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Search term: Phone Butt Test Tester, Telephone Butt Test Tester, Lineman Tool, Network Cable Tester, Network Cable Set Features: This set offers Last number redial. On/Off and hangup buttons. Can check your telephone line fault. FSK/DTMF dual system. Hangup button. Last number redial. Description: Easy to use. This set offers Last number redial, On/Off and hangup buttons, so the lineman can check your telephone line fault. Hangup button. Last number redial. Easy for the lineman to check your telephone line fault. Specifications: Model Number: C019 Color: Gray-white, blue-gray Size: 147*46*28mm Package Included: 1 X Telephone Tester 2 X Connector Cables 1 X Joiner