Khokahano ea G.703 (Co-Directional G.703) e arola potoloho ea 64Kbps ka linako tse 4 tsa li-unit, e sebelisa "0101" e emela "0", "1100" e emela "1".Ka ho fapanyetsana polarity ea phetoho ea sebaka se haufi, matšoao a binary a fetola matšoao a mararo.