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Category: Networks



For many years, the technical literature on protocol architectures was dominated by discussions related to OSI and to the development of protocols and services at each layer. Throughout the 1980s, the belief was widespread...

Global System for Mobile Communications (GSM) 0

Global System for Mobile Communications (GSM)

•Designed to be a digital (wide area) wireless network. • Driven by European telecom manufacturers, operators, and standardization committees • Very widely used around the world GSM Features 1.Service portability • Mobile can be...

Cellular Digital Packet Data (CDPD) 0

Cellular Digital Packet Data (CDPD)

In 1992, AT&T Wireless Services developed cellular digital packet data (CDPD) protocol, a data-only protocol that (re-)uses the AMPS or IS-136 network. Packets (typically some 1.5 kilobytes) use vacant cellular channels – either an...