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� Home : ITU-T : Publications : Recommendations : I�Series : I.431 : I.431 (03/93)
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I.431�:�Primary rate user-network interface - Layer 1 specification �

Recommendation I.431 (03/93)

Approved in 1993-03-01

Status : In force

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PDF Document PDF (acrobat)

262246 bytes 1994-01-03 E�3950�
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309315 bytes 1994-01-03 S�3951�
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