Serial Monitor

Doing some development of a Linux machine where I need to send and
receive data from the serialport. To do a bit of debuging I'm looking
for the linux equivalent of
portmon(http://www.sysinternals.com/Utilities/Portmon.html). Need a
utility that can capture all data sent and received, and also the
port-settings (baud, parity, data-size etc). Tried a few apps such as
serial sniffer and slsniff but could get them to work properly. Btw,
using Fedora Core4 with Gnome if that makes any difference.

.