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TETRA vs GSM: Key Differences Explained

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This page outlines the core differences between TETRA and GSM technologies. We’ll explore their distinct features and compare them side-by-side.

TETRA System

Defined by the European Telecommunications Standards Institute (ETSI), TETRA stands for Trans-European Trunked Radio System.

It boasts a maximum data transmission rate of 36 Kbps, utilizing π/4-DQPSK modulation.

GSM System

GSM, or Global System for Mobile Communication, is a widely adopted mobile communication standard.

It supports both circuit switching and packet switching methods.

GSM networks invariably operate in a star configuration, with all communication routed through a base station. Consequently, when two mobile devices need to communicate, the call setup and processing are handled via the base station.

Basic Comparison Between TETRA and GSM

The following table highlights key differences between TETRA and GSM technologies:

SpecificationsTETRAGSM
Access techniquedigital TDMAFDMA, TDMA
Frequency of operation400 MHz800MHz, 900MHz, 1800MHz, 1900MHz
Bandwidth6.25KHz25KHz, 12.5KHz (1/2 rate codec)
Call setup time<1 sec<10 sec
Data supportavailableavailable
Group callssupportedNot supported (available in conference mode)
WAN communicationPossibleAvailable
Handover/roamingsupportedsupported
Authentication & Encryptionsupportedsupported