DIN ETS 300685 : 1997 Title: Broadband Integrated Services Digital Network (B-ISDN) - Usage of cause and location in Digital Subscriber Signalling System No. two (DSS2) and Signalling System No. 7 B-ISDN User Part (B-ISUP) (ITU-T Recommendation Q.2610 (1995), modified); English version ETS 300685:1997 Year: 1997 Publisher: DIN Media GmbH Availability: Within 1-2 working days