64243916F1-34A Copyright © 2010 ADTRAN, Inc. 131. INTRODUCTIONThis hardware installation guide describes the Total Access 900e Series units’ physical characteristics, lists theirfeatures and specifications, introduces basic functionality, and provides installation instructions.• Physical Description on page 14• Product Specifications on page 20• Unit Installation on page 21For additional information on shipping contents, mounting options, and power the unit, refer to the followingsections:• Shipping Contents on page 14• Mounting Options on page 22• Supplying Power to the Unit on page 25• Battery Backup Unit on page 26For information on Total Access 900e Series configuration for a specific application, refer to the configurationguides provided on the ADTRAN Support Community. For details on the command line interface (CLI), refer tothe AOS Command Reference Guide. All other related documents are also available online athttp://supportforums.adtran.com.