4. Telephonic communications
  5. Plural exchange network or interconnection
  6. With interexchange network routing

Nafiz E Hoque

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Automatic provisioning of a telephone line test system

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
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Enhanced E911 location information using voice over internet...

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
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IP telephone system, IP telephone apparatus and method for...

Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
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Method and apparatus for enabling international toll free...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Method and apparatus for managing missed-call lists

Telephonic communications – Reception of calling information at substation in wireline...
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