|SingTel Optus Pty Limited
|legal form||Pty Limited|
|Seat||Sydney , Australia|
|Number of employees||10,575 (1st quarter 2008)|
|sales||8.3 billion AUD (2008)|
SingTel Optus is the second largest telecommunications company in Australia (as of 2009) and a wholly owned subsidiary of Singapore Telecommunications (SingTel). The company operates primarily under the Optus brand; The group also includes subsidiaries such as Virgin Mobile Australia and Boost Mobile in the mobile communications market, Uecomm in the market for network services and Alphawest in the ICT sector.
Optus operates its own network infrastructure and also uses services from other network service providers, especially Telstra Wholesale (as of 2009). It offers services both directly to end users and to other service providers.
The company was originally known as AUSSAT Pty Limited prior to privatization in 1981 , before being renamed Optus Communications Pty Limited in 1983 . In 1982 the first telecommunications satellite (Optus A1) was ordered from Hughes and launched in 1985. In 1998 it was briefly renamed Cable & Wireless Optus Pty Limited after the British company Cable & Wireless took over a large part of the shares before it was bought by SingTel in 2001 and given its current name.
|Hughes||August 27, 1985||Space Shuttle Discovery STS-51-I||Cemetery orbit||Based on the Hughes HS-376 satellite bus .|
|Hughes||November 27, 1985||Space Shuttle Atlantis STS-61-B||Cemetery orbit||Based on the Hughes HS-376 satellite bus.|
|Hughes||September 16, 1987||Ariane 3||Cemetery orbit||Based on the Hughes HS-376 satellite bus.|
|Optus B1||Hughes||August 13, 1992||Long march LM-2E||Cemetery orbit||Based on the Hughes HS-601 satellite bus .|
|Optus B2||Hughes||December 21, 1992||Long march LM-2E||-||Based on the Hughes HS-601 satellite bus. The satellite was destroyed on launch because the payload fairing collapsed on launch.|
|Optus B3||Hughes||August 27, 1994||Long march LM-2E||164 ° East||Based on the Hughes HS-601 satellite bus.|
|Optus C1||Space Systems / Loral||June 11, 2003||Ariane 5G||156 ° East||Based on the SSL satellite bus LS-1300 .|
|Optus D1||Orbital Sciences Corporation||October 13, 2006||Ariane 5 ECA||160 ° East||Based on the Orbital STAR 2 satellite bus .|
|Optus D2||Orbital Sciences Corporation||October 5, 2007||Ariane 5GS||152 ° East||Based on the Orbital STAR 2 satellite bus.|
|Optus D3||Orbital Sciences Corporation||August 21, 2009||Ariane 5 ECA||156 ° East||Based on the Orbital STAR 2 satellite bus.|
|Optus 10||Space Systems / Loral||September 11, 2014||Ariane 5 ECA||164 ° East||Based on the LS-1300 satellite bus.|
Orbital positions of the Optus satellites