Wifi 2.4 and 5 GHz
quentin2121 Posted messages 9063 Registration date Status Membre Last intervention -
I know, the question has been asked 15 times, I can't find it anymore.
SFR offered me a free exchange of my NB6 for a "more powerful" Box, let's go; from experience, it is the NB6 "Power" whose only difference seems to be the dual-band Wifi, both activated by default in the Box.
I believe I remember that the 5 GHz would be more powerful but with a shorter range, which I couldn't care less about, only my phone is connected to it at home, so the question is very theoretical.
When reconfiguring this phone for the Wifi network, it only offers a Box identifier and automatically connects in 2.4 GHz without giving me a choice (by the way, it's the same if I do it from the PC by activating the Wifi which is never on).
Should we understand that the switching does not occur and that it is up to me to disable one or the other of the 2 bands in the Box if I want to?
Thank you.
5 réponses
Hello brucine.
For the box, I don't know since I don't live in France, so I'm unaware of the configurations offered by it.
In principle, in a modern box, you should be able to configure either one or the other, or both.
When you configure to use both simultaneously, then the device (here the phone) will choose according to its capabilities (it must be compatible) and its configuration; it is also often possible to tell it to use only 2.4 or 5 or whatever it finds.
Bat
Hello Brucine,
I haven't tried, but could you possibly create two different SSIDs based on the frequencies, and when you connect, choose either one or the other depending on your needs?
2.4 ghz > Less powerful, but has a long range
5 ghz > more powerful, but has a shorter range
6 ghz > hair burning ;-)
Edit :
It is indeed possible to disable one or the other frequency, and normally, if both are active, the device using the Wi-Fi network should (depending on its settings) switch automatically.
Hello,
Hair, what little I have left, the danger is under control.
The Box has by default 2 different SSIDs, SFR_XXXX and SFR_XXXX_5GHZ.
If I uncheck SFR_XXXX in the Box, I lose Wifi on my phone (normal), and if I search for nearby Wifi networks, nada, there’s nothing left.
The same experience conducted on the PC requires me to re-authenticate on the same SSID with my password, showing that there has indeed been a modification, but it fails.
Another hypothesis is that my PC and its pre-diluvial network chipset do not support 5 GHz, and the same for the phone; I need to check this last point out of curiosity (also archaic, Samsung J7 2016).
For both of you, upon verification, the phone can only use the 2.4 GHz band, that's why your daughter is mute; to test a possible WiFi auto-switching on either band, a device that has the 5 GHz WiFi band would be needed, I don't have that item except maybe my TV and my multimedia gateway, I haven't tested.
Hello Brucine,
I am also looking for the 2.5 GHz and 5 GHz on my SFR NB6 box. Can you tell me when you had it, or were you configuring it in its online interface?
Hello,
As I mentioned earlier, it does not exist in the standard NB6 (white) but only in the "Power" model (black and vertical) where it can be found in the administration under Wifi-Configuration.
There are (apart from the Hotspot enabled by default) 3 items: 2.4 GHz, 5 GHz, and Guest configuration that can be turned on and off with the ON/OFF button; each has a different SSID, the default password (this time in the Wifi security section) is shared between the 2 bands (as well as the one displayed on the Box), and it is different for the guest configuration.
It all looks "classic" to me then.
To check if everything is okay and that you indeed have something that's dual (2.4/5), as suggested, try changing the SSID at least temporarily, disable the 2.4, retest with a Wifi detection and don't hesitate to "forget" your wifi hotspot before searching. If you can't see the 5G, either it's not working, or the phone has a problem.
If it sees it, everything is fine and "forgetting" may have restored things. Reactivate both.
Sometimes, on the contrary, I have to switch to 2.4 "only" because I have various devices that aren't 5 compatible, and if I have to reconfigure them when DUAL is active, it doesn't work. So I switch back to 2.4, reconfigure/reconnect them, then I reactivate everything with the same SSID and password (plus I have two hotspots in the house, which allows for automatic switching from one to the other.)
Guest, as its name indicates, uses both but allows for an independent hotspot that only provides internet access and nothing else from the LAN.
In <8> I was commenting on the question about the location of the settings in <3>.
As for me, the Hotspot item is still disabled and, as I summarized in <4> and <7>, I alternatively disabled one or the other of the bands: when only the 5 GHz is active, I see nothing from my phone, I see the SSID SFR_XXXX (which corresponds to 2.4 GHz) from my PC on Wi-Fi, while I should see the SSID SFR_XXXX_5GHZ (which corresponds to 5 GHz); it asks me again for my password (while on 2.4 GHz it shouldn't and it's common) and does not connect.
But all of this seems normal since neither my phone nor my PC have 5 GHz capability.
Hello,
I'll add a layer of "bring your little science", it's one of my many vices, because WiFi 5 GHz is not necessarily more powerful as stated here than 2.4.
It's more efficient in 802.11ac or ax (WiFi 5 and WiFi 6) but not in WiFi 4 (802.11n) where it only provides a less crowded band, no additional technology.
Also, there is a difference in the 5 GHz band between the low channels which are limited to low power (like 2.4) while the high channels (known as DFS) are allowed more radio power (1w instead of 20mW), when they have tested their environment via DFS....
And there you go....
But goodness, how annoying the line spacing is!!
No,
if you were equipped with modern equipment, wifi 5 and 6 technologies really enhance both speed and reliability compared to wifi n from 10 years ago, mainly due to the available radio band on higher frequencies, but hey, it's not night and day either, let's say it fits better with fiber connections, where wifi bgn is outpaced while it wasn't under ADSL, at least in terms of internet access, but since everything is handled through that now, thanks to the cloud ....
Hello Brupala!
Regarding the SFR NB 6 box, I don't have a choice between 2.5 GHz and 5 GHz, my connectivity issue with an outdoor camera seems to have nothing to do with that! I'm looking for a solution, if you're interested, thank you!
Hello!
Although each mode has its own advantages and disadvantages (range and power as already mentioned above), in any case, we will have to adapt according to the equipment we have at home ultimately.
Personally, I would have preferred the 5GHz, knowing that I have a fairly small house indoors, and that the range of WiFi 5 is more than sufficient, but ultimately I find myself forced to switch to 2.4GHz because of surveillance cameras I have at home that only work on 2.4GHz ( https://www.camerasurveillance.net/51-camera-wifi-dome-exterieure-motorisee-zoom-hd.html ).
From what I understand, after looking into this "anomaly," almost all surveillance and smart home devices are not compatible with 5GHz, so adjustments need to be made. I think your problem might really come from that @quentin2121 StatutMembre