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ISDN User Part

abbr., IT ISDN-UP
IT, abbr. ISDN-UP (ISDN, GSM, Mobile-Systems); ISDNUP (ISDN, GSM, Mobile-Systems)
telecom., abbr. ISUP (SS7)
ISDN user part
comp., abbr. ISUP
ISDN User Part
: 4 phrases in 2 subjects
Information technology3
Telecommunications1

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