The KAD/SWI/107 is an Ethernet tap module designed for operating in harsh environments. All connections use copper cabling, minimum specification CAT5.  

Two individual ports of the KAD/SWI/107, which together implement a tap on the Ethernet link, are referred to as a tap port pair. One of these ports is referred to as the tap port; the other port is referred to as the paired tap port.  The tap port pair may be configured as 10BASE-T or 100BASE-TX and connect to the external Ethernet network. The pair of aggregator/monitor ports can only be 100BASE-TX and connect directly to an Ethernet sink device such as a NET/REC/001 or a KAD/EBM/101. 

The KAD/SWI/107 provides an active non-intrusive mechanism to monitor the traffic on an external network. Traffic received on each of the tap ports is forwarded to both of the aggregator/monitor ports and the paired tap port. The traffic forwarded to both the aggregator/monitor ports is identical, which allows for the data to be simultaneously recorded, analyzed, displayed, and parsed. Traffic received on the aggregator/monitor ports is not forwarded to the tap port pair. 

There is a network activity register for each tap port that counts the number of packets received through each port and the packets forwarded through the other three ports during a one-second interval. Both registers can be read over the backplane.