A blocked customer’s accounts and sub-customers cannot make calls. Its balance and settings stay as they are, so unblocking restores service exactly as it was. This is the same as Block and Unblock in the customer’s Actions menu in the panel. The customer can be anywhere below the authenticated customer in the hierarchy, including sub-customers of sub-customers.
Both methods support trusted mode with i_wholesaler, the ID of a customer above the one you block.