It wasn't this difficult 40 years ago ... Logging in to bulletin boards, university mainframe, CompuServe(!) ....
Just resurrected my 1978 Apple II. The Mountain Computer CPS card just didn't work any more so I got an Apple SuperSerial Card.
All working fine. I get the "APPLE SSC: " prompt. It responds to CTRL-A commands like Echo. Connected to an external USR V.92 Faxmodem. When SSC engages, the modem indicates "Terminal Ready" (TR).
I have a list of Bulletin Boards (https://ramsaso.com/) and when I dial-up a number I hear those sweet tones from the 1980s. BUT, nothing happens. I get no Carrier Detect (CD) . Nuffin. It just screams away at me.
I flipped the switch on the modem to override the CD (I read something about doing that somewhere), but it nothing happens.
I don't remember it being this hard. Any hints?