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WO03009550A2
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Method and apparatus for establishing a call through a packet based network
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Method and apparatus for establishing a collect call originated through a packet based network
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Virtual calling card with arbitrary controls
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Method and apparatus for establishing and facilitating a voice call connection from a client computer to a PSTN extension
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Credit based telephony service facilitation
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Method and apparatus for facilitating tiered collaboration
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|
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Method and apparatus for synchronizing information browsing among multiple systems
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US6304637B1
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Method and apparatus for establishing and facilitating a direct quality voice call to a telephone extension on behalf of a client computer
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