Areas of application

Date: 2015-10-07; view: 545.

Digital technology

The analogue cordless telephone has succeeded in opening up the market for localised mobility around the home or place of work, without incurring the costs and regulation associated with a fully mobile cellular radio service. However, its analogue nature and, in its more successful form, limited traffic carrying capabilities se­verely limited its full development potential. What was needed was a ubiquitous technology that could be exploited widely in the home, office and factory, in such numbers that all could benefit from the economies of scale that mass uniform production can provide. The new generation needed the characteristics as in the following sec­tions.

1. Residential, private use in houses and apartments.

2. Small CT systems for office use.

3. Large CT systems, multi-cell private switch telephony based building mobile systems with roaming and in-call handover between cells (the so-called cordless business communications system, CBCS).
4 .Radio access to local public and other telecommunications networks, e. g. telepoint systems.
The CBCS opens the opportunity towards the cordless office with greater freedom to rearrange office space as work demands. This is a result of reduced telecommunications wiring needs and costs. However radio coverage over the entire service area must be good enough to ensure that the probability of a call being set up exceeds 99% otherwise users expectations, based on the performance of wired telephones, will not be met.

Telepoint is a service provided to cordless handset owners from cordless base stations located in public places, e. g. railway stations, shopping precincts, fast-food restaurants etc. This is a basic public communication service for the less migratory more localised sector of the travelling market and thus does not compete directly with the wide roaming mobile cellular network. Hence a handset purchased for use in the home and/or work place can also be used to gain access to a telepoint service whilst the user is in transit between them.