Okay, got a little farther... PPPD doesn't complain about the pty, but now it's silently exiting without doing anything. Here's my command line:

pppd /dev/ircomm0 57600 192.168.1.3:192.168.1.8 noauth debug

192.168.1.3 is the Empeg's IP, 192.168.1.8 is the WinCE client. The pppd doesn't run, it just exits (doesn't appear in a ps -e output.)

I'm stumped.

By the way, does the IR discovery stuff happen regardless of pppd status? That is, can I do the echo 1 > /proc/sys/net/irda/discovery and then see some kind of response from the IR client in the discovery log? Or do I need pppd running first? I get absolutely no output in the discovery log right now.

Sorry for all the questions but I've never done anything with IrDA so all this is new.