Distinctive ringing and distinctive call-waiting tones in an ISDN

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5953407
SERIAL NO

08760989

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a multi-service wireless, or wired, integrated services digital network, the type-of-call information in a call setup message may indicate the call is a voice call, a fax call or a data call. This information is used to generate a distinctive ring at the called subscriber unit, provided the called subscriber unit is not busy with another call. If the called subscriber unit is busy with a voice call, then a distinctive call waiting tone signal is generated based on the type-of-call information.

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Patent Owner(s)

  • NORTEL NETWORKS LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dowlatshahi, Shahram Kanata, CA 1 5
Sandler, Howard Martin Ottawa, CA 5 163
Zhang, Genzao Vanier, CA 17 347

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