Call Billing Requirements. The Contractor shall be responsible for comprehensive billing services for all calls including Collect Calls, Pre-Paid Calls, and international calls in accordance with FCC and CPUC approved rates. The Contractor’s billing system shall be capable of recording data for all calls attempted, including calls completed and calls not completed. Data recorded shall include the date, time, calling instrument, called number, type of connection, type of billing, whether the call is completed, call minutes, message units, and why the call was not completed if appropriate.