Up an Edimax Extender with a Dual-Band Router to Use Both Bands

Most Australian households running on the National Broadband Network rely on the modem-router supplied by their ISP, whether that's a Telstra Smart Modem, an Optus Wi-Fi Modem, or a unit from Aussie Broadband or Belong. The trouble is that the Wi-Fi signal those gateways produce often fades by the time it reaches the back of a brick veneer home in suburban Brisbane or a double-storey townhouse in Melbourne's inner west. A dual-band extender from Edimax can stretch both the 2.4GHz and 5GHz networks into those dead zones, but only if it is set up to actually broadcast on both frequencies rather than just repeating a single band.

The process looks technical at first glance, especially when you see references to WPS, repeater mode, and bridge mode in the manual. Once you understand what each term means in plain English and follow a logical order, the whole configuration can take less than fifteen minutes. This walkthrough covers how to wire the extender into your existing dual-band router, configure both frequencies through the browser interface, and pick the right operating mode for the kind of home layout common across Australian suburbs.

How Dual-Band Extenders Actually Work

A Wi-Fi extender does not create a new internet connection. It listens to your existing wireless signal and rebroadcasts it further into your home. The dual-band versions, such as the Edimax EW-7438 series or the EW-7478, listen and rebroadcast on two frequencies at once: 2.4GHz and 5GHz.

The 2.4GHz band travels farther and punches through walls more effectively, which suits older Queenslander homes with thick timber boards or Adelaide bungalows built before modern insulation standards. The 5GHz band delivers faster speeds over shorter distances, making it ideal for streaming, video calls, and gaming in rooms close to the extender. When set up correctly, the extender maintains two separate network names, often labelled with a suffix like _EXT or _5GEXT, so your devices can choose the appropriate frequency depending on where you are in the house.

The catch is that an extender can only repeat what your main router sends out. If your router only broadcasts on one band, the extender will not magically produce two. That is why pairing an Edimax unit with a true dual-band router is essential, and why understanding your main router's settings matters before you start.

Preparing Your Network Before Plugging Anything In

Before you even open the Edimax box, have a quick look at the network you are trying to extend. Log into your main router, usually through 192.168.0.1 or 192.168.1.1, and confirm that both 2.4GHz and 5GHz SSIDs are enabled and visible. If you are on an NBN FTTC or HFC connection through a provider like TPG or iiNet, the supplied gateway often has both bands running by default but may have the SSIDs hidden or merged under a single name.

Write down the existing network names and passwords. You will need those exact characters when configuring the extender, and case sensitivity matters. If your router sits near the front of the house, which is typical in newer Perth developments where the garage is at the front, plan to place the extender roughly halfway between the router and the room where signal drops off. A general rule of thumb for Australian homes is to position the extender no more than two rooms away from the main router, in a spot where your phone still shows two or three bars of Wi-Fi.

Keep the extender's default credentials handy. Most Edimax units ship with the admin username admin and password 1234, though some newer models use a unique password printed on the back. The default gateway address is typically 192.168.2.2, which you will type into a browser to reach the Edimax setup page. If you want a more detailed walkthrough of these initial steps, the Edimax setup guide has screenshots for the most common Australian router pairings.

Connecting the Extender to Your Router

There are two practical methods to join the extender to your existing wireless network: WPS and the browser-based setup wizard. WPS is faster when it works, but the browser method gives you more control over which bands the extender rebroadcasts.

For the WPS route, plug the Edimax extender into a power point roughly halfway between your router and the dead zone. Wait about thirty seconds for the LED to settle, then press the WPS button on the extender followed by the WPS button on your main router within two minutes. The extender should clone the SSID of the 2.4GHz band automatically. To repeat the 5GHz band, you will usually need to run the WPS sequence again on the extender's 5GHz button or repeat the process through the browser interface, since most consumer routers only push one band through WPS at a time.

The browser route starts by connecting your phone or laptop to the extender's open network, which usually appears as Edimax.Setup or similar. Once connected, open a browser and navigate to 192.168.2.2. The setup wizard will scan for nearby wireless networks and let you choose both your 2.4GHz and 5GHz SSIDs from the list. Enter the password for each, choose whether to keep the same network names or create distinct ones, and save. The extender will restart and come back online broadcasting both frequencies.

Configuring Both Bands for Australian Conditions

Once the extender is online, log back into 192.168.2.2 and head into the wireless settings. Most Edimax firmware builds a separate tab for each frequency, letting you tweak channel, channel width, and transmission power independently. In Australia, the 2.4GHz band has 13 usable channels, with channels 1, 6, and 11 being the non-overlapping choices that minimise interference in densely packed suburban streets. For 5GHz, you have access to UNII-1 and UNII-3 bands, which are largely uncluttered in regional areas but can get busy in apartment-heavy parts of Sydney or Melbourne CBD.

Set the channel width to 20MHz on the 2.4GHz side for maximum compatibility with older devices, particularly smart home gear and older tablets that might still be floating around the house. On the 5GHz side, you can safely use 40MHz or 80MHz channel width to take advantage of higher throughput, which matters if you are pushing 4K Netflix through an NBN 250/100 plan or higher. Keep transmission power at maximum unless you live in a small apartment where a weaker signal helps avoid overlap with your neighbour's network.

Give the two extended networks recognisable names so devices do not get confused. A common Aussie approach is to keep the original SSID for 5GHz and add a suffix like _2.4G for the slower but more reliable band. That way your smart TV in the living room connects to the fast 5GHz extension automatically, while the older Kindle in the back bedroom roams onto the 2.4GHz extender without manual switching.

Choosing the Right Operating Mode

Edimax extenders typically offer three operating modes: repeater, access point, and router. For most Australian households, repeater mode is the right choice because it extends the existing wireless network without requiring extra cabling. The extender simply takes what your router sends and rebroadcasts it further.

Access point mode is useful when you can run an Ethernet cable from the main router to the extender, which is often feasible in newer builds with structured cabling or in homes where the data point sits in the middle of the house. In access point mode, the extender creates a fresh dual-band network with full bandwidth on both frequencies, avoiding the speed loss you get when the extender has to receive and transmit on the same band. If your main router is in the garage and you have a Cat6 cable running into the living room, access point mode will outperform repeater mode every time.

Router mode turns the Edimax into a standalone router, which is not what you want here unless you are replacing the gateway entirely. If you are unsure which mode your unit is set to, the operating mode is usually found under Administration or System Tools in the setup page.

Sorting Out Common Multi-Band Setup Issues

Even with a careful setup, a few issues tend to pop up. The most common one in Australian homes is the extender broadcasting both bands under the same SSID, which causes roaming problems as devices hop between the main router and the extender mid-task. Switching to separate SSIDs solves this immediately.

Another recurring issue is the 5GHz extender dropping out in rooms more than two walls away from the unit. This is a physical limitation of the band rather than a fault. If you need 5GHz coverage at the back of a long block, consider a second extender placed in access point mode halfway along the path, with Ethernet backhaul where possible. Brick, concrete, and the foil-backed insulation common in Western Australian homes all chew through 5GHz signals faster than 2.4GHz.

If the extender fails to pick up your 5GHz network during setup, check that your main router is not set to channel 149 or higher. While these channels are legal in Australia, some older Edimax firmware does not scan them. Manually setting the router to a UNII-1 channel like 36 or 40 usually resolves the issue.

Practical Settings to Confirm Before You Finish

A few quick checks will save you from troubleshooting later. Run through these once both bands are configured:

• The extender is placed between the router and the dead zone, not at the far end of the house
• Both 2.4GHz and 5GHz extended SSIDs are visible from your phone in the problem room
• Channel widths are set to 20MHz for 2.4GHz and 40 or 80MHz for 5GHz
• The extender firmware is updated to the latest version available through the admin page
• The main router's Wi-Fi passwords match what you entered on the extender for both bands

Quick Checklist for Dual-Band Success

Before considering the job done, confirm the basics that most people forget:

• Main router SSIDs and passwords recorded on paper
• Extender placed at the halfway point with at least two bars of signal
• Both 2.4GHz and 5GHz networks verified working in the previously dead zone
• Separate SSIDs set for each frequency to avoid roaming confusion
• Extender firmware updated through the admin dashboard

A dual-band extender only earns its keep when both frequencies actually reach the rooms that need them. Walk to the spot in the house where Wi-Fi used to cut out, run a quick speed test on both the 2.4GHz and 5GHz extended networks, and confirm the speeds match what your NBN plan delivers to the main router. If the 5GHz extension is dragging below 50Mbps in the back bedroom, try moving the extender one room closer to the router or switch it to access point mode with a wired backhaul. The real test is the same usable bandwidth in every corner of the home that the front of the house already enjoys.