54 CHAPTER 2: INSTALLING SYSTEM HARDWARE COMPONENTSPhysicalRequirementsYou can install an NBX 100 chassis in a standard equipment rack ormount the chassis on a wall. You must mount a SuperStack 3 NBX CallProcessor or a SuperStack 3 NBX Gateway Chassis in an equipment rack.Verify that the site meets these physical requirements:■ The NBX system must be installed in a secure area. Telephone serviceand voice messaging are crucial business services. Protect them fromtampering or accidental interference.■ To rack-mount either the NBX 100 or the SuperStack 3 NBX system,use a standard 486-mm (19-in.) equipment rack, properly installedand grounded according to the manufacturer’s instructions.■ The NBX 100 chassis requires 6 rack units, with 27 cm (10.5 in.) ofvertical space and 23 cm (9 in.) of depth. All connections are onthe front of the chassis.■ The SuperStack 3 NBX Call Processor Chassis and the SuperStack 3NBX Gateway Chassis each require 4 rack units, with 13.3 cm (5.25in.) of vertical space and 30.5 cm (12 in.) of depth. All dataconnections are on the front of the chassis and power connectionsare on the back.■ If you wall-mount the NBX 100 chassis, it must be attached securely toa plywood mounting board that is firmly attached to the wall. Themounting location must be able to support at least 13.5 kg (30 lbs)per chassis. You cannot wall-mount the SuperStack 3 NBX CallProcessor or SuperStack 3 NBX Gateway Chassis.■ Allow at least 8 cm (3 in.) of space on either side of the NBX chassisfor proper ventilation.CAUTION: The chassis cooling fans expel warm air from the left side ofthe NBX 100 chassis and from the right side of the SuperStack 3 NBXchassis. If you are installing two or more NBX 100 chassis or two or moreSuperStack 3 NBX chassis, do not mount them side by side because thewarm air expelled from one unit would be drawn into the second unit,reducing the effectiveness of the cooling system.
