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DIN ETS 300335
Integrated Services Digital Network (ISDN) - Signalling system no. 7 - ISDN User Part (ISUP) version 1; Test specification; English version ETS 300335:1994
Edition
1995-01
DIN ETS 300739
Private Integrated Services Network (PISN) - Profile Standard for the connection of Radio Paging Equipment (RPE) to a PISN; English version ETS 300739:1996
Edition
1997-11
