The "PMG" stamp can still be found on many manhole
covers, such as this one in central Perth
The Postmaster-General's Department (PMG) was created at Federation in 1901 to take over all postal and telegraphic services within Australia from the states and administer them on a national basis. Its minister was the Postmaster-General. In mid-1975 it was disaggregated into the Australian Telecommunications Commission (trading as Telecom Australia) and the Australian Postal Commission (trading as Australia Post). It also controlled radio and television broadcast licensing, which is now controlled by the Australian Communications and Media Authority. Telecom Australia changed its name to Telstra in 1995 and has since been privatised.
List of Postmasters-General and Ministers for Communications
See Minister for Broadband, Communications and the Digital Economy (Australia)#Australian Postmasters-General and Ministers for Communications
Early history (telephony)
The earliest telephone exchanges in Australia date back to 1880 (Melbourne). All phone calls were manually switched by human operators. The Melbourne exchange opened with just 44 customers.
The first automatic exchange opened in 1912, featuring electromechanical switching equipment. Cross-bar systems started appearing in 1960. Electronic switching began in the late 1970s.
The Victorian Telecommunications Museum houses examples of old technology used since the PMG's inception.