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DVI-100

Digital Voice Interface for

TETRA-Infrastructure

About TETRA

• TETRA (TErrestrial Trunked RAdio) is a

digital standard similar to GSM for voice

and data applications.

• All voice data will be processed and

encoded into a digital bit stream at the

sender side and decoded back to “analog

audio” on the receiver side.

• During the whole transmission process

within the TETRA infrastructure this digital

voice data remains a digital 1-0-1… bit

stream.

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The CoDec

• The CoDec (Coder / Decoder) used for the TETRA voice

process operates using an so called ACELP algorithm.

• (ACELP Algebraic CELP, CELP Code-Excited Linear

Predictive)

• The result is a fantastic TETRA audio quality for

special use in extreme environment as for Police,

Firefighters, Ambulance and other (industrial)

applications

DVI-100

• The DVI-100 (Digital Voice Interface) is a

special TETRA terminal, that feeds all

received TETRA voice signals to its

Ethernet (IP) port and vice verse, without

any conversion to analog. So there is no

reduction of the original TETRA voice

quality.

• Additional also Status and SDS messages

are forwarded to the DVI Ethernet port and

sent to a (any) destination IP (and vice

verse).

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DVI-100

• The DVI-100 can be operated in Server and in Client

Mode and can be used as follows:

– DVI Client to DVI Server [Back-to-Back]

– DVI Server to Infrastructure switch

– DVI Server to PC / iPhone / (iPad)

– TETRA MicroSPOT – DVI in DMO mode

Back To Back

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Through Satellite Link

Through Satellite Link

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Fallback Mode

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TETRA to non-TETRA

DVI100 with multiple group talks

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DVI-100 in DMO mode

• The DVI-100 can be operated in DMO Mode

and can be used as a TETRA Micro-Spot:

– Connected to a DVI-Server

– Connected to a PC / iPhone / iPad

– Connected to a TETRA Infrastructure switch

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DVI-100 Features

• Connect TETRA networks of different manufacturer

• Connect TETRA networks with different frequencies (380

MHz / 800 MHz)

• In house coverage

• Access to the own TETRA network from out of the

coverage area (Paris – Cologne)

• Temporary Micro-Spot (on site)

• Dispatcher

• Design your own application

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PC GUI

• The PC GUI

• Up to 10 “local” IP user displayed

• Up to 10 TETRA groups displayed

• Supervisor Mode (can change the active group)

• All PTT, SDS and Status are displayed with Time

Stamp and stored in a csv-database

• PTT Push To Talk button

• Signaling according to TETRA terminals

• SDS send feature

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iPhone and iPad GUI

• Up to 10 “local” IP user displayed (*)

• Up to 10 TETRA groups displayed (*)

• Supervisor Mode (can change the active group)

(*)

• All PTT (*), SDS and Status are displayed

• PTT Push To Talk button

• Signaling according to TETRA terminals

• SDS send feature (*)

• (*) iPad only

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