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About This Item
Full Description
The aims of the present document are:
- to provide the reader with sufficient knowledge to engage in qualified discussions with the equipment and service suppliers;
- to expose the reader to the specific language and technical terminology used in the standard;
- to enable the reader to understand the flexibility in system design, system network topography, system availability, various modes of operation and security features;
- in clause 10, sufficiently detailed design information is given to allow link budget calculations to be carried out and outline radio coverage planning to be performed. Some preliminary calculations are also given for co-existence between trunked and direct mode terminals and also for the number of direct mode talk groups (Nets) that can operate simultaneously at the same location.
It should be understood that, as in all standardization activities, there is an inherent conflict between the users' wish to have as broad a standard as possible and at the same time wanting to have as much as possible of that broad standard available and implemented right from the beginning of service. Potential equipment purchasers, network operators and service users should make sure they influence the suppliers to have their required functionality available when they need it.
Equipment manufacturers will use the broad flexibility provided within the standard to develop and implement equipment in various ways, and still be conforming to the standard. This broad availability of equipment, each optimized around certain features and functionalities, needs to be carefully analysed by network operators and system users to find the supplier with equipment suited best for their needs.
Document History
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ETSI TR 102 300-3
viewing
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Designers' guide; Part 3: Direct Mode Operation (DMO)- Most Recent
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ETSI TR 102 300-3
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Designers' guide; Part 3: Direct Mode Operation (DMO)- Historical Version