The Telecom Disputes Settlement and Appellate Tribunal (TDSAT) has been rendered defunct with the retirement of its only serving member, P.K. Rastogi today. The functioning of the TDSAT had been impaired since the retirement of the former Chairman, S.B Sinha on November 2, 2012. Although Justice Cyriac Joseph was appointed as the new Chairman, sources indicate that he would not be joining the TDSAT.