Product Review

The Triplett Line-Bug 4 is a simple tester to determine if there is damaging line current on RJ-11 and RJ-45 lines. Tests LAN jack (RJ-45) wired to 568A/B. standard for telephone line current. RJ-45 test plug is selectable via front panel switch for USOC (telephone) or 568 (LAN) connection. Use to test a LAN jack for telephone current, which might damage an expensive LAN tester. Compact design - fits in shirt pocket. Economical and convenient. One year limited warranty. Instructions: RJ-11 Phone Lines, Plug RJ-11 connector into jack and observe LEDs. Switch position does not effect test. RJ-45 Phone Lines, Set switch appropriately. (USOC for standard phone or 568 A/B for LAN). Plug RJ-45 connector into jack and observe LEDs. Do not plug RJ-11 into RJ-45 jacks. Damage may result. Newer phone lines are often wired to 568 A/B instead of USOC. Some LAN lines have telephone current on previously unused pairs. Pre-testing LAN lines with the Line-Bug 4 before testing with a LAN tester may prevent damage to your LAN tester. Plug RJ-45 connector into jack. Set switch to 568 A/B and observe LEDs. Next, set switch to USOC and observe LEDs. If any LED lights in either switch position, voltage is present. Founded in 1904, U.S.-based Triplett Test Equipment continues to be on the leading edge of specialized testers. Whether supplying vital test equipment to the U.S. Signal Corps during WWII, or providing the railroad industry with essential testers to ensure the safety of their crews and the public, Triplett prides itself in developing innovative, reliable, and durable test equipment for every technician--that also won't break the bank.