Kalaignar TV's managing director Sharad Kumar and a former COO of Sun TV Network today appeared before CBI here in connection with the illegal telephone exchange case.

Kumar and former Sun TV Chief Operating Officer Hansraj Saxena appeared before the Anti-Corruption Bureau of the CBI here this morning for enquiry, CBI sources said.

CBI had in October last year filed a case against the then Union Telecom Minister Dayanidhi Maran and BSNL officials for allegedly allotting 300 high-speed telephone lines to Maran's residence in Chennai, which were extended to his brother's channel.