2. Glossary

The following abbreviations are used throughout the document:

• AUT – Architecture Unique des Transmissions, which brings together all the technical rules and standards.

• BIV – Vehicle Interface Box, a set of mechanical and electronic components enabling a portable TETRAPOL terminal to be used in a vehicle or in a fixed environment (support, power supply, audio accessories, etc.).

• dB – Decibel, unit for measuring the ratio between two signals.

• dBi – Unit of measurement expressing the gain (or attenuation) of an antenna relative to an isotropic source.

• dBm – Unit of measurement expressing power relative to a reference of innVV.

• DGSCGC – Direction Générale de la Sécurité Civile...