A question to the #retrocomputing people: does anyone have an idea what parameters need to be set on a modern #modem when calling a V.21 300 baud modem?
Neither my Elsa Microlink 56k nor the internal modem of my iMac G4 are able to CONNECT...
@acn128 did you try AT&N1 ?
@crdotson
This returns only "ERROR"... and I cannot find this command in the documentation...
what should this do?

@acn128 On some modems, it sets the line speed to 300.

I’m only guessing with the rest of this, so take it with a grain of salt. It’s possible you need to get an older modem, because that one may not have the ability to do 300 baud. If AT&N0 works (for automatically select), your modem probably can’t do 300, but if that also gives an error, maybe your modem has some other way to set the line speed.