ETSI PRETS 300 771-4

Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. Two (DSS2) Protocol; B-ISDN User-Network Interface Layer 3 Specification for Point-to-Multipoint Call/Bearer Control; Part 4: Abstract Test Suite (ATS) and Partial Protocol Implementation eXtra Information for Testing (PIXIT) Proforma Specification for the User