4. Telephonic communications
  5. Centralized switching system
  6. Switching controlled in response to called station...

Kathleen C. Whildin

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Call waiting deluxe feature

Telephonic communications – Special services – Reserved call
Patent

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Intraswitch transition to new line support equipment

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Private branch exchange networks

Telephonic communications – Plural exchange network or interconnection – Multi-pbx interconnection
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Profile ID: LFUS-PAI-P-175272

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