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.

Supported Versions

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

Hardware Highlights

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

→ downloads
→ Install OpenWrt

Flash Layout

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

OEM easy installation

Get the firmware openwrt-DSL2650U-squashfs-cfe.bin
Unplug the power cord
Press the reset button, don't release it yet!
Plug the power cord
Wait 10 seconds
Release the reset button
Browse to http://192.168.1.1
Select openwrt-DSL2650U-squashfs-cfe.bin file
Upgrade the image
Wait for it to reboot
Telnet to 192.168.1.1 and set a root password, or browse to http://192.168.1.1 if LuCI is installed.

OEM installation using the TFTP method

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

Upgrading OpenWrt

→ generic.sysupgrade

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

Browse to http://192.168.1.1/cgi-bin/luci/mini/system/upgrade/ LuCI Upgrade URL
Upload image file for sysupgrade to LuCI
Wait for reboot

Terminal Upgrade Process

Login as root via SSH on 192.168.1.1
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

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

Hardware

Info

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
JTAG	?

Photos

Model Number

Front & Back (rev D2):

Opening the case

→ Warranty

To remove the cover do a/b/c

Photo of PCB

CPU / Wi-Fi / Switch

Serial

→ 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

Hardware mods

as a beginner, you really should inform yourself about soldering in general and then obtain some practical experience!

Main PCB Mods

Adding WAN port

Adding a second Wi-Fi antenna Mod

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.

Adding LED Mod

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

Adding second USB port Mod

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

Adding WAN port Mod

The board can be arranged WAN port (P4).

Needed parts:

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

Adding WPS button Mod

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

Original Firmware Info

The original GPL sourcecode v1.00 can be downloaded Here. It consist on a Linux 2.6.8.1 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

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