CompuServe Thread

I'm having some trouble getting the serial device on the Amiga to work properly for my new BBS program, and I would appreciate any help. The main problems are as follows: (i) When I use the set_params I/O request command to change from 1200 baud to 300 baud while the modem is communicating the Amiga gives me an Error 1 (device busy), and during a subsequent attempt to change from 300 to 1200 it crashes. Unfortunately I need to do this as otherwise no 300 baud callers will be able to call the system successfuly (at present I only allow 1200 baud callers due to this problem). (ii) When I use the standard serial routines at 1200 baud my output comes out as garbage (lots of @'s and 's) unless I put delays between every character. This problem is especially irksome during backspaces and returns as they require an even longer delay. (iii) I'm using a Qume QVT101 terminal with a Racal Vadic 3451 modem to do the tests and it works fine when calling other systems. My other question is what is the correct C routines for dropping DTR. This is not covered in the manual and we have tried various methods of clearing the serial device with no avail. (iv) Finally, I was wondering how to get a Control G to actually send the beep tone and not just flashes to the screen. If you'd like to give the new Amiga BBS a try you can reach it at 213-839-6867 at 1200 baud only. If you have any answers/comments we'd be very happy to hear from you via voice at 213-839-7828. Thanks ahead of time!