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Universal PBX interface

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent

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Universal PBX interface

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent

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User interaction procedure

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent

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Virtual private communications network

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Reexamination Certificate

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Virtual private network connecting system

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent

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Virtual signaling network method

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent

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Virtual terminal control device for switching system

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Reexamination Certificate

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VoIP call routing

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Wide area centrex toll service with novel translation

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Patent

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