NEBS Compliance

Network Equipment Building System (NEBS) is a USA standard for telecommunications equipment safety and reliability. In the case of port-side intake airflow the system must be NEBS compliant. To be NEBS compliant, install the NEBS kit by following these steps:

1. Install two front rack–mount brackets onto the switch.

   1. Determine which end of the chassis is to be located in the cold aisle as follows:

      • If the switch has port-side intake modules (fan modules with red coloring), position the switch so that its ports are in the cold aisle.

      • If the switch has port-side exhaust modules (fan modules with blue coloring), position the switch so that its fan and power-supply modules are in the cold aisle.

   2. Position a front-mount bracket so that four of its screw holes are aligned to the screw holes on the side of the chassis.

      Note: You can align any four of the holes in the front rack-mount bracket to four of the six screw holes on the side of the chassis. The holes that you use depend on the requirements of your rack and the amount of clearance required for interface cables (3 in. [76 mm] minimum) and module handles (1 in. [25 mm] minimum).

   3. Secure the front-mount bracket to the chassis using the four M4 screws and tighten each screw to 12 in-lb (1.36 N·m) of torque.

   4. Repeat Step 1 for the other front rack-mount bracket on the other side of the switch, and be sure to position that bracket the same distance from the front of the switch.

2. Align the tabs on the NEBS air baffle on the slots on the front rack-mount bracket and snap the NEBS air baffle into place as shown in Figure 1 or Figure 2.

   

   

   1.	NEBS air baffle	2.	Front rack-mount bracket

For more information on how to install the switch, see the Installing the Switch in a 4-Post Rack and Installing the Switch into a 2-Post Rack.