This function will return the details of each call in a campaign. At the most it will return 2000 records. If you have a campaign with more than 2000 records, use the offset variable to retrieve all the records.
For example: To retrieve 4000 records, you would call the method with offset 0 first, then call with offset 2000 to get the next 2000 records.
Get Full Campaign List
Get Campaign By Name
Get Call Details