Client Support Center This is our support page where you can choose to enter a HelpDesk ticket, or engage one of our technicians for remote support HelpDesk Ticket (951)552-7252 CALL FOR IMMEDIATE SUPPORT Call the number below for new customers not managed by one of our support contracts (909)351-5638 If you are not an existing NSI client and to service you and your business better, please contact us at (951)552-7252 or go to our Contact page to reach us via email.If you require immediate support please contact us at (909)351-5638Thank you.