Lectures
Introduction: Web version, PDF-version
PSTN I/II: Web version, PDF-version
PSTN II/II: Web version, PDF-version
ISDN: PDF-version
DECT: PDF-version
PHD/SDH-case: PDF-version
ATM: PDF-version
X.25 & Frame Relay: PDF-version
Transmission Media: PDF-version
GSM: PDF-version
http://www.comsoc.org/pubs/surveys/3q99issue/bettstetter.html
UMTS: PDF-version
SS7: PDF-version