ETSI EN 301 141-7
ETSI EN 301 141-7
Integrated Services Digital Network (ISDN); Narrowband Multi-service Delivery System (NMDS); Part 7: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) specification for the PSTN NMDS interface Layer 3 (NTN side)
standard published 02/01/2002 by European Telecommunications Standards Institute
