DIN ETS 300804-2 : 1998 Title: Private Integrated Services Network (PISN) - Inter-exchange signalling protocol, Circuit mode basic services, Data Link Layer (DLL) - Part 2: Abstract Test Suite (ATS) specification; English version ETS 300804-2:1998 Year: 1998 Publisher: DIN Media GmbH Availability: Within 1-2 working days