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Apparatus and method for effecting a communication...

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Reexamination Certificate

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Apparatus and method for managing BLF information in an...

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Apparatus and method for providing switching at a telephone...

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Apparatus and method of replacing telephony cards without...

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Apparatus for communication between a telephone exchange and con

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Apparatus for electronic exchange having a general-purpose bus s

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Apparatus for receiving tone signal, apparatus for...

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Architecture for distributed control telecommunication systems

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Arrangement for initializing a CENTREX console interface circuit

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Attendant console sharing system and method in centrex

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Automated matrix for communication line connections

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Automated recovery of telecommunication network elements

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Automated ringing of an operator for directory assistance calls

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Backup apparatus against line defect and backup method against l

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Boot system for distributed digital data processing system

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Centralized service circuit deployment

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Circuit arrangement for centrally-controlled telecommunications

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Circuit arrangement for telecommunication switching systems conn

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Circuit arrangement for telecommunication switching systems, par

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
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Circuit for translating telephone numbers

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