A method and apparatus for providing a telecommunication service is disclosed wherein a call associated with a first prepaid services account identifier is received from a user. The invention relates to the seeds of inbred corn line 6RT321, to the plants of inbred corn line 6RT321 and to methods for producing a corn plant, either inbred or hybrid, by crossing the inbred line 6RT321 with itself or another corn line. The sulfur rich permeate and a second fraction of the fractionation zone, which contains sulfur-containing aromatic hydrocarbons, are further treated in a hydrodesulfurization zone.