DIN EN 301816-4:2002
Broadband Integrated Services Digital Network (B-ISDN)、AAL Type 2 Signaling Protocol、Capability Group 1. Part 4: Abstract Test Sequence (ATS) and Additional Information for Protocol Implementation for Partial Testing (PIXIT) 正式仕様 (英語版はこの EN を承認) 301816-4 V 1.1.2 (2002-04) ドイツ標準)