Try using AT&D0+MS=12,1,28800,56000
> I have RedHat 5.1, and a TDK *Express 5600 Modem (upgraded to v90).
> I can connect to my ISP, but after using the modem a while (anywhere
> from 5 minutes to 30 minuts) the modem goes slower, and slower until it
> finally stops working. I then must de-activate my connection, re-acivate
> and continue. This is a real pain. Does anyone else have this same
> problem? Is there anything that I can do about this?
> This is the Modem Init String that I use: AT+MS=12,1,28800,5600
> This is the modem Dial Command: ATDT
> Thanks for any help that you can give me.