Strenuous efforts have been made by Deaf communities, NGO's, researchers and other organisations working for people with hearing disabilities , including the All India Federation of Deaf (AIFD), National association of the Deaf (NAD) in the direction of encouraging IPSL. Until 2001, no formal classes for teaching IPSL were conducted in India. During this period, Ali Yavar Jung National Institute of Hearing and the Handicapped (AYJNIHH), Mumbai, established an IPSL cell. It started a course called "Diploma in Sign Language Interpreter Course". The curriculum designed for the course aims to develop professional communication in Sign language and ability to interpret professionally. It also focused on the basic understanding of the Deaf community and Deaf culture. Later, the course was offered in the regional centers, in Hyderabad, Bhuvaneshwar, Kolkata and Delhi.