30 Chapter 1 Installing the Nortel VPN Router 2750 chassisNN46110-318 02.01Installing the chassis in an equipment rackTo mount the VPN Router 2750 in an equipment rack, you need the followingequipment:• a standard 19-inch equipment rack• four screws (supplied with the chassis)• four cage nuts (supplied with the chassis) if the rack does not have threadedrail holes• a #2 Phillips screwdriverRack-mount recommendationsWhen you mount the chassis in the equipment rack, observe the followingstandard recommendations:• Nortel recommends a maximum ambient temperature of 40oC (104 oF). Ensurethat the internal temperature of the rack does not exceed (104oF).• Do not block the power supply vents or otherwise restrict air flow wheninstalling the chassis in the rack.• Stabilize your rack so that it does not tip over under the weight of the gatewayand other devices.• Ensure that the electrical branch circuits can handle the VPN Router 2750 andother units in the rack before you install and turn on the gateway.• Maintain a reliable earth-ground path in the rack system. You must connectthe gateway to an earth ground.Attaching the shelf in the equipment rackThe VPN Router 2750 ships with a rack-mount shelf to support the chassis in theequipment rack.To attach the shelf to the inside of the equipment rack:1 If the holes in the rack’s vertical supports are not threaded, attach a cage nut infour locations at the front of the rack (Figure 3 on page 31).
