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Standard [CURRENT]

OENORM EN 300064-1 V 1.3.4:1998-09-01

Integrated Services Digital Network (ISDN) - Direct Dialling In (DDI) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification

Publication date
1998-09-01
Original language
English
Pages
14

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Publication date
1998-09-01
Original language
English
Pages
14

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