Why can't I find a router for my USB ADSL modem

[scott]

Hi

All of the cable and DSL modems I know of have an Ethernet connector that fits into the WAN port of a router such as the Linksys BEFSR41 EtherFast 4-Port Cable/DSL Router. Netgear and Belkin also make such routers. But my Internet Service Provider provides its users with a USB DSL modem. You plug an RJ11 cable they provide into the telephone socket and then into the modem, and then use a USB cable from the modem to the computer. This makes it impossible to use a router such as the one I just named. Can you tell me if there is a router that performs the functions of that Linksys router but which also allows me to plug a USB DSL modem into its WAN port?

Thanks