4. Telephonic communications
  5. With usage measurement
  6. Call charge metering or monitoring

Lee C. Seydel

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Calling card validation system and method therefor

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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SS7 gateway

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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SS7 gateway

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent

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System and method of validating special service calls having dif

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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