noun
telex
Rare term for telex, a now-obsolete teleprinter network. Cross-referenced with テレックス, which is the common modern term.
See also: テレックス
加入電信は、かつて国際的なメッセージ送信に使われた。
Telex was once used for international message transmission.
テレックス is the common modern loanword for telex, while 加入電信 is a rare native Japanese term.
Compound of 加入 (subscription, joining) and 電信 (telegraph, telecommunications). The exact historical derivation is uncertain; it appears to be a coined term for the telex service.