Transpac (cable system)

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TRANSPAC or Trans-pacific cable (TPC) is a series of undersea cables under the Pacific Ocean.

Transpac 1[edit]

TRANSPAC-1 (TPC-1) was laid by AT&T's cable ship C.S. Long Lines. and opened on June 19, 1964. It connected Hawaii, Midway Atoll, Wake Island, Guam, and Japan. A branch from Guam to The Philippines was completed in December 1964. This cable connected with HAW-1 to complete the telephone connection to the mainland United States.[1][2][3] It had a capacity of 142 channels. TRANSPAC-1 was part of the network that supported the Apollo 11 moon landing mission in 1969.[4]

Transpac 2[edit]

In 1975, Transpac-2 (TPC-2) connected Guam, Taiwan, Korea, Hong Kong and Singapore with 845 channels.

Transpac 3[edit]

Transpac 3 (TPC-3), which went into service April 18, 1989,[5] increased capacity to 3780 channels.[6] This was the first fiber-optic cable across the Pacific, and it replaced the two existing copper cables (Transpac 1 and Transpac2) as well as satellite circuits being used at the time. It was laid from Point Arena, California to Makaha, Hawaii, from which it goes to an undersea branching unit and splits to Chikura, Japan and Tanguisson, Guam.[5]

TPC-5CN[edit]

The TPC-5CN cable network is a 25,000 km fiberoptic ring, carrying 5 Gbit/s in each channel.

History[edit]

1975 Shore-end cable section (Guam) and shallow sea section of the No.2 Trans-Pacific Cable (TPC-2)
Shore-end cable section (Okinawa) and shallow sea section of the No.2 Trans-Pacific Cable (TPC-2)[7]
1987 Shore-end cable section (Chikura side) and shallow sea section of the No.3 Trans-Pacific Cable (TPC-3)
1988 No.3 Trans-pacific Cable (TPC-3) (Laid cable length: approx. 3,834 km)
1991 No.4 Trans-Pacific Cable (TPC-4) (Laid cable length: approx. 1,259 km)
1993 Shore-end cable section (Ninomiya side) and shallow sea section of the No.5 Trans-Pacific Cable Network(TPC-5)
1993 Shore-end cable section(Ninomjya side)of the No.5 Trans-Pacific Cable Network(TPC-5)
1994 Shore-end cable section(Miyazaki side)of the No.5 Trans-Pacific Cable Network(TPC-5)
1995 No.5 Trans-Pacific Cable Network(TPC-5) (Laid cable length: approx.2,958 km)

See also[edit]

  1. Commercial Pacific Cable Company
  2. Submarine communications cable

References[edit]

  1. ^ "AT&T Archives: C.S. Long Lines". att.com. AT&T Archives and History Center. March 21, 2011. Retrieved September 24, 2016. 
  2. ^ "Submarine Cable Networks". submarinenetworks.com. Retrieved September 24, 2016. 
  3. ^ "Milestones:TPC-1 Transpacific Cable System, 1964". ethw.org. Engineering and Technology History WIKI. Retrieved September 24, 2016. 
  4. ^ Mike Dinn. "The Manned Spaceflight Network". Retrieved September 24, 2016. 
  5. ^ a b Calvin Sims (April 18, 1989). "Fiber-Optic Calling to Japan Starts Today". New York Times. 
  6. ^ Huurdeman, Anton A. (2003). The Worldwide History of Telecommunications. Wiley-IEEE. p. 405. ISBN 0-471-20505-2. 
  7. ^ "Corporate History". Kokusai Cable Ship.