ADSL and dial up.

Hi I have ADSL with UKFSN set up with the modem set to be activated on boot. I want to be able to use a dial up connection occasionally from the same box. Using SuSE 9.0 is there a simple command I can use to disconnect from ADSL whilst I use dial up and then bring ADSL back after that dial up session ? The ADSL modem is connected via ethernet using dhcp if that helps. Thanks Mike