How Do You Create A Null Modem Cable?
Null modem cables are used to facilitate communication between two computer devices. Their construction is similar to the RS-232 low-speed serial communications standard. Although faster technology has been developed, older devices may not have newer, high-speed data ports available. As with other older electronics, null modem cables can be difficult to find and may require you to create your own. Determine the length of cable needed for your application. Add several inches to your estimate to allow for some error. Leaving some slack in the cable will reduce stress on wires and connectors and prevent the cable from becoming damaged. Cut the wire and strip 1/4 inch of insulation from both ends. The number of wires you’ll need depends on the connector type and communication requirements of your devices. Null modem cables typically use 9-pin or 25-pin connectors. Do not mix connector types. Make enough wires for the connector you will be using to be safe. Size the heat shrink tubing and c
