| 摘要 |
<p>A connection testing device is provided for testing connections in telecommunications cabling. The testing device comprising a multi-terminal pair plug-in module for insertion into one of a plurality of corresponding multi-terminal pair connection or disconnection blocks. Serial switching means sequentially switch through individual terminal pairs in the block, each terminal pair being arranged to receive first ('A') and second ('B') wiring legs. Parallel switching means selectively connect or disconnect in parallel all of the terminal pairs in the block. A buzzer indicates when a valid or invalid connection has been established in respect both of a particular block and of the terminal pairs in the block. Connection testing is considerably speeded up as a result of the capacity of the device to test terminal pairs en masse before switching through individual pairs. The device includes a polarity indicator circuit, a signal generator and switching means for selectively switching between signal transmit and receive modes.</p> |
