PTAT-1

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title: "PTAT-1" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["transatlantic-communications-cables", "infrastructure-completed-in-1989", "united-kingdom–united-states-relations", "ireland–united-kingdom-relations", "ireland–united-states-relations", "1989-establishments-in-new-jersey", "1989-establishments-in-bermuda", "1989-establishments-in-ireland", "1989-establishments-in-england"] description: "1989 fiber optic telecommunications cable" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/PTAT-1" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary 1989 fiber optic telecommunications cable ::

PTAT-1 was the first privately financed transatlantic fiber optic telecommunications cable. Completed in 1989 at a cost of US$600 million and maintained by Cable & Wireless (C&W) and Sprint/Private TransAtlantic Telecommunication Systems, Inc. (PSI, Inc.), it connected Manasquan, New Jersey, United States, with Devonshire, Bermuda, and Ballinspittle, Republic of Ireland, terminating at Brean, England, United Kingdom, for a distance of 7552 km.

PTAT-1 is notable for breaking the international telecommunication monopoly held by AT&T Corporation and British Telecom (BT) for telecommunications between the US and UK, and setting off the mass production of fiber optic systems that now circle the world.

PTAT-1 was built by a joint venture of a small private US company, Private TransAtlantic Telecommunication Systems, Inc. (PSI, Inc., founded as Tel-Optik in 1984) and Cable & Wireless plc of the UK. The submarine cable system and line terminal equipment were provided by Standard Telephones and Cables (STC)https://collection.sciencemuseumgroup.org.uk/people/cp33741/standard-telephones-and-cables-plc, and alarm and control system management by International Computers Limited (ICL). The US shore end was built by Lightwave Spectrum. On August 15th, 1989, US Sprint Corp. acquired 100% of PSI, Inc., and thereby acquired 50% interest in PTAT-1.

The UK to US section of the cable was shut down just after 02:00 hours on 8 February 2004, as it was no longer considered financially viable by Cable & Wireless. Competitors to the cable had dropped their prices drastically after they re-emerged from Chapter 11 Bankruptcy with little or no debts to service, something C&W was unable to compete with.

This cable provided intelligent repeaters that monitored and reported bit errors when queried by a base station. It included three fiber pairs, supporting two active channels. Each repeater had a base-station-controlled switch that could direct traffic between two fiber pairs, allowing flexible connections and a backup path if needed.

References

References

1. Sims, Calvin. (1989-03-10). "U.S. Sprint in Atlantic Cable Deal". The New York Times.
2. "Sprint Nextel Corp Annual Report -- 1989 - ProQuest".
3. Oates, John. (June 2, 2004). "Cable & Wireless is not 'down and out'".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::