9x5xNBD RESPONSE: Full Support 9 hours per day, (9am-6pm EST) , 5 days per week (Mon-Fri) for 52 weeks per year, including holidays. Replacement component parts will be dispatched for next business day delivery provided the call is received by Top Ten prior to 5 pm EST. Top Ten is responsible for all parts, on-site tech support as needed and limited technical phone support during non coverage hours.