@INBOOK{0850Kanbach1999, AUTHOR = {Andreas Kanbach and Andreas Körber}, TITLE = {ISDN - Die Technik; Schnittstellen - Protokolle - Dienste - Endsysteme}, YEAR = {1999}, PUBLISHER = {Hüthig}, PAGES = {549}, EDITION = {3}, ADDRESS = {Heidelberg}, NOTE = {ISBN 3-7785-2288-4} }