cable code; Morse cable code
Historical term for a telegraphic code used in submarine cable communications, specifically a variant of Morse code adapted for cable transmission.
The cable code is a historical coding system used in submarine cable communications.
Morse code in general; 現波符号 is a specific adaptation for cable use.
Compound of 現波 (genpa, 'current wave', referring to electrical signals) and 符号 (fugō, 'code'). The exact historical derivation is uncertain, but the term reflects its use in early telegraphy.