... currently staying and has access to the network. There, the samecommunication services can be used as at home, limited only by the properties of the1 GSM Switching, Services and Protocols: Second ... characteristics and the cellular principle. The understanding of duplex and multi-ple access schemes serves as the basis for understanding GSM technology. Chapter 3introduces the GSM system architecture and ... Hong Kong, and New Zealand. Afterward, GSM has also been introduced in Brunei, Cameroon, Iran, South Africa, Syria, Thailand, USA and United Arab Emirates. Whereas the majority of the GSM networks...