com21 comcontroller 2000 rack mount chassis for isp. includes the following boards. (2) ac psu power supplies, (2) hummer fan trays, (1) atm-1, (1) 10-bt ethernet, (1) cp5020-n 5000-series cable modem If you need help with ordering or configuring your system call: © 2010 Ames Sciences, Inc. All rights reserved.