4. Multiplex communications
  5. Fault recovery

Antim Shah

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Abbreviated dialing between PBX and Centrex systems using a...

Telephonic communications – Plural exchange network or interconnection – Multi-pbx interconnection
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Centralized call processing

Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
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Echo path change detection using dual sparse filtering

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
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Identification of calling devices dialing a universal number...

Telephonic communications – With usage measurement – Call charge metering or monitoring
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Method and apparatus for enabling service indicators in a...

Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
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Profile ID: LFUS-PAI-P-2188703

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