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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Transfer supplementary service. Original standard ISO IEC 13869-2003 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Completion supplementary services. Original standard ISO IEC 13870-2003 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private telecommunications networks - Digital channel aggregation. Original standard ISO IEC 13871-1995 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Call Diversion supplementary services. Original standard ISO IEC 13872-2003 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Diversion supplementary services. Original standard ISO IEC 13873-2003 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Path Replacement additional network feature. Original standard ISO IEC 13874-2003 in PDF full version. Additional info + preview on request

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