All in one.
The Swedish designer Ralph Lysell was involved in developing the prototype for the telephone model for the telecommunications company LM Ericsson as early as 1941. Lysell was responsible for the basic design ideas for the appearance of the telephone in the end. The idea was put on hold and it was not until 1949 that Gösta Thames was commissioned by the company to produce a fully functional telephone. The work of creating a functional telephone for everyday use with a modern design, combined with finding space for the electronic components, became a challenge. The result was the so-called one-piece telephone, the Ericofon or Kobra as it came to be called.
To call and answer.
The Ericofon, which had been designed to stand on its own, was easy to place within the framework of the then idea that telephone jacks were usually placed in the hall. When it rang, you simply lifted the receiver and answered. When you said goodbye, you put the phone down on the hall table and the call was disconnected. To make a call, you lifted the phone and dialed the number on a dial pad at the bottom.