4. Line monitor (bidirectional, full duplex)
With this cable you will be able to monitor full duplex protocols, when both parties talk at the same time. However it will require two serial ports at your PC.
PC A will see what A (DTE) is sending to B (DCE).
PC B will see what B (DCE) is sending to A (DTE).
25 pin D-Sub
Cable for PC with 25 pin D-Sub connectors.
9 pin D-Sub
Cable for PC with 9 pin D-Sub connectors.