Re: Dial-up bulletin boards
Line simulator is not a problem. I simply connect the two modems to different extensions of my house PABX.
I had considered the idea of setting up two computers with serial ports connected to two modems as a backup option.
As to a known-good modem, I probably have one somewhere, including 300 bps (which is my immediate requirement). Many years ago I had a Pace modem for use with my BBC Micro that did 300 and 1200/75 - which I sold before I got into vintage computing and have several times regretted since.
edit: cross-posted with Sirius
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