GB Instruments Dual Liner Tester: For troubleshooting common problems on standard dual line analog telephone lines LED readouts indicate: dead line, reversed or miswired line, AC voltage present, line OK Can be used on standard single phone lines Not for digital phone lines
- Use for troubleshooting common problems on standard dual line analog telephone lines
- LED readouts indicate: dead line, reversed or miswired line, AC voltage present, line OK
- Can be used on standard single phone lines
- Not for digital phone lines