4. Telephonic communications
  5. Supervisory or control line signaling
  6. Signal reception at substation

Yuzuru Tsunoda

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Current supply circuit

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Subscriber's line closing circuit

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
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Profile ID: LFUS-PAI-P-1462237

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