An apparatus for enabling a connection over a serial interface is provided. The apparatus is a connector interface that includes a plurality of switches configured to cross-link signals to switch a straight-through connection to a null-modem connection. Additionally included is a microprocessor in communication with the plurality of switches, whereby the microprocessor is capable of interfacing with the plurality of switches to trigger the switch to the null-modem connection. Circuitry and a hardware implemented method for enabling a connection over a serial interface also are described.