The OSI (Open System Interconnection) reference model is the basis of modern data network design, but it underlines the public switched telephone network (PSTN) as well. This book covers roles, functions, definitions and the fundamentals that are required of entry-level personnel.
Debbra Wetteroth (Saint Louis MO) is security manager for SBC Telecom's Information Services Department. Before joining the IS group, she spent 15 years in Central Office Engineering for a major telephone company. Debbra holds seven certifications in telecom engineering.