Battery Backup Unit Total Access 900e Series Hardware Installation Guide26 Copyright © 2010 ADTRAN, Inc. 64243916F1-34A5. BATTERY BACKUP UNITThe ADTRAN battery backup unit (BBU) is an optional device designed as a backup DC power supply forthe Total Access 900e Series.Total Access 908e BBU (P/N 1200641L1)The BBU connects to the Total Access 908e through a 2-foot charge/discharge, 2-conductor wire with akeyed modular plug (included with the BBU). The 1200641L1 BBU is a low profile wallmountconfiguration. The BBU is not rack mountable.Features of the BBU, P/N 1200641L1, include the following:• No-spill battery design• Compact wallmount box• 7 AHR battery (up to 8 hours of backup, depending on load)• Modular plug (provides quick and easy installation)• All mounting hardware includedTotal Access 916e/924e BBU (P/N 1175044L1/L2)The BBU connects to the Total Access 916e/924e through a 6-foot charge/discharge, 2-conductor wirewith a keyed modular plug (included with the BBU). The 1175044L1 BBU is a low profile wallmountconfiguration. It can be rack mounted with the appropriate 19-inch (P/N 1175047L1) or 23-inch(P/N 1175048L1) rackmount adapter brackets. The 1175044L2 is an equivalent BBU with a hinged frontaccess door.Features of the BBU, P/N 1175044L1/L2, include the following:• No-spill battery design• Compact wallmount or rackmount box• Double BBU rack mounting available• 7 Ahr battery (up to 8 hours of backup, depending on load)• Modular plug (provides quick and easy installation)• All mounting hardware includedUnpack and Inspect the BBUAfter unpacking the BBU unit, inspect it for damage. If damage is noted, file a claim with the carrier; thencontact ADTRAN Customer Service.Removing the BBU covers could allow batteries to fall out.The BBU (P/N 1175044L1/L2) weighs in excess of 30 pounds. Arrange for assistancewhen handling the BBU for mounting.