ASUS DSL-N55U


 * Product page (Annex A) •  Product page (Annex B)


 * See also: ASUS DSL-N55U C1 • Product page (Ver. C1)



This device has two versions (same hardware components):
 * Annex A (A1 revision), Annex B (B1 revision)

The device has:
 * - Two processors, one for router part and the other for ADSL modem part;
 * - 8 MB flash for router part and 1 MB flash for modem part;
 * - 128 MB ram for router part and 2 MB ram for modem part;
 * - RP-SMA connectors.
 * - Two USB 2.0 ports, 1 Ampere max output per port.
 * - Capability to use a LAN port as WAN port.

Reviews

 * Review on ThinkBroadband
 * "RT4070AW-D61(RoHS)", "REV:3.0", and "Annex A"
 * is silkscreened on the board.
 * Flash: Macronix MX29LV640EB (8MB)
 * RAM: Winbond W9816G6IH-6 (2MB)

Spec. pages

 * On SpeedGuide.net
 * On direct.it (now a dead link...) Notes specs as
 * Ralink RT3662 (WiSoC 5GHz 2x3:2)
 * Ralink RT3092 (RFIC PCIe 2.4GHz 2x2:2)
 * TrendChip TC3162LEM (SoC ADSL)
 * Realtek RTL8367R (Gigabit Switch)

Forum threads

 * ASUS DSL-N55U First impressions on the NotebookReview forums
 * Asus dsl-n55u any good? on the whirlpool.net.au forums
 * Large post on the hwupgrade.it forums

Firmware
The stock firmware is AsusWRT, based on Linux 2.6.22.19.

The source code is available on the device's support page:
 * Annex A, Annex B

Thanks to Hardware Upgrade (italian forum thread)

Web UI hidden pages
- LAN Switch control: http://192.168.1.1/Advanced_SwitchCtrl_Content.asp

- Operation Mode: http://192.168.1.1/Advanced_OperationMode_Content.asp
 * Doens't work

- Command Console: http://192.168.1.1/Main_AdmStatus_Content.asp
 * Since firmware 3.0.0.4.374_4422 it does not work anymore.

Hidden features
Available via telnet console. Not sure if they are all working properly.

- Downstream output power value, relative capacity occupation and carrier load:

- SNR table:

- Enhanced sudden noise protection:

Admitted values:
 * 0 (disabled) [Default]
 * 1 (enabled)

- Dynamic line adjustment (DLA):

Admitted values:
 * 0 (disabled)
 * 1 (enabled) [Default]

- ADSL RX auto gain control (AGC):

Admitted values:
 * Default [Default]
 * Stable
 * High Performance

- G.INP (impulse noise protection):

Admitted values:
 * 0 (disabled) [Default]
 * 1 (enabled)

For futher informations about this features visit ASUS DSL Settings FAQ

Serial Port
This device is equipped with two serial ports. The good one is near the leds and the jtag pins. The pinout is:

___________________      Connection parameters: | VCC GND TX RX  |       57600 8 N 1 |_____|    |_____|

Custom firmware
There is a project of a custom firmware (AsusWRT-Bender) based on AsusWRT-Merlin custom firmware:
 * https://github.com/matteocrippa/dsl-n55u-bender - Original development by Matteo Crippa, now discontinued;
 * https://github.com/IceMans/dsl-n55u-bender - Development by IceMans, now discontinued.

Images
Asus Images