This document discusses the roles and functions of the key regulatory bodies that govern India's telecommunications sector - the Department of Telecommunications (DoT), the Telecom Regulatory Authority of India (TRAI), and the Telecom Disputes Settlement and Appellate Tribunal (TDSAT). It provides an overview of each organization, including that DoT manages licensing and spectrum, TRAI provides recommendations and regulates the sector as an independent body, and TDSAT handles disputes. The document also outlines some of the specific regulatory and recommendatory functions of these organizations in shaping policy and dispute resolution in India's large and rapidly growing telecom industry.