無む線せん通つう信しん

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Meanings

1

noun

radio communication

General term for communication using radio waves, including voice, data, and telegraphy.

nothingness, none, ain't

線line, track

通traffic, pass through, avenue

信faith, truth, fidelity

無む線せん
無線 means 'wireless' or 'radio' in a broader sense, while 無線通信 specifically refers to the act or system of radio communication.
通つう信しん
通信 is a general term for communication or correspondence, not limited to wireless methods.

Compound of 無線 (musen, 'wireless') and 通信 (tsūshin, 'communication').