TRANSPAC or Trans-pacific cable (TPC) is a series of undersea cables under the Pacific Ocean.
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TRANSPAC-1 (TPC-1) was opened in 1964. It connected Hawaii, Guam, Japan, The Philippines, Hong Kong and Vietnam. It had a capacity of 142 channels. TRANSPAC-1 was part of the network that supported the Apollo 11 moon landing mission in 1969.[1]
In 1975, Transpac-2 (TPC-2) connected Guam, Taiwan, Korea, Hong Kong and Singapore with 845 channels.
Transpac 3 (TPC-3), which went into service April 18, 1989[2], increased capacity to 3780 channels.[3]
The TPC-5CN cable network is a 25,000 km fiberoptic ring, carrying 5 Gb/s in each channel.
| 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)[4] |
| 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.2,958Km) |