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Remote subscriber control system of a central office digital swi

Telephonic communications – Concentrator or trunk selector – Concentrator-distributor pair
Patent

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Remote subscriber line unit provisioning system for use with...

Telephonic communications – Concentrator or trunk selector – Concentrator-distributor pair
Reexamination Certificate

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Routing call processing communications in a telecommunications s

Telephonic communications – Concentrator or trunk selector
Patent

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Routing call processing communications in a...

Telephonic communications – Concentrator or trunk selector
Reexamination Certificate

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