4. Telephonic communications
  5. Plural exchange network or interconnection
  6. With interexchange network routing

Kenichi Hikawa

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Communications device entry method and apparatus

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent

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Incoming call controller for preferentially connecting a waiting

Telephonic communications – Centralized switching system – Call distribution to operator
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Profile ID: LFUS-PAI-P-1975565

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