before installing a voice interface card into the voice network module, 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.

    a voice connection requires both a voice network module and a voice interface card. voice interface cards are not installed directly into the router chassis, but must be installed in a voice network module to function. at least one other network module or wan interface card must be installed in the router chassis for any desired connections to the ip lan or wan to function.

    voice network module slots are numbered v0 and v1 from right to left on the router chassis.

    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 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.

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

    step 4 by using a number 1 phillips screwdriver, remove the blank filler panel from the voice module slot in the voice network module. save the blank filler panel for future use.

    do not install voice interface cards in a wan interface card slot or in a two-slot network module.

    step 5 align the card with the guides in the module slot and gently slide it in.

    step 6 push the card into place until the edge connector is seated in the connector on the module.

    step 7 by using a number 1 phillips screwdriver, tighten the captive mounting screws.

    step 8 plug in the network interface cables and turn on power to the router.