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Telecommunication system with improved area codes

Telephonic communications – Plural exchange network or interconnection – Routing parameter
Reexamination Certificate

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Telecommunications call-processing arrangement

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

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Telecommunications database accessing method

Telephonic communications – Plural exchange network or interconnection – Connection call model
Patent

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Telecommunications intelligent network

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

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

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Telecommunications network

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

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

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Telecommunications network architecture enabling local...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Telecommunications network architecture with rapid restoration

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Telecommunications network for serving users from two switches

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Telecommunications network system and method

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Telecommunications network system and method

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

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Telecommunications network system and method

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Telecommunications network system and method

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Telecommunications network system and method

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Telecommunications network with relocateability of subscriber nu

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

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Telecommunications resource connection and operation using a...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Telecommunications resource connection and operation using a...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Telecommunications service control point with code blocking

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Telecommunications service control point with code blocking

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