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Virtual end office in a switched telephone network

Telephonic communications – Plural exchange network or interconnection
Reexamination Certificate

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Virtual inter-machine trunking feature for communication network

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent

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Virtual private communications network

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Virtual private line connection system and method

Telephonic communications – Plural exchange network or interconnection – Multi-pbx interconnection
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 private network system and method using voice over...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Virtual signaling network method

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

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Virtual telephone extension

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Virtual terminal control device for switching system

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Virtual wide area centrex

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent

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Virtual work environment for remote users

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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VoIP adapter, IP network device and method for performing...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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VoIP call routing

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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