D-Link DSL-2750B rev B1

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D-Link DSL-2750B rev B1
D-Link-DSL-2750B-rev-B1.front.jpg
Homepage
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Wikipedia
WikiDevi.wi-cat.ru
Platform
BrandModelRev
D-Link DSL-2750B B1
FCC ID
none specified
Type
dsl modem, wireless router
Wireless class
N300
CPU1
Broadcom BCM63281
CPU1 Type
MIPS 4350
CPU1 Speed
320 MHz
Flash1 Type
Serial(SPI),CMOS
Flash1 Chip
MXIO MX25L6406E x 1
Flash1 Size
8 MiB8,388,608 B <br />65,536 Kib <br />8,192 KiB <br />64 Mib <br />0.00781 GiB <br />
RAM1 Size
64 MiB67,108,864 B <br />524,288 Kib <br />65,536 KiB <br />512 Mib <br />0.0625 GiB <br />
RAM1 Type
DDR
RAM1 Chip
Nanya NT5TU32M16DG x 1
ETH chip1
Broadcom BCM63281
Switch
Broadcom BCM63281
Ethernet Port Count
4-100MbE-LAN

802dot11 OUI: none specified

Stock bootloader
CFE  1.0.37-106.5
Stock FW OS
Linux
Expansion IF types
USB 2.0
USB ports
1
USB Hub Compatible
Untested
Power
12 VDC, 1 A
Connector type
barrel
Serial Port (UART)
yes, internal, 4-pin header, (115200 8N1)
Categorized as
not categorized
Other
Default IP address
192.168.1.1
Default login user
admin
Default login password
admin
Retail
Availability End of Life
(Est.) release date 28 December 2011
Radio 1
Chip1
Atheros AR9287
Wireless interface OUI
none specified
Antenna Connector Type
None
MIMO status
2x2:2
Wireless Standard
IEEE 802.11b/g/n
802.11n
up to 300 Mbps
802.11g
up to 54 Mbps
802.11b
up to 11 Mbps
WiFi Operating Frequency
2.4 GHz
 CPU1 brandRadio1 chip1 brandRadio1 chip2 brand
D-Link DSL-2750B rev B1BroadcomAtheros
D-Link DSL-2750B rev T1BroadcomBroadcom

For a list of all currently documented Atheros (QCA) chipsets with specifications, see Atheros.
For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.

Overview

Links of Interest

Flashing

Firmware can be flashed via the regular web interface, though if you have firmware v2.03 it sometimes uploads the firmware and then says "The selected file contains an illegal image".

In this case you can use the CFE bootloader: power the router off, hold the recessed reset button pressed with a pointy object, power the modem on and, within the first few seconds, navigate to 192.168.1.1. You should get a plain HTML page with nothing but "Browse" and "Upload firmware" buttons.

Upgrading

The latest version of the D-Link firmware is v2.07.

Version 2.04 is reported to be buggy, resulting in maximum upload speeds of 60kb/sec.

Reverting

JTAG-Serial Info

JTAG

JTAG Pinouts

JTAG Recovery

Serial Port

Serial Pinouts

The internal serial header on this device is J606, which is assumed to have the same pinout as the D-Link DSL-2750B rev T1:

J606
(RxD) (GND) (TxD) (3.3)
Pin4  Pin3  Pin2  Pin1

Pin 1 is the right-hand one when looking at the top of the circuit board from the front of the router (on the underside it has a square pad instead of a round one.)

This is untested.

Serial protocol

It runs at 115200 bits per second, no parity, one stop bit.

Serial Recovery

USB Info

vlan Info

Pictures

Retail Images

Notes

Hardware Modification

See also