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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Recall supplementary service. Original standard BS ISO IEC 15052-1997 (2000) 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 interception additional network feature. Original standard BS ISO IEC 15053-1997 (1999) 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 - Message waiting indication supplementary service. Original standard BS ISO IEC 15505-1997 (1999) 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 - Message waiting indication supplementary service. Original standard BS ISO IEC 15506-1997 (1999) 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 - PINX clock synchronization. Original standard BS ISO IEC 15507-1997 (1999) in PDF full version. Additional info + preview on request
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Information technology. Telecommunications and information exchange between systems. Broadband private integrated services network. Inter-exchange signalling protocol. Transit counter additional network feature. Original standard BS ISO IEC 15773-1998 in PDF full version. Additional info + preview on request
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