[Georges]

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je continue a écoute les autres alors que eux ne m’entende plus

Erreur et illusion qui peut devenir vite gênante. Avec des radios en CTCSS, tu peux choisir de pas entendre les autres, mais la réciproque n'est pas vraie.

Family Radio Service (FRS), PMR446 and other "bubble pack" radios often use from 10 to 38 different CTCSS tones (the number depends on the manufacturer), usually erroneously called "sub-channels", or "privacy codes" in the sales literature. While these do not add to the available number of conversations which can take place at once in a given area, they do reduce annoying interference experienced by users. However they do NOT afford any privacy or security, no matter what the sales literature says. A receiver with the tone squelch turned off (i.e. in carrier squelch mode) will hear everything.

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La fonction scan de deux canaux est présente sur la plupart des PMR.