[cctalk] delphi, before 1990

Hey all, was Delphi accessible as a bulletin board before 1990? I'm only finding logos and info about Delphi post-1990. But for early 1980s, what as Delphi? Was it a telnet-sort-of-thing only accessed only from universities? I've searched through early BYTE and PC Mag and just not finding any advertisements about it. -Steve