DSL-N66U High Performance Wireless ADSL Gateway

Asus DSL-N66U is high performance DSL modem gateway with twin processors for wired and wireless connections


Typically novice users in wifi networking do not want to be complicated in building their home network to share their broadband internet with all of the computers and other mobile devices within the household. The easiest way to build the wifi network is to use the all-in-one modem gateway – the wireless router with built-in modem. The good thing with modem gateway is that you just need a single compact device for all you need to build the network that generally include modem and a wireless router, helps you reducing the clutter devices and configuring only one device.

For Cable services you may consider Motorola SBG6580 wireless N gateway. For DSL subscriber, you may consider this one – Asus DSL-N66U.

What this Product does

For DSL subscriber at home probably you’ve already had a simple network with a modem gateway connect to a desktop computer. The modem has only one Ethernet port and probably with single USB port. Wondering how to share the internet easily and wirelessly? Replace the existing modem with wireless modem gateway. You have a bunch of choices you can purchase in the store. One of the wireless DSL modem gateway you can consider is Asus DSL-N66U.

Main features

  • Wireless N900 technology
  • Built-in ADSL modem
  • Gigabit Ports
  • WAN port for Cable modem
  • 2x USB 2.0 ports
  • Two processors each for wired and wireless connection
  • AiCLoud
Asus DSL-N66U


This modem gateway is designed with various advanced technology including:

Wireless N900

For large home with couple of desktop computers, laptops and Android or iOS mobile devices N900 wireless technology powered to this gateway is more than enough for small to medium homes. DSL-N66U can deliver the wifi speeds of up to 900Mbps both bands. Your iPad and Laptop with dual band wifi adapters can connect using 5GHz band for better data rate throughput, ideal for streaming video and online gaming with the speeds of up to 450Mbps.

For your Android and smart-phone gadgets which operate in 2.4GHz band can connect on the other 2.4GHz band with the same speeds of up to 450Mbps. For large homes with more devices to accommodate you can consider Netgear D6200 which is based on recent 5th G wifi technology for the total bandwidth of up to 1200Mbps both bands.

Gigabit Ethernet


Like other wireless modem gateway such as Netgear DGND4000, this DSL-N66U gateway is also equipped with separate WAN port (besides 4x Gigabit LAN ports) in case you change broadband services from DSL to Cable or Fiber Channel services. You need to buy separate wireless router, you can connect the Cable modem to the WAN port of this gateway to operate this as the wireless router.

Other models of gateway do not equip separate WAN port but EWAN (Ethernet WAN) which allows you to use the port either as the LAN or WAN port, for example TP-link W8980 wireless N600 modem gateway. Linksys X2000 and X3000 also introduce EWAN port. This is reasonable because separate WAN port will be useless whenever the device operates as the Gateway. You will use the WAN port only if you operate the device as the wireless router when DSL service is not used.

Two USB ports

Printer and storage are two important networking devices you will frequently use regularly within the network either in homes or offices. It is therefore Asus DSL-N66U comes with two USB 2.0 ports to let you share the printer and storage simultaneously. DGND4000 also comes with two USB ports the same features as Asus but Netgear supports Time Machine that will allow your Mac users do the backup restore processes seamlessly.

Twin processors

What makes this Asus DSL-N66U different is the introduction of twin processors for each wired and wireless connection. One processor is specifically designed to process the DSL and VDSL connection and the other processor is used to process the wireless connectivity. Separate processor for each type of heavy duty processing tasks to maximize the performance for both types of connection.

Network diagram

For small businesses that deploy Windows server 2012 Essentials (WSE 2012), this gateway can be used to support the configuration of Windows remote automatically since the modem features UPnP. Even though you can configure manually by opening port 443 for secure remote connection. The following figure shows networking diagram for Asus DSL-N66U with Windows server 2012 connects to one of the Ethernet ports. Typically the small business server includes two NIC adapters you can connect both of them to the LAN ports of the modem gateway.

Asus DSL-N66U

All your Android and iOS mobile devices can connect to the network wirelessly either using 2.4GHz or 5GHz band, it is ideal for small businesses at home or small offices. See also best wireless routers for Android or iOS.

Comparison Asus DSL-N66U Vs Netgear DGND4000

Another product you may also consider is DGND4000 by Netgear which is engineered by wireless N750 wifi technology, slightly slower than DSL-N66U theoretically.  For convenient reading the following comparison table helps you understand the differences if any.

 Asus DSL-N66UNetgear DGND4000
Wifi technologyWireless N900Wireless N750
SpeedsUp to 450Mbps each bandUp to 300 Mbps (2.4GHz) + 450 Mbps (5GHz)
AntennaAsus AiRadar – beamforming antenna technology – Internal 2 dBi antenna x 3Internal antenna arrays
Ports4 x RJ45 10/100/Gigabits BaseT for LAN
1 x RJ45 10/100/Gigabits BaseT for WAN
1 x RJ11 for xDSL
One (1) ADSL2+ port


Five (5) 10/100/1000 (1 WAN and 4 LAN) Gigabit Ethernet ports with auto-sensing technology


USB ports2x USB 2.02x USB 2.0 with DLNA media server, share storage, share printer and share cloud
Cloud featureAsus AiCloud – Sync, Share, and Stream all of your contentReadySHARE Cloud – Remote access to USB hard drive



Memory16MB Flash/64MB DDR2 RAM for Modem/Router
64MB DDR2 RAM for Wi-Fi
128 MB flash and 128 MB RAM



Guest networksUp to 3x SSIDs each bandGuest network Each band

Apparently Asus shows superior features than DGND4000 regarding the hardware which separates the CPU for each of the modem/router and wifi device.

You may also like the newest version of Asus DSL-AC68U Wireless AC DSL Modem.

Cheers, KG

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