cable news: the development of submarine cables-非凡电子娱乐

in 1850 the british channel was the world's first submarine cable laying,

because there is no armored protection, second days was damaged by external forces.

in 1851, the use of armored cable.

since then many countries have a lot of short distance submarine cable laying.

long distance submarine telegraph cable laid across the atlantic in 1865,

second years opened. these early only one wire cable,

with maleic rubber as an insulator, the sea water constitutes a circuit, can only send low speed telegraph,

telegraph waterline. during the first world war,

most of these submarine destroyed.

in 1956 the coaxial submarine successfully laying in canada and the uk,

can open 48 way carrier telephone. now，

cable and satellite communication has become the main means of intercontinental communication.

in china，

1871 (ten years of tongzhi) danish great northern telegraph co

from vladivostok to shanghai by japan nagasaki laying a telegram for submarine cable.

the submarine cables extending southward from shanghai via xiamen to hongkong.

in 1883 and 1884 the british cable company has from shanghai

to fuzhou and from fuzhou to hongkong laying submarine cable.

these cables were destroyed during the pacific war.

october 1976,

china and japan have built a sino japanese submarine coaxial cable between shanghai and xiongben,

a total length of 875.2 km, can be opened in 480 words road.

july 1979,

yilan province and okinawa, japan, between the laying of the road can be opened 480 submarine coaxial cable,

total length of 675 km. between philippines and luzon in 1980 in taiwan county of yilan province in the laying of a submarine cable,

total length of 1020 km.

in 1981 between taiwan province and the united states of guam for a total length of 3080 km can be opened 680 channel cable.

in addition, between the main island of china coastal or between the island and the land is also a lot of submarine cable laying,

short distance carrier telephone