DECT to POTS

Would these work for you?

Otherwise could you just use an ATA, registered to the same account, for it?

Well that's the sort of thing and it even uses DECT but I don't think you can pair the slave with anything other than an RTX master. The pairing process appears to involve joining master/slave with a cable.

The ATA idea popped into my head 2 ms after pressing send but that seems a bit overkill and involves wires. I was sort of wanting something small and battery powered, there is quite a bit of space inside a Bell 50c...

Butcher an old dect handset, switched 25 Hz oscilator, into 15:1 step up transformer(*) to drive the bell?

(*) Small mains jobbie with 15 V secondary?

account,

router

Careful configuration of IP address's, ports and port forwarding ought to solve that. But I agree VOIP and NAT are not happy bed fellows.

The DECT POTS/VOIP base is already connected to a POTS line, which is used for incoming calls but also makes the DECT handsets ring. It's getting a proper bell to ring when VOIP calls arrive that is the problem. The DECT base doesn't have any FXS ports.

This any help?

Only if like mine, it has an attendant ATA or two.