D-Link DSL-2740B/DSL-2741B

The D-Link DSL-274xB is a four port wireless router with integrated ADSL2+ modem. The x differentiates the ADSL Annex supported; 0 is Annex A and 1 is Annex B.

:!: As with all BCM63XX devices, there is no support for the integrated DSL modem. :!:

Versions

Version/Model OpenWrt Version Supported Model Specific Notes
C2/C3 trunk -
E n/a external switches are not supported yet
F1 trunk the switch is currently unconfigurable

Installation

OEM easy installation

These devices can be easily flashed through the generic CFE recovery webserver:

  • Press and hold the reset button
  • Power on the device
  • Wait until the power LED turns solid red (after about 30 seconds)
  • Upload the image

Upgrading OpenWrt

Specific Configuration

Switch Ports (for VLANs)

Numbers 0-3 are Ports 1-4 as labelled on the unit, in reverse order (so internal port 0 is external 3, 1 is 2, etc).

Failsafe mode

Hardware

Info

Revision C2,C3 Revision E1 Revision F1
Architecture: MIPS
Vendor: Broadcom
Bootloader: CFE
System-On-Chip: BCM6358 BCM6328
CPU/Speed 4Kc 300 Mhz 4Kc 320 Mhz
Flash-Chip: varies
Flash size: 4096 KiB 8192 KiB
RAM: 32 MiB 64 MiB
Wireless: Broadcom BCM4321 802.11bgn Atheros AR9287 802.11bgn
Ethernet: Broadcom BCM5325e Realtek RTL8306 (integrated in SoC)
Internet: ADSL2+ (unsupported)
USB: No
Serial: Yes, Pin Header
JTAG: No

Opening the case

Note: This will void your warranty!

For Revision C2 (and probably C3):

  • Remove the screws under all four rubber feet
  • Lift the top case (it should not provide much resistance)

For Revision F1

This model is tricky to open as it has a total of seven plastic clips holding the top. You might need brute force, and there are chances you will damage your case.

  • Remove the screws under all four rubber feet
  • For the front clips: using two flat head screw drivers push bottom "grill" out until you can lift the top slightly
  • For the front side clips: using a flat head screw driver push the bottom out until it clicks (slide it in from the corner, then work yourself to where the clip is)
  • For the back side clips: these should be easy now with some wiggling

Serial

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

The Pinout is (with the Ethernet ports on top):

GND RX TX 3.3V

Debricking

Reverting to original Firmware

For reverting to the original firmware, obtain the firmware from D-Link and flash it using the OEM easy installation.

Tags

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toh/d-link/dsl-2740b.txt · Last modified: 2012/09/18 12:31 by danitool