The present document specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information
for Testing (PIXIT) proforma for the VPN "b" reference point of implementations conforming to the standard for the
Call Diversion supplementary service (SS-CDIV) as described in ETS 300 257 [1].
EN 301 453-1 [2] specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial PIXIT
proforma specification.