Singtel Optus Pty Limited is an Australian
telecommunications
Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ...
company headquartered in
Macquarie Park
Macquarie Park () is a suburb in the Northern Sydney region of Sydney, New South Wales, Australia. Macquarie Park is located 13 kilometres north-west of the Sydney central business district in the Local government in Australia, local government ...
, a suburb in the
Northern Sydney region of
Sydney
Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...
,
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...
, Australia. It is a
wholly owned subsidiary
A subsidiary, subsidiary company, or daughter company is a company completely or partially owned or controlled by another company, called the parent company or holding company, which has legal and financial control over the subsidiary company. Unl ...
of
Singapore
Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...
an telecommunications company
Singtel
Singapore Telecommunications Limited, trading as Singtel, is a Singaporean telecommunications conglomerate, the country's principal fixed-line operator and one of the four major mobile network operators operating in the country.
Overview
T ...
.
Optus is the second-largest telecommunications company in Australia, with over 11 million customers as of 2023.
Its mobile network covers 98.5% of the Australian population, with plans to cover 100% of Australia by 2025 through its partnership with
SpaceX
Space Exploration Technologies Corp., commonly referred to as SpaceX, is an America, American space technology company headquartered at the SpaceX Starbase, Starbase development site in Starbase, Texas. Since its founding in 2002, the compa ...
.
History
AUSSAT and deregulation (1981–1990)
Optus can trace its beginnings back to the formation of the Government-owned AUSSAT Pty Limited in 1981. In 1982, Aussat selected the Hughes 376 for their initial satellites, with the first, AUSSAT A1, launched in August 1985. AUSSAT satellites were used for both military and civilian satellite communications, and delivering
television
Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of transmission. Television is a mass medium for advertising, ...
services to remote
outback
The Outback is a remote, vast, sparsely populated area of Australia. The Outback is more remote than Australian bush, the bush. While often envisaged as being arid, the Outback regions extend from the northern to southern Australian coastli ...
communities.
With Aussat operating at a loss and with moves to
deregulate telecommunications in Australia, the government decided to sell Aussat, coupled with a telecommunications licence. The licence was sold to Optus Communications – a consortium including:
* logistics firm
Mayne Nickless (24.99%);
*
UK telecommunications company
Cable & Wireless (24.50%);
*
US telecommunications company
BellSouth (24.50%);
* AIDC Limited (10.00%);
* insurance and investment company
AMP (10.00%); and
* insurance and investment company
National Mutual (6.02%).
The new telecommunications company was designed to provide competition to then government owned telecommunications company ''Telecom Australia'', now known as
Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecomm ...
.
Founding of Optus (1991–present)
Optus gained the second general carrier licence in January 1991.
After privatisation, AUSSAT became Optus and its first offering to the general public was to offer long-distance calls at cheaper rates than that of its competitor Telstra. The long-distance calling rates on offer were initially available by consumers dialing ''1'' before the area code and phone number. Following this, a ballot process was conducted by then regulator
AUSTEL, with customers choosing their default long-distance carrier. Customers who made no choice or did not respond to the mailout campaign automatically remained as a Telstra long-distance customer. Customers who remained with Telstra could dial the override code of ''1456'' before the area code and phone number to manually select Optus as the carrier for that single call. Since 1 July 1998, consumers have the choice of preselecting their preferred long-distance carrier or dialling the override code before dialling a telephone number.
The group began by building an interstate
fibre optic cable and a series of exchanges between Optus' interstate network and Telstra's local network. It also laid fibre optics into major office buildings and industrial areas, and focused on high bandwidth local, (interstate) long distance, and interstate calls for business. In its early years, Optus was only able to offer local and long-distance calls to residential customers through Telstra's local phone network. Telstra would carry residential to residential calls to Optus' exchanges, and then the calls would be switched to Optus' long-distance fibre optic network.
In 1993 Optus, along with Telstra and
Vodafone
Vodafone Group Public Limited Company () is a British Multinational company, multinational telecommunications company. Its registered office and global headquarters are in Newbury, Berkshire, England. It predominantly operates Service (economic ...
were licenced by the regulator Austel (now
ACMA) to provide
2G GSM
The Global System for Mobile Communications (GSM) is a family of standards to describe the protocols for second-generation (2G) digital cellular networks, as used by mobile devices such as mobile phones and Mobile broadband modem, mobile broadba ...
mobile telephony. Optus's mobile service launched in May of that year.
In 2024, Singtel held advanced talks with
Brookfield to sell a 20% stake in Optus. Brookfield and Singtel were unable to agree on terms, with Singtel claiming afterwards it remained committed to Optus and the Australian market.
Products and services

Key Optus products and services include:
Voice
* Residential and Commercial
POTS for local and long-distance telephony
* Commercial
VoIP
Voice over Internet Protocol (VoIP), also known as IP telephony, is a set of technologies used primarily for voice communication sessions over Internet Protocol (IP) networks, such as the Internet. VoIP enables voice calls to be transmitted as ...
and
VoDSL
*
Intelligent Network applications, such as
free call,
1300 and
Interactive voice response
Interactive voice response (IVR) is a technology that allows telephone users to interact with a computer-operated telephone system through the use of voice and DTMF tones input with a keypad. In telephony, IVR allows customers to interact with a ...
services
Wireless .
*
4G/
LTE provided on 700 / 1800 / 2100 / 2300 / 2600 MHz covering 96.6% of the population.
*
5G provided on 2300 MHz and 3500 MHz.
*
Satellite telephony covering all of Australia.
Internet access
*
NBN Internet (via
Cable
Cable may refer to:
Mechanical
* Nautical cable, an assembly of three or more ropes woven against the weave of the ropes, rendering it virtually waterproof
* Wire rope, a type of rope that consists of several strands of metal wire laid into a hel ...
,
FTTB,
FTTC,
FTTN,
FTTP,
Fixed wireless and
Satellite
A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation ( GPS), broadcasting, scient ...
)
* Residential
Dial-Up Internet in all states
* Residential
Broadband Internet
In telecommunications, broadband or high speed is the wide- bandwidth data transmission that exploits signals at a wide spread of frequencies or several different simultaneous frequencies, and is used in fast Internet access. The transmission m ...
(via
cable
Cable may refer to:
Mechanical
* Nautical cable, an assembly of three or more ropes woven against the weave of the ropes, rendering it virtually waterproof
* Wire rope, a type of rope that consists of several strands of metal wire laid into a hel ...
and
DSL
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric di ...
) in all states (except the
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regi ...
).
* Commercial and wholesale internet access
* Secure Gateway services for Federal Government departments
* NBN Wireless – not continued for new connects
Television
*
Optus Television service provided in
Sydney
Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...
,
Melbourne
Melbourne ( , ; Boonwurrung language, Boonwurrung/ or ) is the List of Australian capital cities, capital and List of cities in Australia by population, most populous city of the States and territories of Australia, Australian state of Victori ...
and
Brisbane
Brisbane ( ; ) is the List of Australian capital cities, capital and largest city of the States and territories of Australia, state of Queensland and the list of cities in Australia by population, third-most populous city in Australia, with a ...
, including
Foxtel Digital
Retail services are sold to customers via phone, internet or through retail outlets, especially
franchise chains such as Optus World, Network Communications,
Strathfield,
TeleChoice, and
Allphones.
Optus' Customer Solutions and Services (CS&S) organisation is responsible for providing support to Optus Business customers. CS&S works with Optus' subsidiary
Alphawest to support
information technology
Information technology (IT) is a set of related fields within information and communications technology (ICT), that encompass computer systems, software, programming languages, data processing, data and information processing, and storage. Inf ...
services across Optus' large business, corporate and government client base.
Subsidiaries
A number of notable wholly owned subsidiaries operate as part of the Singtel Optus group. These are:
* Information Technology & Network Services
**
Alphawest
**
Uecomm
* Mobile Telephony
**
SIMplus
**
Virgin Mobile Australia
**
Amaysim
Until 20 January 2013, Optus sold mobile services under the brand name
Boost Mobile.
Optus also has a 50% stake in the now defunct
OPEL Networks.
Other wholly owned subsidiaries of note no longer have a significant active role as individual entities. These are as follows:
Reef Networks was formed in 1999 to provide an
optical fibre link between
Brisbane
Brisbane ( ; ) is the List of Australian capital cities, capital and largest city of the States and territories of Australia, state of Queensland and the list of cities in Australia by population, third-most populous city in Australia, with a ...
and
Cairns
Cairns (; ) is a city in the Cairns Region, Queensland, Australia, on the tropical north east coast of Far North Queensland. In the , Cairns had a population of 153,181 people.
The city was founded in 1876 and named after William Cairns, Sir W ...
in
Queensland
Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...
. Optus gained exclusive access to this link in 2001, ahead of acquiring the organisation in 2005.
XYZed was established by Optus in 2000 to provide wholesale business-grade
DSL
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric di ...
services under an individual brand, but today provides a collection of products only as part of the Optus Wholesale & Satellite division. XYZed established a network of
DSLAMs inside
Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecomm ...
telephone exchanges, utilising
Unconditioned Local Loop services to reach end users.
Corporate affairs
Chief Executive Officer
Kelly Bayer Rosmarin commenced as CEO of Optus and Consumer Australia on 1 April 2020. She resigned on 20 November 2023.
Hybrid fibre-coax rollout
These practices meant that Optus was the largest customer of Telstra. To become competitive Optus would need to lay its own local phone network. To provide a
killer application for this, the Australian Federal government sold subscription television licences. Optus, as well as the
Seven Network
Seven Network (stylised 7Network, and commonly known as Channel Seven or simply Seven) is an Australian commercial free-to-air Television broadcasting in Australia, television network. It is owned by Seven West Media, Seven West Media Limited, ...
, businessman
Kerry Stokes and American cable company Cablevision, formed the
Optus Vision consortium.
News Corporation
The original incarnation of News Corporation (abbreviated News Corp. and also variously known as News Corporation Limited) was an American Multinational corporation, multinational mass media corporation founded and controlled by media mogul Ru ...
and Telstra created the rival
Foxtel
NXE Australia Pty Ltd, trading as the Foxtel Group, is an Australian pay television company that operates cable television, direct-broadcast satellite, direct broadcast satellite television, and IPTV streaming services. It was formed in April ...
consortium.
Telstra's local phone network did not have the capability to deliver Foxtel pay television to consumers in the early 1990s, so Telstra identified a need to create a broadband network to support this new product.
As
Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecomm ...
and Optus could not agree on terms for a joint broadband cable roll out, they laid two competing cable networks, in addition to Telstra's existing copper network, at a combined cost estimated of over A$6bn.
Whilst Telstra focused on creating a broadband network specifically for broadcast, Optus designed their cable network to provide telephony services in addition to broadcast television.
Optus is no longer a customer of Telstra's after deciding to move the funding used to lease
Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecomm ...
's copper network into constructing their
hybrid fibre-coaxial network, the first in Australia.
Takeovers
Cable & Wireless with 24.5% stakeholder bought out
BellSouth's equal 24.5% shareholding in July 1997. The company returned to profitability in 1998 and changed its name to Cable & Wireless Optus. Government relaxation of foreign ownership restrictions paved the way for the company to be floated – with Cable and Wireless increasing its holding to 52.5%) – and listed on the
Australian Securities Exchange
Australian Securities Exchange Ltd (ASX) is an Australian public company that operates Australia's primary Exchange (organized market), securities exchange, the Australian Securities Exchange (sometimes referred to outside of Australia as, or c ...
on 17 November 1998.
During 2001,
Singtel
Singapore Telecommunications Limited, trading as Singtel, is a Singaporean telecommunications conglomerate, the country's principal fixed-line operator and one of the four major mobile network operators operating in the country.
Overview
T ...
launched a takeover bid for Cable and Wireless Optus which was ultimately successful and the company became known as Singtel Optus.
In May 2004, Optus announced a $226.8 million bid for UEComm. The takeover was approved in July and completed in August.
In July 2005, Optus announced it would acquire Alphawest Ltd. for A$25.9 million. The buyout was completed in November 2005 and Alphawest is now an operating division of Optus Business.
On 12 January 2006, Optus acquired the remaining 74.15% of Virgin Mobile Australia for U$22.6 m, giving it 100% ownership.
OptusNet
Optus Communications offered its first business-focused internet products in 1998 under the OptusNet product family, offering in-house developed dial-up and high-speed services. Optus purchased one of Australia's pioneer ISPs, Microplex, in 1998 to provide consumer dial-up internet services. Separate to this, under the Optus Vision brand, a
cable broadband arm began as a joint venture with U.S. cable and content provider
Excite@Home and was known as Optus@Home from its introduction in 1999 until it was renamed in 2002.
ADSL
Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over Copper wire, copper telephone lines than a conventional voiceband modem ...
services were offered from February 2004.
ADSL2+ services were provided from December 2005.
OPEL Networks
In June 2007, joint venture subsidiary
OPEL Networks was awarded government funding towards the cost of building a regional broadband network. Optus was to be contracted to build the network on behalf of OPEL.
In April 2008, after a change of the Federal Government from the
Liberal Party of Australia
The Liberal Party of Australia (LP) is the prominent centre-right political party in Australia. It is considered one of the two major parties in Australian politics, the other being the Australian Labor Party (ALP). The Liberal Party was fo ...
coalition to the
Australian Labor Party
The Australian Labor Party (ALP), also known as the Labor Party or simply Labor, is the major Centre-left politics, centre-left List of political parties in Australia, political party in Australia and one of two Major party, major parties in Po ...
, the new government terminated the funding agreement and the project was halted, with its functions to be replaced by the
National Broadband Network.
Terria
Optus is part of a consortium – now known as
Terria – that in July 2006 announced their intention to make a combined bid to build the proposed
National Broadband Network.
Outsourcing
Since 2005, Optus has
outsourced some
customer service
Customer service is the assistance and advice provided by a company to those who buy or use its products or services, either in person or remotely. Customer service is often practiced in a way that reflects the strategies and values of a firm, and ...
functions to
Concentrix
Concentrix Corporation is an American business process outsourcing company headquartered in Newark, California. It was a subsidiary of SYNNEX Corporation (NYSE: SNX) since 2006 and went public as an independent company on December 1, 2020 ...
and 247.ai, with the outsourcer providing 800 staff operating
offshore in India, supplementing Optus' 3,000-plus onshore
call centre
A call centre ( Commonwealth spelling) or call center ( American spelling; see spelling differences) is a managed capability that can be centralised or remote that is used for receiving or transmitting a large volume of enquiries by telephone ...
staff. Some functions have also been supplemented in the Philippines. Optus also uses 24/7 Inc. for telephone & chat based offshore support.
In October 2006, Optus announced that it would outsource 100 contracting jobs to another
Singtel
Singapore Telecommunications Limited, trading as Singtel, is a Singaporean telecommunications conglomerate, the country's principal fixed-line operator and one of the four major mobile network operators operating in the country.
Overview
T ...
subsidiary, IT company
NCS, in Singapore.
Infrastructure
Optus' fully owned network infrastructure consists of the following:
Network backbone
* ExtraTerrestrial
Fibre Optic Network
** Cairns to Brisbane
** Brisbane to Sydney (
fully diverse over two physically separate paths)
** Sydney to Melbourne (fully diverse over two physically separate paths, one via
Canberra
Canberra ( ; ) is the capital city of Australia. Founded following the Federation of Australia, federation of the colonies of Australia as the seat of government for the new nation, it is Australia's list of cities in Australia, largest in ...
, one via the coast)
** Melbourne to
Adelaide
Adelaide ( , ; ) is the list of Australian capital cities, capital and most populous city of South Australia, as well as the list of cities in Australia by population, fifth-most populous city in Australia. The name "Adelaide" may refer to ei ...
** Adelaide to
Perth
Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The ...
*
SDH Digital Microwave
**
Hobart
Hobart ( ) is the capital and most populous city of the island state of Tasmania, Australia. Located in Tasmania's south-east on the estuary of the River Derwent, it is the southernmost capital city in Australia. Despite containing nearly hal ...
to
Launceston
*
Satellite
A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation ( GPS), broadcasting, scient ...
** Fleet of
geostationary satellites (See
Optus fleet of satellites)
** International Earth Stations in Sydney and Perth
** National Earth Stations in Brisbane, Canberra, Melbourne, Adelaide, Perth, Hobart and
Darwin
* Regional
exchanges in Sydney (Rosebery), Melbourne, Brisbane, Canberra, Adelaide and Perth.
* Telehousing Data Centres in Melbourne and Sydney
Customer access network
*
Hybrid fibre-coaxial (HFC) network in Sydney, Brisbane and Melbourne, providing consumer
fixed telephony,
cable internet
In telecommunications, cable Internet access, shortened to cable Internet, is a form of broadband internet access which uses the same infrastructure as cable television. Like digital subscriber line (DSL) and fiber to the premises, cable Internet ...
and
cable television
Cable television is a system of delivering television programming to consumers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fibre-optic cables. This contrasts with bro ...
services.
* CBD optical fibre rings in Sydney, Melbourne, Brisbane, Adelaide, Perth, Canberra and
Wollongong
Wollongong ( ; Dharawal: ''Woolyungah'') is a city located in the Illawarra region of New South Wales, Australia. The name is believed to originate from the Dharawal language, meaning either 'five islands/clouds', 'ground near water' or 'sound ...
, providing direct access for corporate and government services.
*
DSLAMs in certain
Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecomm ...
local telephone exchanges in all states. Originally only providing business-grade
DSL
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric di ...
services, newer installations also provide consumer
DSL
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric di ...
and
POTS telephony.
OptusNet also provides
Cable
Cable may refer to:
Mechanical
* Nautical cable, an assembly of three or more ropes woven against the weave of the ropes, rendering it virtually waterproof
* Wire rope, a type of rope that consists of several strands of metal wire laid into a hel ...
internet. In August 2010, OptusNet released an upgrade of its HFC network to the
DOCSIS 3.0 standard, which enabled customers to access a maximum theoretical downstream bandwidth of 100
Megabits. OptusNet is also one of the few ISPs in Australia to currently provide
ADSL2+ via its own
DSLAMs, which it also resells to other ISPs.
Mobile network
Mobile network equipment is from Nortel, Nokia and Huawei and antennas are sourced from Andrews, RFS, Argus and Kathrein.
The Optus network operates on the following bandwidth frequencies across Australia:
*
3G UMTS
The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. UMTS uses Wideband Code Division Multiple Access, wideband code-division multiple access (W-CDMA) radio access technolog ...
900/2100 MHz
*
4G LTE 700 / 900 / 1800 / 2100 / 2300 / 2600 MHz network which has been in progressive rollout since 2012.
VoLTE is currently being rolled out across Australia. For now,
VoLTE is only available in CBD and metro areas in
Sydney
Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...
,
Melbourne
Melbourne ( , ; Boonwurrung language, Boonwurrung/ or ) is the List of Australian capital cities, capital and List of cities in Australia by population, most populous city of the States and territories of Australia, Australian state of Victori ...
, Adelaide, Brisbane, Perth and Canberra on selected devices purchased on postpaid contracts. Until VoLTE has been fully rolled out, voice calling is still reliant on the 3G network (and formerly the 2G network until it was terminated).
*
5G NR 3500 MHz rollout started in October 2019
The
2G GSM
The Global System for Mobile Communications (GSM) is a family of standards to describe the protocols for second-generation (2G) digital cellular networks, as used by mobile devices such as mobile phones and Mobile broadband modem, mobile broadba ...
900/1800 MHz network was terminated on 3 April 2017 in
Western Australia
Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...
and
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regi ...
.
2G GSM was completely terminated on 1 August 2017 when 2G was disconnected in
Victoria,
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...
,
Australian Capital Territory
The Australian Capital Territory (ACT), known as the Federal Capital Territory until 1938, is an internal States and territories of Australia, territory of Australia. Canberra, the capital city of Australia, is situated within the territory, an ...
,
Queensland
Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...
,
Tasmania
Tasmania (; palawa kani: ''Lutruwita'') is an island States and territories of Australia, state of Australia. It is located to the south of the Mainland Australia, Australian mainland, and is separated from it by the Bass Strait. The sta ...
and
South Australia
South Australia (commonly abbreviated as SA) is a States and territories of Australia, state in the southern central part of Australia. With a total land area of , it is the fourth-largest of Australia's states and territories by area, which in ...
. To remain connected, a device that is capable of running 3G at 900 MHz is now required after 2G was completely disconnected across Australia.
On 28 October 2024, the 3G UMTS service provided by Optus was shut down. This affects other providers reliant on their network, including
Amaysim and
Virgin Mobile Australia. To remain connected, customers are required to have a phone capable of connecting to their 4G LTE or 5G NR services. All phones incapable of using VoLTE will be prevented from accessing the Optus network due to legal requirements to ensure access to
emergency 000 calls.
Partly owned infrastructure
Part-owned network infrastructure includes:
*
3G mobile network, a joint venture with
Vodafone Australia
*
Southern Cross Cable, a
fully diverse submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
optical fibre link across the
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
between Sydney,
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...
and
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
in the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
. The Singtel group owns a 40% interest in Southern Cross Cables Limited. This interest was originally owned by Singtel Optus Pty Limited, before ownership was transferred to parent company Singtel during the March 2006 – June 2006 quarter.
Advertising and sponsorship

Between 1994 and 2005 Optus had the naming rights to the Carlton football clubs original home ground in Princes Park. It was called Optus Oval until the ground was retired by the AFL in 2005.
Optus was the main sponsor of the
1997 ARL season.
In 2016, Optus signed a 10-year partnership agreement with the
Australian Olympic Committee
The Australian Olympic Committee (AOC) is the National Olympic Committee responsible for developing, promoting, and protecting the Olympic Movement in Australia. The AOC has the exclusive responsibility for the representation of Australia at ...
to be the official partner of the Australian Olympic Team and the Australian Paralympic Team until 2026.
In 2017, Optus won naming rights to
Perth Stadium where it would be known as Optus Stadium. Optus and the
Government of Western Australia
The Government of Western Australia is the States and territories of Australia, Australian state democratic administrative authority of Western Australia. It is also commonly referred to as the WA Government or the Western Australian Governmen ...
agreed to a 10-year naming right worth approximately A$50 million.
Optus also has a long-term partnership with the
Adelaide Crows in the
AFL. Optus has been a partner of the
Collingwood Magpies in the
AFL Women's
AFL Women's (AFLW) is Australia's national semi-professional Australian rules football in Australia, Australian rules football competition for women's Australian rules football, female players. The 2017 AFL Women's season, first season of the l ...
since 2018.
Optus is the current major sponsor for the No. 25
Walkinshaw Andretti United Holden ZB Commodore driven by
Chaz Mostert
Awards
Incidents
2022 cyberattack
Around 22 September 2022, Optus systems sustained a significant
cyberattack
A cyberattack (or cyber attack) occurs when there is an unauthorized action against computer infrastructure that compromises the confidentiality, integrity, or availability of its content.
The rising dependence on increasingly complex and inte ...
that resulted in a major data breach of both current and former customers' personal information, including customers’ names, dates of birth, phone numbers and email addresses, with a smaller subset of customers having their street addresses, driving licence details and passport numbers leaked. Optus CEO Kelly Bayer Rosmarin urged customers to exercise "heightened awareness" regarding transactions with their Optus and other accounts. Rosmarin emphasised that passwords were not compromised. The CEO said that the "worst-case scenario" regarding the number of customers whose data had been leaked was 9.8 million customers, but believes the actual number to be far lower.
On 24 September 2022, Australian news outlets ''
The Age
''The Age'' is a daily newspaper in Melbourne, Australia, that has been published since 1854. Owned and published by Nine Entertainment, ''The Age'' primarily serves Victoria (Australia), Victoria, but copies also sell in Tasmania, the Austral ...
'' and ''
The Sydney Morning Herald
''The Sydney Morning Herald'' (''SMH'') is a daily Tabloid (newspaper format), tabloid newspaper published in Sydney, Australia, and owned by Nine Entertainment. Founded in 1831 as the ''Sydney Herald'', the ''Herald'' is the oldest continuous ...
'' reported that Optus was investigating the authenticity of a ransom demand of US$1 million made on a hacking forum. The demand gave Optus one week to pay the ransom in cryptocurrency else the data will be sold for US$300,000 to whoever else wants it.
On 6 October, the
Australian Federal Police
The Australian Federal Police (AFP) is the principal Federal police, federal law enforcement agency of the Australian Government responsible for investigating Crime in Australia, crime and protecting the national security of the Commonwealth ...
announced the arrest of a 19-year-old man who had allegedly threatened 93 Optus customers by saying that he would use their information leaked in the attack to commit financial crimes, unless they paid AUD $2,000.
In response to the cyberattack, the
Australian federal government announced emergency regulation on 6 October, in the form of a 12-month amendment to the ''Telecommunications Regulations 2021'' to "enable telecommunications companies to temporarily share approved government identifier information with regulated financial services entities."
On 11 October, the Office of the Australian Information Commissioner launched an investigation, the aim of which is to explore the company's handling of customers' data.
2023 nationwide outage
Early on 8 November 2023, an undetermined issue caused a nationwide outage in Optus Mobile and Fixed Internet services. The outage directly impacted more than 10 million customers, including government services, hospitals and businesses. Optus Mobile customers reported that their phones showed 'SOS' on the signal indicator, which is a sign the regular network is down, but mobile phones still have access to alternate networks in the event of an emergency call by using a so-called camping mechanism; however, Optus landlines were unable to make emergency
triple-zero calls. The outage affected the communication systems for Melbourne's train network, so for safety reasons the whole network was halted until backup communications commenced, leading to major delays and cancellations throughout the day.
See also
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Internet in Australia
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National Broadband Network
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Telecommunications in Australia
References
External links
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Photos: Optus's new home(
ZDNet Australia)
{{Authority control
Australian companies established in 1981
Companies based in Sydney
Telecommunications companies established in 1981
Australian brands
Internet service providers of Australia
Mobile phone companies of Australia
Satellite operators
Temasek Holdings
Telecommunications companies of Australia
Australian subsidiaries of foreign companies
1998 initial public offerings
2001 mergers and acquisitions
Former Commonwealth Government-owned companies of Australia