Aces 5X8xnbd 3Yr Maintenance - Aces Is A Comprehensive And Flexible Maintenance Service Program Designed To Protect Your Network From Unnecessary Downtime. With Aces Protection, If Something Goes Wrong With The Adtran Equipment, You Can Design The Appropriate Level Of Support From Fully Trained, Ready-To-Assist Technical Experts. - 1100301M4 Adtran, Inc.