the following instructions apply only to installing a network module in a modular router chassis slot. you can install network modules in the chassis either before or after mounting the router, whichever is more convenient.

    before installing a network module into the router chassis, turn off electrical power to the router to avoid the risk of electrical shock to yourself or to the equipment. to see translations of the warnings that appear in this publication, refer to the regulatory compliance and safety information document that accompanied this device.

    unless the router is using a copy of the cisco ios 11.3(3)t or later release, you cannot install an isdn bri network module (or isdn bri wan interface card) into the same chassis as an isdn pri network module.

    the following tools are required or recommended for this task:

    . esd-preventive wrist strap

    . number 1 phillips screwdriver

    . duct or electrical tape (for routers using a dc-input power supply only)

    step 1 turn off electrical power to the router. do not unplug the power cable. if the router uses a dc-input power supply, remove power from the dc circuit with the following steps:

    a. locate the circuit breaker on the panel board that services the dc circuit.

    b. switch the circuit breaker to the off position.

    c. tape the switch handle of the circuit breaker in the off position.

    step 2 remove all network cables, including telephone cables, from the rear panel of the router.

    network modules are not hot-swappable. to avoid damaging the module, turn off electrical power to the chassis and disconnect all network cables, including telephone cables, before inserting or removing a network module.

    step 3 attach an esd-preventive wrist strap before handling the card, and connect the wrist strap to an electrical ground.

    step 4 using a number 1 phillips screwdriver, remove the blank filler panel from the chassis slot. save the blank filler panel for future use.

    step 5 align the network module with the guides in the chassis and slide it gently into the slot.

    step 6 slide the module into place until the edge connector is securely seated in the connector on the motherboard.

    step 7 using the number 1 phillips screwdriver, tighten the module's captive mounting screws.

    step 8 reinstall blank panels to fill any unoccupied chassis slots.

    to provide proper airflow, install the blank panels shipped with the router in any empty chassis slots.

    step 9 plug in the network interface cables and turn on power to the router. for a router using a dc power supply, remove the tape from the circuit breaker and turn the circuit breaker to the on position.