Oticon lives well for land line telephones using blue tooth access.
I have been using this adapter for about 10 years after I started wearing Oticon hearing aids. Then I had to update to a modern hearing aide and they did not offer such an adapter except at a hug price. So I decided to try the Oticon adapter and found it worked as well as it did with the Oticon hearing aides. I have bought a new adapter when the older ones decided they had an end to life. Since I have no way to draw or attach pictures I chose not to try.