DVI-100
Digital Voice Interface for
TETRA-Infrastructure
September 2013
Funk-Electronic Piciorgros GmbH
Dipl.-Ing. Michael D. Piciorgros (CEO)
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.
Piciorgros GmbH * Germany
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.
Piciorgros GmbH * Germany
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).
The DVI uses the Open PTX Protocol
(www.openptx.org) developed in co operation by
the University of Dortmund and Piciorgros GmbH
Piciorgros GmbH * Germany
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
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
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
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
The 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
Piciorgros GmbH * Germany
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
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
The 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
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Questions?
Piciorgros GmbH * Germany
Piciorgros GmbH * Germany
Funk - Electronic Piciorgros GmbH
Claudiastr. 5
51145 Köln-Porz
Germany
Thank you very much for your interest in our Products
www.piciorgros.com
www.TetraModem.com
Piciorgros GmbH * Germany