D-Link DSL-2750B rev B1

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bgn (N300)
D-Link DSL-2750B rev B1
D-Link-DSL-2750B-rev-B1.front.jpg
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3rd Party Firmware
dd-wrt
Not Supported
OpenWrt
Not Supported
Tomato any flavor
Status Unknown
Platform
BrandModelRev
D-Link DSL-2750B B1
FCC ID
Board ID
2976380401
Type
dsl modem, wireless router
CPU1
Broadcom BCM63281
CPU1 Type
MIPS BMIPS4350
CPU1 Speed
320 MHz
Flash1 Chip
Macronix 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 /> (Serial(SPI),CMOS)
RAM1 Size
64 MiB67,108,864 B <br />524,288 Kib <br />65,536 KiB <br />512 Mib <br />0.0625 GiB <br /> (DDR)
RAM1 Chip
Nanya NT5TU32M16DG x 1
ETH chip1
Broadcom BCM63281
Switch
Broadcom BCM63281
Ethernet Port Count
4-100MbE-LAN
Wired Standard
IEEE 802.3i/3u

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)
Other

Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1304 additional devices
of which 31 are D-Link devices
Default login user: admin
Default login password: admin
admin:admin credentials used by 1330 additional devices
of which 76 are D-Link devices

Manuf/OEM/ODM
Delta Networks AW4339U
Retail
Availability End of Life
FCC approval date 27 July 2011
(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
 FCC ID
D-Link DSL-2740B rev F1KA2SL2740BF1
 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.

For a list of all currently documented D-Link device with specifications, see D-Link.

300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.) = N300 class


Overview

"2976380401" and "A610A234006R_R6" is silkscreened on the board.

This device appears to use Broadcom BCM63281.

Additional models of.. D-Link

  • DSL-2750B (Annex A, USB, 'dying gasp' feature)
  • DSL-2740B (Annex A, no USB, without 'dying gasp')
  • DSL-2740U (Annex A, no USB, without 'dying gasp')
  • DSL-2741B (Annex B, USB, 'dying gasp' feature)
  • DSL-2741U (Annex B, USB, 'dying gasp' feature)

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.

JTAG-Serial Info

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.

Pictures

Retail Images
User Images

See also

D-Link DSL-2750U
Broadcom BCM63281/BCM43225
Broadcom BCM63281/BCM43225
Broadcom BCM63281/Atheros AR9287
Broadcom BCM63281/Atheros AR9287
D-Link DSL-2741B rev C2OpenWrt
Broadcom BCM6358SR/BCM4321/RTL8306G
Flash: Macronix MX29LV640ETTI-70G (8MB)
RAM: Mira P3S56D40ETP (32MB)
CPU: Broadcom BMIPS3300 (333MHz) ADSL2+
Flash/RAM: 8/64MB, SW: 4x FE
WLAN: Broadcom BCM43217