Okay, that's interesting. When I set up my router to Maxis Fibre mode, it says VOIP on LAN port 3(!?) which makes no sense as RJ45 LAN ports aren't made for analogue phones.

Anyway, now that you mention it, I'm going to try to set up the Archer C5v to connect to the ASUS' LAN port 3 via the WAN interface and see if that works. Never thought of trying that, but I hope it turns out well. I don't mind having another device turned on (and doing nothing except providing VOIP) rather than not being able to use the free phone calls feature.

Thanks mate.

How about latest result? Is it work?
I plan to buy new router “asus ac86u” to become main router. And change “acher c5v” (maxis provide) to second AP router. That voIP phone unit still work?

I get your mean.
Another question. If i still use “tp link archer” be main router. And use “asus ac86u” be AP router.
Is it will slow down asus router performance?
I mean cannot unleash 100% power of asus.
Because i concern gaming latency.

Hi is this still working fine for you?

I know this post was 3 years ago, but I have the same question o this. I just installed Maxis broadband, they gave me latest wifi6 router (black colour with stand), but I prefer to use Asus latest wifi6 router. This Asus router does not come with rj11 port, so what I need to do is just connect lan3 Asus router port to Maxis router wan port? how about Maxis broadbank acc? Shall I setting it on Asus router and disable it on Maxis router? The Maxis phone acc setting remain on Maxis router? Pls help me as I prefer Asus Technology and it air mesh system.