A coolant capable of enhancing corrosion inhibition includes a potassium formate solution having a first concentration of a polyphosphate salt and a second concentration of dicyandiamide. The second access switch is operatively coupled to the first access switch by a third cable. The caller ID information may be provided as a light pattern where the characters of the caller ID information are mapped to the elements of the light pattern being output, such as colors, period of light, and flashes. It can therefore be integrated into a print data stream for electrographic high-capacity printers.