andrea on Nostr: I use my own router, however i wasn't able to use openwrt due to the fact that i need ...

I use my own router, however i wasn't able to use openwrt due to the fact that i need to handle also phone calls by sip that are integrated in the router by rj11 ports. Do you know if does exist a openwrt firmware also for such kind of routers that include voip by rj11 ports ?