cable (n.) Look up cable at Dictionary.com
c. 1200, "large, strong rope or chain used on a ship," from Old North French cable, from Medieval Latin capulum "lasso, rope, halter for cattle," from Latin capere "to take, seize," from PIE root *kap- "to grasp."

Technically, in nautical use, a rope 10 or more inches around, to hold the ship when at anchor; in non-nautical use, a rope of wire (not hemp or fiber). Given a new range of senses in 19c. in telegraphy (1850s), traction-railroads (1880s), etc. Meaning "message received by telegraphic cable" is from 1883, short for cable message (1877), cablegram (1868). Cable television first attested 1963; shortened form cable in this sense is from 1970.
cable (v.) Look up cable at Dictionary.com
c. 1500, "to tie up with cables," from cable (n.). As "to transmit by telegraph cable," 1871, American English. Related: Cabled; cabling.