Mysuru: The Mysore Telecom District Secondary Switching  Area (SSA) consisting of Mysuru and Chamarajanagar Revenue Districts is one of the best performing SSAs in Karnataka which has earned around Rs.90 crore revenue last year and provided 4,000 voice connections, 3,000 broadband connections and 3,500 optical fibre networks, said BSNL Chief General Manager of Karnataka R….