45Installing Secure Router 4134 hardwarecomponentsThe Secure Router 4134 ships with the fan tray installed, as well asthe power supply unit or units that you ordered. This section containsinstructions for installing hardware components, as well as instructions forreplacing a fan tray, power supply unit, and internal components.Navigation• "Installing the interface modules" (page 45)• "Hot swapping interface modules" (page 49)• "Connecting power cables" (page 51)• "Connecting the console port cable" (page 56)• "Installing or replacing a power supply module" (page 57)• "Replacing a fan tray module" (page 58)• "Installing or removing the internal VPN/IPSec module" (page 59)• "Replacing the DIMM" (page 63)• "Replacing the internal Compact Flash" (page 65)Installing the interface modulesYou install the optional interface modules in the front panel of the SecureRouter 4134 chassis. You can install interface modules with the power onor off.The chassis has horizontal slots for small, medium, and large interfacemodules. The chassis ships with four small slots, and three medium slots.You can adapt two of the medium slots to accommodate a large module(which spans two medium slots). You must order modules separately.The following figure shows the default slot configuration and indicates howslots are numbered on the Secure Router 4134.Nortel Secure Router 4134Installation — Hardware ComponentsNN47263-301 01.02 Standard10.0 7 August 2007Copyright © 2007, Nortel Networks.