GrandstreamNetworks HT818 VoIP telephone adapter

Not a cheap purchase, however, replaced a tired and noisy London 16. Power pack works fine 110-240 vac. Worth it for legacy loop disconnect (dial) telephones. Really easy to set up the parameters needed.

Just purchased one of these from VoiPon because Amazon's delivery would have been too slow. At the moment the phone lines only register sometimes (randomly), but the immediate problem was that when you rang one of the BT analog phones through FreePBX, the bells did not ring (although you could answer the call). After reading many online questions and answers without success, I remembered the "anti-tinkle" circuit dating back to pulse dialing phones required a master socket with a capacitor to connect the phone bell. You can also use an ADSL filter because apparently that also has a "ring" capacitor inside it. All phones ring now.So in summary, BT analog POTS phones need a capacitor to connect the 3rd wire (found in master sockets and ADSL filters) so that the bell will ring. (An old US phone I had seems not to need the capacitor.)

Item ships with EU power adaptor not UK power adaptor. Will be returning.