DIN EN 301259-2000 专用综合业务网(PISN).内部交换信令协议.专用综合网络交换(PINX)/时钟同步
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private Integrated Network eXchange (PINX) clock synchronization (ISO/IEC 15507 (1997), modified) (Endorsement of the English version EN 301259 V 1.1.1 (1998-10) as German s