4. Telephonic communications
  5. Special services
  6. Call diversion

Chaoxin Charles Qiu

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Call tones in communication networks

Telephonic communications – Plural exchange network or interconnection
Reexamination Certificate

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Continuity testing in communication networks

Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate

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Continuity testing with call tone messaging in communication...

Telephonic communications – Centralized switching system
Reexamination Certificate

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Methods and apparatus to limit ring trees in voice over...

Telephonic communications – Special services – Call diversion
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2197563

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