this chapter describes how to install network modules in a cisco 3600 series router, and includes information on installing either a wan interface card or a voice interface card (vwic) into the appropriate network module. the chapter contains the following sections:

    . installing a network module, page 4-1

    . installing a wan interface card, page 4-2

    . installing a voice interface card, page 4-3

    wan and voice interface cards in the network module either before or after the network module is installed in the router chassis.