4. Telephonic communications
  5. Centralized switching system
  6. Structure of equipment
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Device and method for expanding legacy switches

Telephonic communications – Centralized switching system – Structure of equipment
Reexamination Certificate

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Digital clocking synchronizing mechanism

Telephonic communications – Centralized switching system – Structure of equipment
Reexamination Certificate

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Digital signal cross-connect panel

Telephonic communications – Centralized switching system – Structure of equipment
Patent

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Digital system connect frame

Telephonic communications – Centralized switching system – Structure of equipment
Patent

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Digital system connect frame

Telephonic communications – Centralized switching system – Structure of equipment
Patent

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Distributing frame for telecommunications circuits

Telephonic communications – Centralized switching system – Structure of equipment
Patent

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Distribution frame board

Telephonic communications – Centralized switching system – Structure of equipment
Patent

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Drain ground for telephone connector blocks

Telephonic communications – Centralized switching system – Structure of equipment
Patent

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Drive and positioning method and system for automated switch...

Telephonic communications – Centralized switching system – Structure of equipment
Reexamination Certificate

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