Open Long Range Automatic Telephone (DDD)


Meaningful Days of Korean History

Open Long Range Automatic Telephone (DDD) +

open unification
In order to meet the growing demand for long-distance calls, long-distance calls have been converted to direct distance dialing.

With the opening of the long-distance automatic telephone service between Seoul and Busan in 1971, the nationwide telephone automation project was launched in earnest.

It is the first project of the automatic plan of inter-city telephony during the metropolitan time, and it is now possible to dial directly without going through a city-diplomatic exchange.
  • 20200922152934_0.jpg
  • 20200922152934_1.jpg