Japan-US (Japan-US Cable Network - JUSCN or JUCN or J-US or JUS) is a submarine telecommunications cable system. Spanning in the North Pacific Ocean, it links USA with Japan.
The cable was the first high capacity trans-pacific subsea cable system using DWDM technology of 10 Gbps per wavelength. Japan - U.S. Submarine Cable System consists of four fiber pairs, each operating at 10 Gbps DWDM. With design capacity of 640 Gbit/s (4,096 STM-1's), it was equivalent to 7,741,440 simultaneous voice calls.
Its introduction made it the largest capacity cable in the Pacific Region. Initially, the system operated at 80 Gbit/s (512 STM-1's) with two lit fiber pairs, expanding to 400 Gbps (2,560 STM-1's)
The cable was laid out with a length of 21,000 km, and an initial investment of $ 1.03 billion.