Can anyone tell me how to config DNS when dialing with wvdial?

[doodler]

Hi,all,

       I am using wvdial to dial to my isp ,after it starts pppd ,I 
can not lynx www.debian.org ,lynx can not locate www.debian.org .
I think it is caused by my machine can not connect to a DNS server. 
            doodler
            [EMAIL PROTECTED]