steve, The original writer of the slmodem software no longer tracks this List. Likely none of us have an answer to your question. MarvS On Tue, Jul 6, 2010 at 1:10 PM, Steve Underwood <steveu@xxxxxxxxxxx> wrote: > Hi, > > There is a modem_test program that comes with the slmodem package, but I > can't see how it can be used. > > If I run modem_test, it creates two modem instances and connects them back > to back. If I connect to the AT command ports of both modem instances, using > a pair of minicom programs, I can use AT commands, and the two modem > instance respond properly. However, any attempt to dial or answer instantly > fails, because the two modem instances are running as fast as they can and > time out nearly instantly. > > Can anyone tell me how to get useful behaviour from this program? > > Steve > >