title: looking for GSM / CDMA call detail record structure
body: <p>i am creating a program in java which will work on call detail records of GSM / CDMA.</p>
  
  <p>i am looking for standard structure of Call detail records used for GSM / CDMA. Can someone help me ?</p>
  
  <p>basically what are all the columns in a call detail record database of GSM / CDMA</p>