July 2002
Intermediate to advanced
344 pages
8h 37m
English
Content preview from Newnes Radio and RF Engineering Pocket Book, 3rd Edition
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18 Mobile radio systems
18.1 Paging
Where an immediate reply to a message is not essential, paging sys-
tems, which are basically a one-way path from controller to mobile,
are an economic option. Paging is also spectrally economic, only one
frequency being required and messages being of very short duration.
The recipient of a call may be merely alerted by means of a tone emit-
ted by the paging receiver or, if silent alert is required, a vibration.
Alternatively, pagers displaying, and storing, alpha-numeric messages
are readily available. Message handling services are also offered on
some paging systems.
On-site paging systems are usually owned or rented ...
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