E.422�:�Observations on international outgoing telephone calls for quality of service

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E.422�:�Observations on international outgoing telephone calls for quality of service �

Recommendation E.422 (11/88)

Approved in 1988-11-25

Status : Superseded

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2007-10-19

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2007-10-19

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2007-10-19

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2007-10-19

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2007-10-19

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