If you’ve received dual band modem, you'll have the option to connect to two different WiFi networks. In this article, we’ll explain what a dual band modem is.
Dual band refers to a modem that works on the 2.4GHz & 5GHz Wireless frequencies.
Our current Optus supplied dual band modems include:
The main differences between the two frequencies are how they effect the range and speed of your WiFi signal as well the ease of which they can pass through solid objects (known as penetrability).
As a general rule, lower frequencies like the 2.4GHz band can travel further, are better at passing through solid objects but transmit data at a lower rate (when your device is within close range to your modem).
On the other hand, higher frequency bands such as the 5GHz band can't travel as far, have a harder time passing through dense material but offer superior speeds when your device is within close range to your modem.
Function 2.4GHz 5GHz
|Speed||Slower maximum potential speeds||Faster maximum potential speed|
|Signal Range||Less signal loss over longer distances (can be susceptible to interference from other devices working on the same frequency band)||
Greater potential for signal loss over further distances
|Penetrability||Signal can pass through solid objects with greater ease||Signal has a harder time passing through dense solid material|
Connect to the 5GHz band when:
Connect to the 2.4GHz band when:
In most cases, the 5GHz band will enabled by default. When searching for available WiFi networks, you’ll see the option to connect to both the 2.4GHz or 5GHz WiFI Network (SSID). The two networks should share the same password. You can change the name of your WiFi network and password via the modem GUI (the setting and configuration page).
The device that you're using to connect to your Home WiFi network must support AC WiFi. Most newer devices are compatible with both the 2.4GHz and 5GHz bands. If you're not sure, check your device specs (either on the manufacturers website or printed on the packaging). You'll want to look out for 802.11ac (normally listed under Wireless connectivity or WLAN).
If you're considering a WiFi range extender, you'll also want to make sure that it offers Dual Band connectivity.
I've been told that when the nbn is first connected, the speed is always slow and after about a week it gets to the speed you pay for eg 50/20 etc but it will get faster each day for a week or 6 weeks. Is this correct?
Is that something that we've advised @gearboxx? It's the first I've heard of such a thing.
What sort of speeds are you seeing on your end?
What type of NBN is connected in your area i.e. NBN-HFC, FTTP,FTTB,FTTN? If you have an NBN connection box (network termination device), try connecting a laptop or desktop directly into the assigned UNI-D port. If you run a speed test. that’ll give you the best indication of the speeds the service is able to achieve.
I have a Canon wireless printer. Since connecting to NBN the device casn't be found. Canon advised the printer is only compatible with 2.4Ghz not 5Ghz. I have a Sagemcom dual band modem. If I set it up to operate on both bands, does this mean I need to select the 2.4Ghz band when trying to print/scan, then revert to 5Ghz for usual internet?
Hi @Piecone, your internet will work on both the bands - 2.4Ghz and 5Ghz. Lower frequency (2.4Ghz) means longer Wi-Fi range while high frequency 5Ghz means short Wi-Fi range. You can connect some device on 2.4Ghz and some on 5Ghz if you wish. Since your printer is only compatible with 2.4Ghz as such you need to make sure the device you are printing from is also connected to the same band - 2.4Ghz to print it wireless.