PN EN 300 093-4:2005现行
Integrated Services Digital Network (Isdn) - Digital Subscriber Signalling System No. One (Dss1) Protocol - Calling Line Identification Restriction (Clir) Supplementary Service - Part 4: Abstract Test Suite (Ats) And Partial Protocol Implementation Extra Information For Testing (Pixit) Proforma Specification For The User
出版：Polish Committee for Standardization
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