The DSL-2640U wireless ADSL router is an affordable high-performance ADSL router for home and the small office. With integrated ADSL2/2+ supporting up to 24Mbps download speed, 802.11g wireless LAN, firewall protection, Quality of Service (QoS) and 4-port switch, this router provides all the essentials that a home or small office needs to.

Hello, I've been given that modem and was very interested in repairing it. It is 'bricked' I think. All it does is blink.

Resetting it doesn't do anything. I searched for its firmware everywhere. I mean even D-Link doesn't have the file for that particular hardware version (T1), the others can be found no problem. I opened the thing. Casing: Model: DSL-2640U FCC ID: KA2SL2640BT1 P/N: ISL2649UEME3.T1E H/W: T1 F/W: ME_1.00 Inside box, on PCB: 3990/S1/V1.00/D-Link/Gaw5.6 T02A-4(dying gasp)Russia/Gaw 5.6T02-4-DL-R1B010-ME.EN PCB: Chips: - BROADCOM: -BROADCOM BCM5325EKQMG n RG1030 P11 n 1000410 1A: Six port managed 10/100 ROBOswitch. -BROADCOM BCM6333KFBG n HG1041 P12 n 101123 01: SINGLE CHIP ADSL TO ETHERNET CPE ROUTER -BROADCOM BCM4312KF86 n TK1034 P11 n 993752 82 - ESMT: -M12L128168A- 7T n AZT1E070G 1028 - MNC: -MNC H2001DG n 1040 I learned that Dying Gasp is a signal the router sends to the ISP when there is a current outage to tell him 'The connection will be dropped, it's not because there's a bad link.

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It's because the power is down'. It does that with some juice stored in capacitors. And it sends three messages, I think.

I discovered something interesting too. The device has a Serial Port to talk to me Looking further, it seems it's a 3.3 volts, and it needs to be level shifted.

Anyway, but for now. I wanted to have the firmware. So I downloaded many, and by accident, one had a filename in the form of gaw5.6t02-4-dl-r1b030 So I searched for 'gaw5.6t02-4-dl-r1b010' and luckily, I found The file can be downloaded here: D-Link has messy web-sites, not accessible I do not know why.

So now, I have to set up something in order to communicate with the box. The web interface doesn't work, obviously. And I think the firmware image has been corrupted. Maybe it won't even be able to talk to me, and I'll have to dump something in the nvram and whatnot. Concerning the interface with the PC, etc. I also discovered a great program, it's called Flashrom.

It's from programming chips (Firmware hubs, etc.). Update 0x1: I tried to communicate with the router with my PICkit2 ICSP ports. Microman was kind enough to speed the process with the pinout and raising morale. The thing is that the Broadcom chip communicates at a staggering baudrate (115200 baud). When I use the PICKit2 software, the maximum is 34800 baud.

Radioshack Gigaware USB-to-Serial Adapter Windows 7 Driver. To install the driver, open up Windows Device Manager and find the USB-to-serial adapter. Right click and select Update Driver Software. Choose “Browse my computer for driver software” and navigate to the folder where you extracted the files. As Mike pointed out in the comments, the guts of the Gigaware cable are based on the Prolific PL2303 chip. It is a tool that is not just a standard application but it is defined as above standard. If you want an integration of the USB and also the serial driver then this the tool. Gigaware USB to Serial Driver is licensed as freeware for PC or laptop with Windows 32 bit and 64 bit operating system without restrictions. Gigaware drivers for windows 10.

So you see the hic. The good thing is that the voltage can be chosen to 3.3 volts. I'm thinking to use some PIC (the 16F887 which has an enhanced USART). I have seen that it has the autodetect feature for baudrate, and I have seen the 115200 mentioned in its datasheet. So Router --> PIC --> PICKit2 ICSP --> PC over USB. Either this, or using a level converter chip to communicate directly with the computer's serial port.