B00UOEUN7M Wire track: Directly track wire type: RJ45,RJ11;Track other wire through the attachment sequence collation: Open circuit, short circuit, detection of cable line sequence Switch port collation: detection switch connected condition Telephone line test: Identify the state of working telephone line(clear,ring,busy) Network wire collation: Test device used with UTP (Unshield Twisted Pair) and STP (Shield twisted Pa