It is used on a voice circuit. Verification can be obtained if an operator wishes to question a message or a portion of a message. Repetitions can be obtained if an operator have not received a message or a portion of a message clearly and request for a retransmission of that message or a portion thereof.
Lusetyenziswa kwisekethi yelizwi. Uqinisekiso lungafunyanwa ukuba umqhagamshelanisi unqwenela ukubuza malunga nomyalezo okanye isuntswana lomyalezo. Uphindaphindo lungafunyanwa ukuba umqhagamshelanisi akafumananga myalezo ngokucacileyo aze acele usluliso lwalo myalezo okanye isuntswana lawo.