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Standard [CURRENT]

OENORM EN 301134 V 1.1.1:1999-01-01

Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Service description

Publication date
1999-01-01
Original language
English
Pages
23

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Publication date
1999-01-01
Original language
English
Pages
23

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