4. Telephonic communications
  5. Centralized switching system
  6. Call distribution to operator

Tatsuya Miyauchi

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Network linkage type private branch exchange system and...

Telephonic communications – Plural exchange network or interconnection – Multi-pbx interconnection
Reexamination Certificate

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Private branch exchange network system

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2611320

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