I'm current using maxis provided router TP-Link Archer c5v ac1200 and i'm planning to get a new router, probably tp-link ax series router.

But there a problem. My maxis plan have a phone line, and its connected to the c5v router that have a rj11 port. If i changed a new router without rj11 port i cant use the phone.

My modem Huawei EchoLige HG8240H5 have a rj11 port and i noticed some unfi user connect their dect phone to the modem (same model), i tried but its not working the phone (only have beeping sound, tel indicator dint light even i pick up the phone). The phone only can work by connect the router, even i unplug the rj11 cable the voip indication still solid (blinking if have incoming call or during call).

How to solve this problem if i change a new router? Is there any solution to make the phone work on modem?