The second volume of Bernhard Walke's comprehensive presentation of mobile communication networks and their protocols is dedicated to non-publicly used bundle radio systems and radio-based supplementary networks. It also includes an overview of cordless telephone systems, satellite communication, and UPT, the Universal Personal Telecommunications system, as well as a chapter on PHS, the Japanese cordless telephony system. An important focus of the content addresses wireless LANs with the HIPERLAN/1 standard and contributions to the new standards HIPERLAN/2 and IEEE 802.11.