If Qwest did your DSL the modem is very probably the Actiontec 1520/1524 Wireless Gateway. This is pretty much the only one that Qwest uses for their setups.
Is the modem a white box with 4-5 ports on it? If so, that's it.
These devices are nice as you will not need a router. The modem acts as a DSL modem, wireless access point, and a 4-port router all in one.
Qwest Spec Sheet Actiontec Support Site
Hope this helps!!