When key were depressed, pulses were generated electronically that corresponded to those produced by a dial. ![]() Pulse dialing was used when the telephone was connected to conventional telephone stations. The Diavox contained much more electronics than previous phones. The final choice was a design produced by Breger & Co. A total of ten different design proposals were submitted, which were eventually reduced to two. It was also desirable to be able to use the telephone as a starting point for special models.īecause design is extremely important for telephones, four industrial designers were contracted to design the new phone. The microphone was to have an extended frequency range and provide better speech quality than previous models. It should also be possible to equip it with a dial. The requirements for the new phone included that it should have a separate receiver and be equipped with a keypad for either tone or pulse dialing. The goal was that it should be possible to launch the phone in 1978. The working group recommended that Ellemtel should be given the assignment to develop a telephone for the future. Studies in other countries largely confirmed the results obtained from studies in Sweden. Interviews were conducted with experts at Ericsson, Televerket and Ellemtel. ![]() A working group was appointed, and extensive preparations were made that included a survey of development trends in 13 countries and a study of the Swedish market. In the spring of 1969, Ericsson and Televerket, Swedish PTT, decided to work together on developing a new telephone. The first Ericsson keypad phone was named the Diavox. One prerequisite was that the new phones should have a keypad, instead of the traditional dial. With the shift to a new generation of telephone technology from electromechanical switching to electronics and computer control, a new generation of phones was needed that could take advantage of the services offered by the new technology.
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