VS 2001
Technical Handbook
General Information
Page 10
Marconi Proprietary information
P/N: 779-0373/02
Revision 02
1.5
CHARACTERISTICS AND OPERATING FUNCTIONS
The main functions and services carried out by the VS 2001 equipment are:
•
TETRA protocol management in radio environment with
π
/4 DQPSK
modulation (air interface levels 1, 2 and 3) in order to establish the connection
to the other TETRA radio connected to the network;
•
Capability of managing both Half-Duplex and Full-Duplex (Time Division)
voice and data calls, via multi-access operation;
•
Capability of operating in Direct Mode. In this operating modality the network
infrastructure is not used for communications between radios which must be
in direct radio coverage. In Direct Mode, the VS 2001 radio equipment
communicates directly with another radio unit by using a specific protocol. The
radio units must be tuned to the same frequency which is alternately used for
transmission and reception;
•
Simultaneous voice and data transmission with multi-slot services
management capability. In particular, a high speed data transmission up to
28.8 kbit/s is allowed;
•
Concurrent services management capability, as, for example:
-
1 slot for SDS (control channel) + 1 slot for voice call;
-
1 slot for voice call + 1 slot for data call.
•
Operating
services:
- Trunked
Mode
- Half-Duplex
Mode;
-
Full-Duplex Mode (Time Division).
- Direct
Mode:
- Half-Duplex
Mode.
The operating modality selection is carried out by the user.
•
Selection and sending of voice call, with the possibility of selecting the priority.
The voice calls may be Individual or Group type;
•
Voice and data communications management with:
- Mobile
radios;
- Dispatcher
stations;
-
Public or internal network telephone users.
•
Transmission and reception of alphanumeric SDS messages (Short Data
Message) sent by the user by means of the radio equipment’s Front Panel;
•
Data messages queue management;
•
PEI management (Peripheral Equipment Interface), in compliance with the
TETRA ETS 300 392-5 standard;
