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TETRA |
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Potential |
Mobile Communications for Professional Users :
TETRA (TErrestrial Trunked RAdio), devised by ETSI to combine Cellular Mobile Telephony, Data and Digital Mobile Radio together on one open cellular platform.
Transportation, Utilities, Military and Security, Emergency Services and Public Sector Organizations seriously rely on TETRA, since this is the only digital standard that can provide them with the benefits of true multisourcing of the ETSI standard combined with a technology capable to meet their most exact needs. They also might need multi-media communication which can provide direct access to services such as voice, data, graphics and image.
Robust and Secure Communications :
TETRA is the only digital standard defined by the European Telecommunications Standards Institute (ETSI) to meet the needs of the most demanding users. Private Mobile Radio (PMR) and PAMR applications depend on reliable communications products and services. A good example is the emerging environment of peace keeping, where most of the operations will be joint efforts of several national armies. In such situations, the needs of the “battle space” for the high quality communication and information systems, with common or at least interoperable equipment, is steadily increasing. These factors are exert pressure towards harmonizing equipment procurement, and one way in which that can be done is through the use of more commercially available communications technologies, or even products. Especially attractive are those based on an open international standard, since they bring greater financial benefits associated with multiple product & technology sourcing.
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Added Value |
Performance :
TETRA is the first digital technology that offers the benefits of automatic operation and frequency efficiency of trunking, combined with the terminal autonomy benefit of a conventional PMR. TETRA offers a novel multi-mode capability by combining these two modes, trunking and direct (“conventional”), into single terminal equipment, and it also provides the standardized way of interworking between these two modes.
Secondly, TETRA is designed for users who need multi-tasking, i.e., to perform several functions simultaneously, e.g., voice and text messaging, or who need “bandwidth-on-demand”, facility to have a variable amount of bandwidth allocated to them for the call duration depending on the application. Thirdly, TETRA is designed for people who, in an emergency situation, demand almost instantaneous communication, both between individuals and within a group of an unlimited size. They need priority calls backed by call pre-emption if required, and on occasions an all-informed communication.
All this means that for professional users who require a demanding technology for increasingly complex operational needs of today and tomorrow, TETRA provides a choice of an unrivalled performance and flexibility.
Supports Voice, Data, Video and does it Securely :
The TETRA standard provides the ability for a single radio to be allocated multiple timeslots on a single radio frequency carrier, which allows for simultaneous data and speech communications to take place.
The multi-slot allocation can provide a maximum data capacity of 28,8 kbit/s gross or 19,2 kbit/s net throughput using one of the protected data services. This exceeds the capability of any other spectrally efficient wireless technology and will become ever more important with the rise in mobile data traffic.
Designed with the Professional User in mind :
The TETRA technology brings new outstanding features to mobile communications. It combines the features of mobile cellular phones with fast data communications and the workgroup capabilities of PMR and PAMR. The present TETRA systems already offer low-cost, elegant handsets, which can operate either as cellular telephones with high quality duplex speech and all the main telephony supplementary services, or as closed user group despatch communication with almost instantaneous 'press to talk' call set-up. Users have the option of encryption for voice and data, including end-to-end, and a whole host of standard
despatching services and facilities such as broadcast call, emergency call, call monitoring, etc.
TETRA is a fully digital technology providing consistent voice quality and low error rates for data traffic. It uses TDMA (Time Division Multiple Access) technology with four user channels on one radio carrier, with 25 kHz spacing between carriers, which makes it at present the most spectrally efficient digital mobile communications standard in existence. TETRA's open interfaces ensure interoperability with existing services and networks. It provides an ideal platform for third-party systems and products. It is also future-proof, offering easy integration and migration to future technologies and services.
An Open Standard :
Interoperability between all TETRA vendors is a precondition for the market success for manufacturers, operators and users. Although this is a very complex task, work has been running since mid-1997 and will continue as long as the standard evolves. A TETRA Interoperability Profile (TIP) has been developed as a complement to the core TETRA standards. Tests are also being created which allow conformance to the TIP to be demonstrated, in order to reduce testing costs for the user or the operator.
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