Drive | Tetra Manual - Google

Unit-to-unit communication without network coverage (walkie-talkie style).

Classes 1, 2, and 3 (TEA1, TEA2, TEA3, TEA4). TETRA MANUAL - Google Drive

A standard manual outlines several critical communication modes: and 3 (TEA1

High-priority calls that preempt other traffic. TETRA MANUAL - Google Drive

π4the fraction with numerator pi and denominator 4 end-fraction DQPSK (Differential Quadrature Phase Shift Keying).

Uses ACELP (Algebraic Code Excited Linear Prediction) at 4.8 kbit/s. 3. Key Operational Features