Modem lights

[John Cox]

I can't get modem lights to disconnect or connect  ppp0. I have to use 
network device control. This is a new install of fedora and the commands 
in modem lights say sbin/ifup ppp0 to connect and sbin/ifdown ppp0 to 
disconnect. I'm am a newbie and can't make much out of the scripts. I 
have searched for similar problems but the ones I have found are on 
different distributions and don't work for me.
thanks.