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Cisco Consumer Business Group 

121 Theory 

Irvine, CA 92617 USA
www.linksys.com
Linksys, Cisco and the Cisco Logo are registered 

trademarks or trademarks of Cisco Systems, Inc. 

and/or its affiliates in the U.S. and certain other 

countries. Copyright © 2008 Cisco Systems, Inc. 

All rights reserved. Other brands and product 

names are trademarks or registered trademarks 

of their respective holders.

The  maximum  performance  for  wireless  is  derived  from  IEEE  Standard  802.11  specifications.  Actual  performance  can  vary,  including  lower  wireless 

network capacity, data throughput rate, range and coverage. Performance depends on many factors, conditions and variables, including distance from 

the access point, volume of network traffic, building materials and construction, operating system used, mix of wireless products used, interference and 

other adverse conditions.

Specifications are subject to change without notice. 

8121910NC-JL

Model:

 WRT400N

Specifications

Model 

WRT400N

Standards 

Draft 802.11n, 802.11a, 802.11g, 

 

802.11b, 802.3, 802.3u

Ports 

Power, Ethernet, Internet

Button 

Reset, Wi-Fi Protected Setup

LEDs 

Power, Internet, Wireless,  

 

Wi-Fi Protected Setup, 

 

Ethernet (1-4)

Number of Antennas 

4 Total, 2 Internal Antennas per  

 

Each 2.4 GHz & 5 GHz Radio Band

Modulations 

802.11b: CCK, QPSK, BPSK  

 

802.11g: OFDM 

 

802.11a: OFDM 

 

Wireless-N: BPSK, QPSK, 16-QAM, 

 

64-QAM

Streams 

Two Spatial Streams for Transmitting and Receiving in 2.4 GHz Radio Band 

 

Two Spatial Streams for Transmitting and Receiving in 5 GHz Radio Band

Receive Sensitivity 

2.4GHz 

 

11Mbps: -88 dBm @ Typical 

 

54Mbps: -72 dBm @ Typical 

 

MCS15 (20MHz): -68 dBm @ Typical 

 

MCS15 (40MHz): -65 dBm @ Typical 

 

5GHz 

 

54Mbps: -72 dBm @ Typical 

 

MCS15 (20MHz): -68 dBm @ Typical 

 

MCS15 (40MHz): -65 dBm @ Typical

Antenna Gain in dBi 

2.4GHz 

 

RIFA 1 <= 1.3 dBi (Typical) 

 

RIFA 2 <= 3.5 dBi (Typical) 

 

5 GHz 

 

RIFA 1 <= 3.85 dBi (Typical) 

 

RIFA 2 <= 3.04 dBi (Typical)

UPnP  

Supported

Security Features 

WEP, WPA, WPA2

WEP Key Bits 

Up to 128-Bit Encryption

Environmental

Dimensions 

8.07" x 1.38" x 6.30" (205 x 35 x 160 mm)

Weight 

1.01 lb (460 g)

Power 

12V, 1.5A

Certifications 

FCC, IC, Wi-Fi a/b/g/draft-n

Operating Temp. 

32 to 104°F (0 to 40°C)

Storage Temp. 

-4 to 158°F (-20 to 70°C)

Operating Humidity 

10 to 85%, Noncondensing

Storage Humidity 

5 to 90% Noncondensing

Package Contents

Simultaneous Dual-Band Wireless-N Router

• 

Setup software and User Guide on CD-ROM

• 

Quick Installation Guide

• 

Ethernet Network Cable

• 

Power Adapter

• 

Minimum Requirements

Internet Explorer 6.0, Safari 3.1 or Firefox 1.0 or Higher for Browser-Based Configuration

• 

CD-ROM Drive

• 

Wired or Wireless* Network Adapter with TCP/IP Protocol

• 

EasyLink Advisor Software and Setup Wizard Require Up-to-Date Windows XP, Vista, or Vista  

• 

64-Bit Edition
Setup Wizard Also Runs Under Mac OS X 10.4 or Higher

• 
* For optimum performance, we recommend Linksys Dual-Band Wireless-N Adapters.

Features

Expanded wireless coverage—far 

• 

more range than 802.11g products
Complies with the draft IEEE 

• 

802.11n standard
Blazing fast wireless speeds for 

• 

high bandwidth applications such 

as video streaming or file sharing
All ports support auto-crossover 

• 

(MDI/MDI-X)—no need for 

crossover cables
MIMO technology uses multiple 

• 

radios to create a robust signal 

that travels farther and faster, with 

reduced dead spots
Performance investment 

• 

protection: Compatibility 

with Wireless-A (802.11a), 

Wireless-B (802.11b), and 

Wireless-G (802.11g) standards
Supports up to 128-bit encryption 

• 

security

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