I can think of two places that might have been the Calami of Aristotle. The first candidate is the famous port city of Kollam, in Kerala, which was well known to the Phoenicians and Romans, and the second is the ancient city of Kalyani or Kalyan, in Karnataka, which was to later become the capital of one branch of the Chalukya Empire. The second city, which has recently been renamed Basavakalyan, appears to be the older of the two.