Overseas Telecommunications Commission
The Overseas Telecommunications Commission (OTC) was established by an Act of Parliament in August 1946. It inherited facilities and resources from Amalgamated Wireless Australasia Limited (AWA) and Cable & Wireless, and was charged with responsibility for all international telecommunications services into, through and out of Australia.
On 1 February 1992 it was merged with Australia’s domestic telecommunications carrier, the Australian Telecommunications Corporation Limited (“Telecom”) to create the Australian and Overseas Telecommunications Corporation Limited (AOTC). The new organisation underwent a corporate identity review and was subsequently renamed Telstra Corporation Limited (“Telstra”).
When first established in 1946, OTC inherited facilities which had been depleted during World War II, and faced rising costs and falling profits. From this tenuous beginning, the organisation was to grow over the years to gain world standing on the international telecommunications stage.
Throughout rapid developments in undersea cable networks, global satellite systems and burgeoning digital technologies, OTC maintained a keen watch over its services to ensure continued quality. It also maintained and developed its links with maritime services, one of the initial arms of Australia’s international telecommunications network.
OTC Timeline 1946 to 1992
When first established by an Act of Parliament in 1946, Australia's international telecommunications carrier - OTC - inherited facilities which had been depleted during World War 2, and faced rising costs and falling profits. From this tenuous beginning, the organisation was to grow over the years to gain world standing on the international telecommunications stage.
OTC's history shows how, by internal restructuring, upgrading its public image, making long-term investments in technologies and networks, and becoming a major player in international cooperative efforts, it played a vital role in the provision of Australia's international communications.
Throughout rapid developments in undersea cable networks, global satellite systems and burgeoning digital technologies, OTC maintained a keen watch over its services to ensure continued quality. It also maintained and developed its links with maritime services, one of the initial arms of Australia's international telecommunications network.
August 7: OTC established by Act of Parliament The Overseas Telecommunications Act, 1946.
August 23: First Commission appointed – James Malone appointed Chief Commissioner.
October 1: OTC and AWA Ltd signed a Caretaker and Management Agreement under which AWA continued to control and operate radio services until such time as the Commission had the resources to assume full control.
October 19: JES Stevens appointed first General Manager of OTC.
February 1: OTC assumed full control of radio services from AWA Ltd.
May 28: Trials of 5-unit teletype equipment conducted on the Sydney-San Francisco RCA Multiplex.
June: Tests conducted with the RMS Orlon as part of a series of experiments on the development of circuits to handle radiotelephone traffic with small ships in local waters, and overseas vessels leaving/entering Australian ports.
July 1: Interim Management Agreement signed by OTC and Cable and Wireless Ltd. OTC assumed managerial control of the Australian international cable network but the assets remained with Cable and Wireless Ltd.
July 7: Bassendean receiving station, Western Australia, closed.
September 1: New shore end laid for Pacific Cable at Fanning Island.
November: Beam Messenger Service discontinued.
November 20: Direct Melbourne-Wellington, New Zealand, picturegram service opened.
January 25: First Wagga Weekend (OTC annual staff sports carnival).
April: OTC's first Annual Report tabled in Parliament.
May 11: First International Telecommunication Union meeting since WWII began in Brussels.
July 12: Work commenced on a new station building for Darwin Radio.
January 15: Adelaide cable station closed.
April 11: Arrangements completed for establishing a radiotelephone service between Australia and HMA ships at sea.
May 1: Assets of Cable & Wireless Ltd purchased by the Commission.
May 2: Aerogram service commenced between Australian coast radio stations and Qantas and BOAC flights on the Sydney-UK route.
May 19: International Telegraph and Telephone Conference (CCITT) began in Paris to revise international telegraph agreements.
May 31: Commonwealth Telecommunications Board formed.
December 14: OTC's first staff Christmas party held on Sydney Harbour.
February 1: Flat rates introduced for traffic to major foreign zones from Australia. Commercial rates to most foreign destinations also amended. All rates increased by 3d per word.
April 1: Ownership and control of Cable and Wireless Ltd's assets in Australia passed to OTC. All staff except those hired locally at Fanning Island and Suva became members of OTC.
May 5: Gangers arrived at Willis Island to remodel the radio station.
June 8: New transmitting station opened at Port Moresby.
June 15: Old Darwin Radio station closed. New station at Parap opened.
July 5: Worldwide unification of telegram categories became effective.
August 30: PMG's Department extended picturegram service to all Australian capital cities, transmitted via OTC's Melbourne office.
November 3: JL Mulholland appointed General Manager of OTC. New OTC logo sourced from Radio Hobbies Magazine.
March: Installation of new phototelegram equipment completed at the Melbourne office.
June 30: OTC's rates book revised to include zoning of rates to certain countries, unification of rates and abolition of Government rates to certain countries.
September 1: First Annual General Meeting held of the Sydney Office Staff Sports and Social Club.
October 1: Ships' Letter Telegram service opened to all classes of vessels.
March 26: Sydney-San Francisco circuits converted to 5-unit code.
April 15: Sydney-London telegraph traffic transferred to Electra House, Sydney. All London-Sydney traffic handled without tape relay at Melbourne.
June 9: Transfer of coastal radio operations from Applecross to Bassendean. Applecross became remote controlled.
October 20: Electra House became the single operating centre in Sydney.
June 1: Cost of all telegraph rates from Australia (excluding urgent press and press messages to USA) reduced by one third.
June 2: Radiotelegraph and cable channels rearranged to cater for heavy traffic during the coronation of Queen Elizabeth II. Two additional phototelegram channels opened. Bassendean Radio equipped with phototelegram equipment.
August 8: OTC's central workshop facilities moved from Pennant Hills to Marrickville.
November: Sydney's central telegraph operations moved to Spring Street.
December 6: Melbourne facsimile section received the first-ever picture for publication from a ship at sea (the Royal yacht Gothic en route to Fiji). December 15: First transmitter at Doonside brought into service.
January: OTC's acceptance office in Perth closed. April 2: Doonside transmitting station closed and all services diverted to Fiskville and Pennant Hills.
August 23: SF Kellock appointed new Chief Commissioner of OTC.
January 16: Cooktown Radio station closed.
February 28: Adelaide acceptance office closed.
July 9: Bringelly commenced monitoring Island Services. Transfer began of radiotelegraph channels from La Perouse to Bringelly.
October 10: Bringelly HF radio station officially opened.
April 19: Trevor A Housley appointed General Manager of OTC.
April 27: Severe solar flare activity interrupted OTC's radiotelegraph services.
August 17: Qantas leased a two-way radio teletype circuit to Singapore.
September 25: First trans-Atlantic co-axial telephone cable, TAT-1 came into service.
December: During the Melbourne Olympic Games, a record amount of traffic was sent over Australia's international telecommunications channels. 9,408,254 words were sent over 22 leased channels which operated for some 5465 hours. 6730 radiotelephone calls were handled and 2296 phototelegrams were sent. 285 hours of radio broadcasts were sent over R/T channels.
OTC adopted a new logo. February 28: Doonside transmitting station officially re-opened.
October 5: Bringelly, Rockbank and Bassendean stations began monitoring transmissions from the world's first man-made satellite, Sputnik 1, launched by USSR.
October 28: Lodgement of international telegrams via the international telex network came into operation - known as the 'printergram service'.
OTC updated its logo. January 31: USA successfully launched its first satellite - Explorer 1.
March 17: Direct radiotelephone service opened between Australia and Japan.
November: Official opening ceremonies heralded the new international telex services to Japan, USA, UK and Canada.
December: The USA launched its first delayed repeater satellite: 'Score'.
April 20: Commemorative cairn celebrating the landing of the Java-Darwin submarine telegraph cable unveiled in Darwin.
September 28: The Pacific Cable Conference hosted by OTC in Sydney was officially opened by the then Prime Minister Robert Menzies. At this meeting, plans were drawn up for the construction of a new transpacific submarine telephone cable to be known as Compac.
February 4: OTC's new Melbourne office at Lonsdale Street officially opened.
April 21: First meeting of the Pacific Cable Management Committee began in London.
August 22: Ceremony held in Paddington to mark the commencement of work on OTC's new international terminal.
August 23: MRC Stradwick appointed Chief Commissioner of OTC.
August 31: Direct Australia-New Zealand telex service opened.
November 14: Historic No 1 transmitter at Fiskville closed down.
November 15: Radioteletype and voice frequency circuit opened between Sydney and Honolulu as part of preparations for a communications system being developed for NASA's Project Mercury (America's first manned orbital flight).
January 3: A radioteletype and voice frequency circuit opened between Perth Radio and a ship in the Indian Ocean as part of preparations for NASA's Project Mercury.
July 27: Delegates from Australia, Canada, New Zealand, Singapore and Malaya, Hong Kong, Sarawak, India, Pakistan, Brunei and North Borneo met in Kuala Lumpur to discuss the construction of a proposed new telephone link between Australia and SE Asia: the Seacom cable.
September 23: Sir Giles Chippindall appointed Chief Commissioner of OTC.
November: 5-unit code equipment installed at the Cottesloe cable station.
December 12: The new trans-Atlantic telephone cable, Cantat, opened.
March: Commonwealth Telecommunications Conference began in London to discuss satellite communications.
April 19: Shore end of the Compac cable landed at Bondi Beach.
June 2: The final splice was made on the transTasman section of the Compac cable. OTC technician, Orme Cooper, made the first direct voice contact over the cable from Sydney to New Zealand.
July: Southport cable station closed.
July 9: Prime Minister Robert Menzies officially opened the trans-Tasman section of the Compac cable.
December 3: The Suva-Auckland link of the Compac cable officially opened.
December 10: Norfolk Island cable station closed at Anson Bay.
December 31: The new telephone exchange at Paddington terminal opened.
March 29: Adelaide Radio station was transferred from Rosewater to a new station at McLaren Vale.
April: New transmitting and receiving stations opened at Lae Radio.
August 23: AE Chadwick appointed Chief Commissioner of OTC.
December 3: The Compac cable was officially opened by HRH Queen Elizabeth II addressing simultaneous ceremonies in London, Ottawa, Sydney and Wellington.
New logo adopted
January 15: New Townsville Radio station was officially opened at Pallarenda.
January 16: Fanning Island cable station closed at 4.10 pm.
February: Representatives from OTC attended meetings in Rome and Tokyo to discuss investment plans for a world satellite communications network with European countries, the Japanese and the Americans.
August 20: International Telecommunications Satellite organisation (Intelsat) was formed in Washington DC OTC was one of the founding signatories to agreements setting forth interim arrangements; ensuring Australia's participation in the development of a global satellite communications system.
March 31: Singapore-Hong Kong section of the Seacom cable officially opened in Hong Kong.
April: The first Intelsat satellite, Early Bird, launched into orbit above the Atlantic.
June 28: Government officials in Europe and the US exchange greetings via Early Bird.
September: The automatic transit telex exchange opened at OTC's Paddington terminal, replacing the old manual system which had been in place since 1958.
October: Agreement reached between NASA and OTC for the provision of a satellite earth station at Carnarvon in Western Australia which would be linked with NASA's tracking station at Browns Flat and its control centre in the US.
November: NASA announced that the Intelsat satellite communications system would be used for its manned space flights to the moon. The Australian government gave its consent for the construction of a satellite earth station at Carnarvon, Western Australia.
December: Land was acquired on which to build a new radio transmitting station at Gnangara in Western Australia, which would be used to provide additional capacity for the NASA space project.
December 3: The new radio receiving centre opened at Rabaul.
January 17: Harold White took up his duties as General Manager of OTC.
February 26: Last messages were exchanged over the Cottesloe-Cocos Island-Rodriguez cable.
May 6: New Brisbane Radio station opened at Toorbul.
July 3: The new Melbourne Radio station officially opened at Cape Schanck.
July 31: Cocos Islands cable station closed. October 29: Carnarvon satellite earth station officially opened and successfully tracked the first Intelsat II satellite as it passed over Australia during its transit orbit.
November 25: First satellite television link-up between Australia and England was made possible because the first Intelsat II satellite did not reach synchronous orbit over the Pacific Ocean.
New logo adopted.
February 4: Australia's first satellite communications service opened via Carnarvon satellite earth station.
March 30: HRH Queen Elizabeth II officially opened the Seacom cable. Simultaneous ceremonies were held at Cairns, Guam, Madang, Hong Kong, Singapore and London.
April 14: OTC headquarters in Sydney moved from Spring Street to new premises at Martin Place.
April 17: Harold White, General Manager of OTC, was appointed Chairman of the newly formed Commonwealth Telecommunications Council at its inaugural meeting held in London 17-28 April.
May: New international radio station opened at Gnangara.
October: A new staff magazine, Contact, was launched.
November: Time assignment speech interpolation equipment came into operation on the Compac cable, increasing the number of circuits from 80 to 100.
Logo updated. March 29: Moree satellite earth station officially opened, followed by an international television linkup between Australia and Japan.
April 1: The first commercial use of Moree SES came on this day when news stations in Melbourne broadcast US President Lyndon Johnson's announcement that he would not stand for re-election.
July: The radio transmitting station at Applecross closed.
September 29: Sydney Operating Room moved to Martin Place.
October 1: Sir Arthur Petfield appointed Chief Commissioner of OTC.
February: OTC's automatic message relay system became operational at the Paddington terminal. Carnarvon SES began service on a part-time basis as a TTC&M station for Intelsat.
March 14: The first commercial satellite link to Asia opened between Australia and Japan.
March 31: The Commonwealth Telecommunications Board was superseded by the Commonwealth Telecommunications Organisation. May 31: The original beam wireless stations at Fiskville and Rockbank closed.
July 20: Pictures of the first man on the moon were telecast to the world via OTC facilities in Australia.
October 1: The second satellite earth station at Carnarvon became operational. Carnarvon SES 1 assumed full TT&C functions.
November 9: Australia became the first nation in the world to use satellite systems for domestic communications, when 24 voice circuits were opened between Carnarvon SES and Moree SES.
December 14: The new Ericsson gateway telephone exchange was brought into service at Paddington terminal.
December 15: Ceduna Satellite Earth Station came into service.
New logo adopted. February 20: The official opening of Ceduna SES was held at the Adelaide Hotel Adelaide.
March: OTC's year-end figures showed that the revenue from international telephone services exceeded those of international telegraph services for the first time in the Commission's history.
June 21: OTC's new office in Brisbane officially opened.
October 5: Fully automated telex system introduced onto the Australia-US service.
January 25: The first Intelsat IV satellite placed over the Atlantic.
November 20: 100th anniversary celebrations of the landing of the Java-Darwin cable held in Darwin.
February: Transit resumed as OTC's staff magazine.
February 6: The Gemini XII space capsule touring display arrived in Australia to be used for celebrating OTC's 25th anniversary.
March: Carnarvon Radio station opened.
July 15: A direct radiotelephone service opened between Norfolk Island, Australia and beyond.
February: The Australian Government established the Vernon Commission of Inquiry into the operation of Australia's postal and telecommunications services.
November 27: The new Hobart Radio station opened.
December 1: The assets and responsibilities for the operation of telecommunications services in Papua New Guinea were transferred from OTC to the PNG.
February 21: Broadway terminal officially opened by Prime Minister E Gough Whitlam.
March: Preliminary trials of air to ground radiotelephone services for Qantas conducted (concluding 1.4.74). Full-scale experimental trials began for Qantas flights over the Indian and Pacific Oceans.
November 12: Alan George Gibbs appointed Chief Commissioner of OTC.
December 25: Cyclone Tracey hit Darwin. OTC radio facilities suffered comparatively minor damage.
May: Australia's first daily international television service commenced. Legislation passed in Parliament advocating the formation of Telecom and Australia Post, and leaving OTC as a separate statutory authority. Telecom was established in July of this year.
June: Radio-teletype direct printing service established for ship-to-shore messages via Sydney Radio.
September: Robert D Somervaille appointed Chief Commissioner of OTC.
September 25: Shore end of the Tasman cable landed at Bondi Beach.
October: The world's first TASI-B (Time Assignment Speech Interpolation) equipment came into operation at OTC's Paddington terminal, effectively doubling the capacity of the Compac cable and 38 of the Seacom cable circuits.
New logo adopted. January 12: OTC launched its first colour television advertising campaign: Circles.
February: Members of the International Maritime Consultative Organisation reached agreement on the need for a worldwide maritime satellite system.
February 20: Tasman cable officially opened by Prime Minister Malcolm Fraser, speaking from Canberra to Prime Minister of New Zealand, Robert Muldoon.
March 9: New ISD (International Subscriber Dialling) service launched at a press conference at OTC's Broadway terminal, coming into commercial operation on 1 April.
July 23: A-PNG cable officially opened. November 31: Sydney Radio handled its first ever ship-to-ship telex connection between a vessel sailing in the Atlantic Ocean and one sailing in the Indian Ocean.
February: OTC became the first signatory to the Inmarsat agreement.
March 6: OTC's highly successful advertising campaign - Memories - went to air, promoting ISD.
May 19: Capacity of Broadway exchange telephone circuits increased from 2400 to 6000 circuits with the installation of new equipment.
July 18: Representatives from American, Japanese and Australian telecommunications organisations met at an international telephone conference to herald implementation of the new CCITT No 6 telephone signalling process. This process had been 15 years in the making, through international research and cooperation.
September: Marisat satellite communications terminals installed on the Australian vessels Robert Miller and the Australian Endeavour.
March 1: OTC's maritime radiotelephone service, Seaphone, launched from Melbourne Radio station.
March 13: A new operating centre at La Perouse CRS officially opened.
April 18: OTC's Midas (Multimode International Data Acquisition Service) came into commercial operation, providing Australian organisations with fast access to overseas information banks through use of advanced computer-based technology.
May 4: W T Schmidt appointed General Manager of OTC.
September: OTC's OverseasFax service came into commercial operation.
April 30: 50th anniversary of the inauguration of the Australia-UK direct telephone service.
May 14: Representatives from 10 countries, including Australia, met at OTC House to sign a document committing those nations, in principle, to start work on a new trans-Pacific cable: Anzcan.
June: The world's first optical fibre underwater telecommunications cable laid in Loch Fyne in Scotland to undergo trials.
July 24: OTC's fifth satellite earth station, Ceduna 2, officially opened.
August: OTC's successful television advertising campaign - Friends - launched. OTC was awarded a five-year contract by the European Space Agency for the installation, maintenance and operation of VHF launch support facilities at Carnarvon SES.
September 18: The Australian government expanded OTC's charter to give it interim ownership and management of Australia's national communications satellite system.
November: OTC launched its Intertel service.
April 10: The first space shuttle - Columbia launched.
April 23: Paddington terminal extensions officially opened by OTC's Chief Commissioner, RD Somervaille.
October: OTC hosted the 8th South Pacific Regional Telecommunications meeting to discuss requirements and progress of telecommunications services for South Pacific nations.
November: The Australian Government announced the formation of a national body, Aussat Pty Ltd, which would own and manage the new national satellite system.
December 20: The first maritime communications satellite - Marecs-A -launched from French Guyana. Carnarvon SES used as a TTC&M station.
February 1: Inmarsat assumed control of its international maritime satellite communications network.
April 14: OTC opened a new training centre at Marrickville.
October: The Commonwealth Games, held in Brisbane, led to a massive increase in international telecommunications traffic.
November 3: Moree 2 SES was officially opened.
December: The Sydney-Hobart became the first yacht race in the world to be monitored using satellite communications. An AWA radio vessel was equipped with an Inmarsat terminal.
January 11: Shore end of the Anzcan cable landed at Bondi Beach.
August 19: OTC launched its new Minerva data communications service.
October: OTC established its own Research and Development Board.
December 8: The new Norfolk Island cable station officially opened.
April 3: OTC hosted an International Teleconferencing Symposium at OTC House. Participants took part in a satellite link-up with other Intelsat member-nations.
May 14: Healesville Satellite Earth Station officially opened near Melbourne.
July: OTC launched its Herogram service for athletes attending the Los Angeles Olympic Games. OTC was the only foreign international telecommunications organisation to have a presence at the Games.
November 8: The Anzcan cable was officially opened by HRH Queen Elizabeth II speaking simultaneously to parties gathered at the Sydney Opera House, Auckland, Suva and Vancouver.
November 30: The Compac cable was officially decommissioned.
January: A new $6M computer system providing data processing services and detailed customer accounting was installed in OTC's Head Office.
January 8: The cable laying vessel, CS Pacific Guardian, built in England, sailed into Sydney Harbour on her maiden voyage.
February 20: George Maltby was appointed the first Managing Director of OTC.
May 31: Shore end of the AIS cable landed at Whitford Beach, near Perth.
July 23: The Intelsat Vista Earth station, installed by OTC on the Cocos Islands, opened.
November: Telex World Letter service introduced, allowing telex users to send messages to correspondents who did not own a telex machine.
July 18: The Seacom cable was taken out of service. Guam cable station closed.
October 28: The Perth International Telecommunications Centre, and the AIS cable, were officially opened in Gnangara, WA.
December 16: Prime Minister Bob Hawke launched the Request for Tenders for the Tasman 2 cable at an official function in Canberra.
January: The Coastal Radio Service was officially renamed the OTC Maritime Communications Service.
February 1: OTC celebrated its 40th anniversary of operations.
April: OTC adopted a new logo, and new corporate style.
Apri130: Carnarvon SES's TTC&M satellite dish was officially decommissioned.
June 2: Amendments to the Overseas Telecommunications Act were announced, paving the way for OTC to expand its sales of developed software and provide consultancy services on communications systems to foreign countries. OTC announced the formation of OTC International Limited as its wholly owned international marketing subsidiary.
July 1: The new Melbourne International Gateway opened at Scoresby.
July 27: The Vietnam Vista satellite earth station was officially opened.
November 11: Senator Gareth Evans officially opened the new OTC House at 231 Elizabeth Street, Sydney.
November 27: Oxford Falls (Sydney) SES officially opened. (A few days earlier, OTC held a barbecue lunch for staff involved in the project.)
December 17: A contract between OTC, Telecom New Zealand and the Tasman Cable Company was signed for the construction and laying of the Tasman 2 optical fibre cable.
January: Alan W Coates appointed Chief Commissioner of OTC.
Apri18: OTC’s Skystream service was officially opened at Sydney SES.
June 28: The international videoconferencing studio was launched at OTC House.
July 28: OTC opened its Bicentennial exhibition Settlement to Satellites - at Paddington terminal.
August: Moree SES closed.
August 8: The new AXE 900 digital telephone exchange opened at Broadway terminal.
September: OTC International's proposal for a Pacific Area Cooperative Telecommunications Network was endorsed at the South Pacific forum.
December: David M Hoare appointed Chairman of OTC, following Alan Coates' resignation. The last in a chain of four earth stations in the Antarctic was completed by OTC at Macquarie Island.
January 1: M J Hutchinson appointed acting Managing Director of OTC, following George Maltby's resignation.
April 1: OTC was incorporated and became OTC Limited.
July: SWR Burdon appointed Managing Director of OTC.
October: OTC Callcard launched. October 28 the first Intelsat IV launched and placed in orbit over the Atlantic Ocean. November: A direct Australia-UK videoconferencing service opened.
March 9: New satellite earth station opened in Hanoi.
March 29: OTC International signed its first agreement with island communities in the South Pacific to become members of the Pacific Area Cooperative Telecommunications Network.
June 6: OTC launched its Switched Digital service the first international product based on ISDN technology. The service allowed the high-speed transfer of text, data and images, high-speed facsimile and interactive video and audio.
September 10: Australian Government announced it had finalised plans for a merger between OTC and Telecom.
September 27: New Perth International Telecommunications Centre officially opened.
November 14: Senator Gareth Evans received the inaugural telephone call during the official opening ceremony of the Cambodian earth station in Phnom Penh.
December 5: A Construction and Maintenance Agreement was signed by OTC and 35 other countries in Canberra for the new A$800 million South Pacific optical fibre cable network.
January 25: Commonwealth Telecommunications Interim Board met for the first time. The Board was formed by the Federal Government to advise on the structure of the new telecommunications body which would result from the merger of Telecom and OTC.
March 6: OTC achieved the figure of 1 billion paid minutes of bothway international telephone traffic in a Single financial year.
April: The new OTC Easifax service was launched in Sydney.
June 15: The new Adelaide business office was officially opened.
November: The new $12M ISDN exchange at Paddington terminal commenced full operations.
November 12: The shore end of the Tasman 2 optical fibre cable was landed at Bondi Beach.
February 1: OTC ceased operating as a separate company when it merged with Telecom Australia to form the Australian and Overseas Telecommunications Corporation.
Information sources: OTC annual reports (Australian state and national libraries, OTC Australia Archive, Telstra Archive), OTC magazine Transit, (Australian state and national libraries, OTC Australia Archive, Telstra Archive), Overseas Telecommunications Veterans Association(OTVA).
Alper, J Rand Pelton, J N; The Intelsat Global Satellite System; the American Institute of Aeronautics and Astronautics, Inc; New York; 1984. CONTACT- in-house magazine of OTC. Masterton, R and Prances M; Invisible Bridges, Australia and International Telecommunications; the Overseas Telecommunications Commission; Australia; 1986. OTC Annual Reports. Transit - in-house magazine of OTC Australia. Unpublished notes on the history of The Overseas Telecommunications Commission - sourced from general OTC history file in OTC Australia archives.