Dead on arrival (DOA) is defined as a product that fails at initial power-up Once TAC has determined the product to be DOA and eligible for new product, a request for a replacement and Returns Materia...Dead on arrival (DOA) is defined as a product that fails at initial power-up Once TAC has determined the product to be DOA and eligible for new product, a request for a replacement and Returns Material Authorization (RMA) will be submitted. A replacement sales order will be created as well as a RMA to return the defective gear. Return the defective gear to the designated Cisco return depot within 30 days to avoid being invoiced for the replacement product.