The report item Centum Call Seconds (CCS) is the number of 100-second increments in which the trunk was busy during the intrahour interval. A trunk is seized while the call is both in queue and connected to an agent. Therefore, wait time for abandoned calls is figured into the CCS figures. For example, since a half-hour has 1800 seconds, the maximum CCS for each trunk in a trunk group is 18 CCS. Multiplying 18 CCS by the number of trunks in a trunk group gives you the maximum occupancy for the trunk group, which you can then compare with your actual CCS. If your intrahour interval is 15 or 60 minutes, your number will be different.