DSL: NetworkManager vs pppoeconf

[Jared Greenwald]

I just noticed that there is a tab under NetworkManager's "edit
interfaces" dialog that allows for setup of a DSL connection.  I also
noticed that if I configure an interface under pppoeconf, it no longer
shows up under network manager.  So, the question is, what is the
preferred method of configuring DSL?  Also, what is the field called
"Service" used for?

Thanks,
Jared