aborative twell Bratt. projects aimed at establishing the standards, technology and appli- NCC (1983) Handbook of Data Communications, NCC Publica- cations for Integrated Broadband Communications in Europe and tions, England. now has nearly 100 projects due for completion by the end of 1992. A further stage of this programme is now being planned to extend Purser, M. (1987) Computers and Telecommunication Networks, Blackwell Scientific Pub. the work until 1994. In CCITT work is continuing with the enhance- ment and addition of new recommendations on Broadband ISDN Redmill, F.J, and Valdar, A.R. (1990) SPC Digital Telephone with a further set of recommendations being issued in 1992. Exchanges, Peter Peregrimus Ltd. Whilst these standards are being developed various companies Rutkowski, A.M. (1985) Integrated Services Digital Network, and administrations are involved in a variety of different field trials Artech House Inc. This page intentionally left blank Radio paging Richard J Mumford C Eng MIEE Multitone Electronics plc Contents Introduction 45/3 Markets 45/3 Frequency allocations 45/3 45.4 Paging receiver types 45/4 45.5 On site paging 45/4 45.6 Large on site systems 45/6 45.7 Wide area paging 45/9 45.8 Paging receiver design 45/11 45.9 Private wide area paging 45/15 45.10 Pan-European systems 45/15 45.11 Indirect satellite paging 45/17 45.12 Bibliography 45/18 This page intentionally left blank Introduction 45/3 45.1 Introduction 45.3.1.2 Wide area Radiopaging is a cost effective solution for staff location, alerting V.H.F. personnel and transmitting one way messages or data. Compared to land mobile radio, and cellular radio, radio pagers or 'bleepers' as National and public systems exist on frequencies 138MHz to they are known in hospitals, are much smaller and less expensive. 141MHz and 153MHz to 153.5MHz. Private wide area schemes are They are also less expensive then CT2 or DECT handsets and are assigned 'to manufacturers' preferred frequencies' in the 153MHz not limited in range as are these systems. With