As part of my three-year apprenticeship as IT-Specialist (Fachinformatiker/Systemintegration) I had to do a final project to graduate. At the time of my last year I was working in a NOC department and decided to redesign the ISDN Remote Access Solution so that the on-call engineers can access the customer networks directly and with limited cost from home. This was prior to broadband access and IP-Sec VPNs. I was working on this project for about a week and learned a lot about user management, Routing, ISDN Technology, Firewall Configuration, Client Configuration, Unix and the day-to-day operation of a Network Operation Center.