1/9/2023 0 Comments Tetra definitionTo a lesser extent, local area DMO communication is also used in poor TMO RF coverage areas and/or when service from a local base station site is lost. Local area DMO communication is mainly used to provide additional capacity outside the TMO network for localised work activities, major incidents and/or periodic events. To improve communication capabilities when using these applications, facilities are provided to enable DMO users to be contacted by TMO network users when operating outside the network as well as facilities to enhance local area DMO RF coverage performance. The typical applications for DMO are local area communications outside the TMO network and range extension of the TMO network. The primary requirement for DMO in TETRA has been brought about by the need to balance the RF coverage, Grade of Service (GoS) and reliability of a network with that of the network’s overall cost. DMO is not new and has been a fundamental mode of operation by many traditional PMR user organisations for several decades. DMO is the term used by the TETRA industry to describe the ability of TETRA radio terminals to communicate directly with each other (like ‘Walkie-Talkies’) independent of the Trunked Mode Operation (TMO) network.
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