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ETSI TS 129 164
M00005158
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ETSI TS 129 164 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Interworking between the 3GPP CS domain with BICC or ISUP as signalling protocol and external SIP-I networks (3GPP TS 29.164 version 8.1.0 Release 8)
standard by European Telecommunications Standards Institute, 06/01/2009
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