Originally Posted by tzpow2k2
In minicom I configured the serial port to /dev/ttyS0. Thats where the modem is. In Minicom, I type echo atdt2837888 it rings and I pick up the phone and it hangs up after 3 seconds. It never goes beyond 3 seconds.
I assume you meant you typed atdt2837888 into minicom w/o the "echo." The fact that it dialed and rang your phone would indicate you successfully talked to your modem and it was working. It probably hung up because there was not a modem at the other end.
You can probably echo the atdt command to /dev/ttyS0 as root
and get it to work, but there might be complications. Programs like minicom and pppd set a bunch of parameters for the serial line. When you use the echo command you will have to set these manually with the program stty. Also be aware that a long time ago when I played around doing what you were talking about, I sometimes seriously hosed the serial line. I never knew why.