Someone kindly pointed me to the archive to fetch `eject`. Thank you! So, now the 3Gdongle switches from CD to modem mode.
On my slak:PC, modifying the old chat-script which calls `pppd` works fine. On rPi attempts at installing *ppp* starts the dependency dance.
The 1st depenency: libpcap0.8 could be hidden deep inside the archive. Slak doesn't even need it, although it's got docos.
So I'm thinking that rPi has a different method, than pppd. Of the millions of rPis sold, is there nobody who simply connected via a 3Gdongle?
== TIA.