DMO Another Powerful Feature of TETRA

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DIRECT MODEAnother Powerful Featureof
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AGENDA

• TETRA - 1st multi-mode digital standard
• What it TETRA Direct Mode (DMO)?
• DMO services facilities
• User benefits and applications
• TETRA competitive positioning the Standards
  roadmap into next millennium
• Conclusions

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TETRA - MULTIMODE STANDARD

• 3 standards in one
• Trunked (V D)
• Conventional (DMO)
• Data Only (PDO) --gt DAWS
• Common platform for VD DMO
• Multi-mode terminals
• Large commonality of services facilities

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WHAT IS TETRA DMO ?

• There are 4 operational modes of TETRA DMO
• Communication between Direct Mode terminals (a
  la conventional PMR)
• standard - Back-to-back or simplex
• extended - via Direct Mode Repeater
• Communication between trunked and Direct Mode
  terminals
• periodic scanning - Dual Watch
• continuous - via Direct Mode Gateway

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TETRA DMO - BACK-TO-BACK

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TETRA DMO Repeater
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TETRA DMO - Dual Watch
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TETRA DMO - Gateway
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DMO SERVICES AND FACILITIES

• Simplex speech - Individual or Group Call
• Circuit mode data up to 7.2 kbps, incl.
  point-to-point point-to-multipoint
• Status and short data service (SDS)
• Late Entry
• Emergency call
• Talking Party Identification (TPI) , incl.
  concealment

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DMO SECURITY (ENCRYPTION)

• Air-interface encryption - TEA1, TEA2 TEA3,
  incl. time stamping
• Implicit authentication
• Key management incl. Over The Air Rekeying
  (OTAR)
• Zapping (enabling/ disabling) terminals
• End-to-end encryption mechanism

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DMO BENEFITS APPLICATIONS

• Providing a service outside the coverage of
  trunking system
• Providing a fallback service
• if the trunking system becomes inoperative
• into areas with poor or no coverage
• Providing a restricted, local service (e.g. for
  special operations) inside trunking system
• Providing several levels of interoperability
  between users in trunking system and the Direct
  Mode system

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CONCLUSIONS

• Public increasingly demand greater effectiveness
  and efficiency of their Public Services
• This requires greater integration of Services at
  all levels including mobile communication
• The only way to meet these demands is by adopting
  genuine standard with multimedia capabilities
• TETRA is the most comprehensive digital standard
  available to PMR users
• Direct Mode is a powerful and unique feature in
  the total TETRA offering

however,
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Caveat emptor (buyer beware)! or how to tell
the genuine Standard from a false one?

• Are there at least two competitive tenderers
  offering same technology?
• Are there competing products independently
  designed, developed and manufactured from at
  least three different manufacturers?
• Is the technology approved by a recognised
  standardisation body?
• Are there independent accredited test houses that
  can validate equipment interoperability?

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Positioning of TETRA
VOICE
DATA
DATA
MOBILITY
SATELLITE
INMARSAT-P GLOBALSTAR IRIDIUM ODYSSEY
HF/ METEOR BURST
TETRA VD DMO
TETRA
GSM
TACS ETACSMATSNMT
PAMR
PMR
MOBITEX RD-LAP
UMTS
DAWS
Telepoint
HIPERLAN
CT2/3
DECT
GROUP CALL
BROADCAST CALL
TELEPHONY
STATUSSHORTDATA
TRAFFIC DATA
PACKET-DATA
144kb/s ISDN
2Mb/s
155Mb/s
BISDN
INFORMATION (bit/s)
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Thank You
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