4. Telephonic communications
  5. Audio message storage, retrieval, or synthesis
  6. Interaction with an external nontelephone network

ITXC Inc.

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Method and apparatus for establishing a collect call...

Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate

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Method and apparatus for establishing a voice call to a PSTN...

Telephonic communications – Audio message storage – retrieval – or synthesis – Multimedia system
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Method and apparatus for selecting an internet/PSTN...

Telephonic communications – Audio message storage – retrieval – or synthesis – Interaction with an external nontelephone network
Reexamination Certificate

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Virtual calling card with arbitrary controls

Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
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