How does concurrency work for UC Premise Trunks?

For UC Premise Trunks, the reseller has the ability to determine how many trunks, channels, or sessions are required for their customers. This value is set at the Location level for each Sub-account. However, it's aggregated across all Locations/Sub-­­accounts. In other words, the total across all Sub-­­accounts is used to determine the concurrency available for the reseller account.