NORTEL NETWORKS BCM400  Base System NT7B10AAFRE5 w/ 3x-DSM 32+, 4x16, and a Digital Trunk Interface Module.  Also comes with a BCNM 1000e expansion unit. It was pulled from a working environment, power tested, and powers on as it should.  No further testing has been performed on this device.  .  Unit has attached rack mount brackets.  There are some signs of wear on this item from previous use.  All photos are of the item that you will receive.  We do not provide tech support or any software that is not already installed on this device.  If you have any questions, feel free to contact me.