ETSI EN 301 217-4
ETSI EN 301 217-4
V interfaces at the digital Service Node (SN); Interfaces at the VB5.2 reference point for the support of broadband or combined narrowband and broadband Access Networks (ANs); Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
standard published 01/01/2001 by European Telecommunications Standards Institute