Linksys WRT120N

bgn (N150)
Wireless-N Home Router
Support	Support page
Wikipedia	Linksys routers
InfoDepot Wiki	Linksys WRT120N v1.0
3rd Party Firmware
dd-wrt	Incompatible
OpenWrt	Incompatible
Tomato any flavor	Incompatible
Platform
Brand • Model • Rev	Linksys WRT120N v1
Serial number prefix	JUT0, JUT00
FCC ID	Q87-WRT120N
IC ID	3839A-WRT120N
Type	wireless router
CPU1	Atheros AR7240
CPU1 Type	MIPS 24Kc
CPU1 Speed	400 MHz
Flash1 Chip	Macronix MX25L1606E
Flash1 Size	2 MiB2,097,152 B <br />16,384 Kib <br />2,048 KiB <br />16 Mib <br />0.00195 GiB <br />
RAM1 Size	32 MiB33,554,432 B <br />262,144 Kib <br />32,768 KiB <br />256 Mib <br />0.0313 GiB <br />
RAM1 Chip	Winbond W9425G6JH-5
ETH chip1	Atheros AR7240
Switch	Atheros AR7240
Ethernet Port Count	1-100MbE-WAN 4-100MbE-LAN
Wired Standard	IEEE 802.3/3u
802dot11 OUI: 00:25:9C (8 E, 15 W), 68:7F:74 (13 E, 16 W), 98:FC:11 (7 E, 8 W) Ethernet OUI: 00:25:9C (8 E, 15 W), 68:7F:74 (13 E, 16 W), 98:FC:11 (7 E, 8 W)
Stock FW OS	SuperTask!
Expansion IF types	none specified
Power	12 VDC, 1 A
Connector type	barrel
Other
Default SSID: linksys (53 addl. devices) Default IP address: 192.168.1.1 the IP 192.168.1.1 is used by 1324 additional devices of which 155 are Linksys devices Default login user: blank Default login password: admin blank:admin credentials used by 278 additional devices of which 135 are Linksys devices
Manuf/OEM/ODM	Arcadyan
Retail
FCC approval date	29 April 2009
UPC	745883587858 (UPC DB, On eBay)
ASIN	B0028N6VNW
Country of manuf	China
Physical
LEDs/Color	blue
Dimensions	7.99" x 1.38" x 6.3" (203mm x 35mm x 160mm)
Radio 1
Chip1	Atheros AR9285
Wireless interface OUI	00:25:9C,68:7F:74,98:FC:11
Antenna Connector Type	none specified
MIMO status	1x1:1
Wireless Standard	IEEE 802.11b/g/n
802.11n	up to 150 Mbps
802.11g	up to 54 Mbps
802.11b	up to 11 Mbps
WiFi Operating Frequency	2.4 GHz

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

For a list of all currently documented Linksys device with specifications, see Linksys.

• 150 Mbps - 1SS 2.4GHz 802.11n (40MHz chan.) = N150 class

Overview

"P/N: 141700520014J R0A2" is silkscreened on the board in the FCC photos.

The serial number for this device may be prefixed with JUT0 / JUT00.

Links of Interest

• Linksys WRT120N Reviewed by SmallNetBuilder
• Linksys WRT120N supported ? on the DD-WRT forums

(but lists processor and wireless chip part numbers)

• Listed on the 'Linksys routers' page on Wikipedia

Reverse engineering

Craig's posts on /dev/ttyS0

• Reversing the WRT120N’s Firmware Obfuscation (2014-02-02)
• Re-enabling JTAG and Debugging the WRT120N (2014-02-05)
  • notes the OS used as SuperTask!
• Cracking Linksys “Encryption” (2014-02-12)
• WRT120N fprintf Stack Overflow (2014-02-19)

JTAG-Serial Info

JTAG

JTAG Pinouts

JP8 - 14 pin header (2 rows of 7 pins @ .1" spacing)

Serial

Serial Pinouts

JP3 - 10 pin header (2 rows of 5 pins @ .1" spacing)

Pictures

FCCID Q87-WRT120N

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