... Telephone line tester with voice,can Test RJ45 and RJ11 network cables 2.Test correspondingly double-twisted cables 1, ... 2, 3, 4, 5, 6, 7, 8 and Ground 3.Test RJ45 ... and RJ11 network cables4.Test correspondingly double-twisted cables 1, 2, 3 ... from 1 to G.7.Detachable remote tester, test remote cable up to 1000ft. in length. ...