Integrated Services Digital Network (ISDN) - Line Hunting (LH) supplementary service - Digital Subscriber Signalling System No. one (DSS1) - Part 1: Protocol specification
Integrated Services Digital Network (ISDN) - Signalling System No. 7; ISDN User Part (ISUP) version 2 for the international interface - Part 3: Calling Line Identification Presentation (CLIP) supplementary service [ITU-T Recommendation Q.731, clause 3 (1993), modified]; English version ETS 300356-3:1995
Telecommunications Management Network (TMN) - Functional specification of Customer Administration (CA) on the Operations System/Network Element (OS/NE) interface - Part 2: Multi line configurations (incl. Diskette!!!)
Integrated Services Digital Network (ISDN) - Line Hunting (LH) supplementary service - Digital Subscriber Signalling System No. one (DSS1) - Part 1: Protocol specification
