Esi sixhobo sibonelela nge-1-16 ye-Channel E1 interface, i-Standard 2 yefowuni yomnxeba njengocingo lwe-odolo lobunjineli (ukhetho).Ibhetyebhetye kakhulu.Inomsebenzi we-alam.Umsebenzi unokwethenjelwa, uzinzile, kunye nokusetyenziswa kwamandla aphantsi, ukudibanisa okuphezulu, ubungakanani obuncinci.