This technical report documents the use of the Integrated Services Digital Network (ISDN) User Part (ISUP) Screening Indicator, as deployed in today's network, for conveying Caller ID Authentication information. The Technical Report (TR) assesses the reliability of the information conveyed in the ISUP Screening Indicator and identifies limitations based on current standards and regulations. In addition, the TR documents the changes required to standards, particularly ATIS-1000679, to increase the viability of using the ISUP Screening Indicator.
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ATIS 0417001-004
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