Pinouts
Cable and port pinouts.
DB-25
DB-25 connectors are most often used on parallel ports.
DB-9
DB-9 Connectors are most often used on serial ports.
RJ45 and CAT5
RJ45 and Cat5 assemblies are used for control wiring in many designs. The 8-conductor cable is known as Cat5, and the connector is an RJ45 connector.