
  • 1 RJ-11 ADSL port
  • Built-in 802.11g WLAN


Please check out the article flash.layout. It contains an example and a couple of explanations.

  • Unplug the power cord
  • Press the reset button, don't release it yet!
  • Plug the power cord
  • Wait 10 seconds
  • Release the reset button
  • Select openwrt-DSL2650U-squashfs-cfe.bin file
  • Upgrade the image
  • Wait for it to reboot
  • Telnet to and set a root password, or browse to if LuCI is installed.

If you want to upgrade using TFTP you follow these steps (as an alternative to the above install process.


If you have already installed OpenWrt and like to reflash for e.g. upgrading to a new OpenWrt version you can upgrade using the mtd command line tool. It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

LuCI Web Upgrade Process

Terminal Upgrade Process

  • Login as root via SSH on
  • Use the following commands to upgrade.
cd /tmp/
wget http://downloads.openwrt.org/snapshots/trunk/brcm63xx/openwrt-DSL2650U-squashfs-cfe.bin
sysupgrade /tmp/openwrt-DSL2650U-squashfs-cfe.bin
  • If sysupgrade does not support this router, use the following commands.
cd /tmp/
wget http://downloads.openwrt.org/snapshots/trunk/brcm63xx/openwrt-DSL2650U-squashfs-cfe.bin
mtd write /tmp/openwrt-DSL2650U-squashfs-cfe.bin && reboot

Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

Architecture MIPS
Vendor Broadcom
bootloader cfe
Board Id 96358VW2
System-On-Chip BCM6358
CPU/Speed BMIPS4350 V1.0 / 300 Mhz BMIPS Dual Core
Flash-Chip AM29LV320MB
Flash size 8 MiB
RAM-Chip K4H561638H-UCCC / DDR-400
RAM size 32 MiB
Wireless Broadcom 4318 (mini-pci)
Wireless standard 802.11b/g
Antenna 2x
Ethernet Broadcom BCM5325 w/ vlan support swconfig
Internet ADSL2+
ADSL 5V Line Driver AnnexA LAL2020
USB 2×2.0H
Serial Yes

Model Number

Front & Back (rev D2):
dsl-2650u_bru_d_side_l.jpeg dsl-2650u_bru_d_back.jpg

Note: This will void your warranty!

  • To remove the cover do a/b/c

Photo of PCB

CPU / Wi-Fi / Switch

port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port (JP1) of this specific device:

  [x] : TX 
  [x] : GND 
  [x] : VCC 3.3V 
  [ ] 
  [x] : RX
  • Speed - 115200
  • Data bits - 8
  • Stop bits - 1
  • Parity - None
  • Flow control - XON/XOFF
  1. as a beginner, you really should inform yourself about soldering in general and then obtain some practical experience!

Main PCB Mods

Adding WAN port

The board cut section the track going to the built-in antenna (coil on the board), and part of a track udischy in Wi-Fi module and add a screen between the connector / cable external antenna.

D2 - WPS
D4 - second USB port
D10 - WAN port on CPU

Need to unsolder not getting the circuit elements, such as, USB port, LED (D4), circuitry for power supply. This action turns the device D1 ⇒ D2

The board can be arranged WAN port (P4).

Needed parts:

  1. P4 Ethernet port RJ45 1×1 connector without shield
  2. T2 Single 10/100 Base-tx Lan Magnetic: 12ps6121c.pdf
  3. R196, R197, R201, R202 75 Ohm 0805 size smd resistor
  4. С136 Electrolytic capacitor (I used 220uF*16V)
  5. U14 Unknown IC (just short circuit pads 3 & 5)

The board involves the installation of a button (SW3) and LED (D2), it is necessary to check.

The original GPL sourcecode v1.00 can be downloaded Here. It consist on a Linux kernel with binary Broadcom tools&drivers and sourcecode of the kernel and the rest of tools.

The lastest original firmware (v1.20 at 27.06.11) can be found Here

3G modem can used as a WAN-interface
Custom modification of the hardware platform, the device is not available commercially
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  • Last modified: 2021/01/01 18:37
  • by danitool