The Telecommunication Museum is located in the Old Post Office building at the eastern end of Stirling Terrace.
Entry is free and it is open daily.
The pole outside commemorates the opening of the telegraph link with South Australia, at the settlement of Eucla. Eucla is probably the smallest town to be shown on maps of the world, it's population is a few hundred. This is probably because it's hundreds of miles from anywhere. As was usual in colonial days the states used different systems, WA used one form of morse code and SA used another. They also had clocks set to their own timezones.