Lexmark provides a range of interfaces, which can be used to extend the connectivity of your printer. For the majority of printers, the new interface is simply a push fit installation into the option interface slot - the printer automatically recognizes the new interface. In use, the majority of printers will auto switch between the standard and optional interface, allowing more than one interface to be connected simultaneously to the printer. The Parallel 1284-B Interface Card installs into the printer's PCI-based, Internal Solutions Port. It supports a parallel 1284-B compliant interface using a 36-pin D-shell female, bi-directional connector.