Linux Infrared HOWTO
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# 3.17. Connection via Serial Cable

For some reasons it may be useful to connect via serial cable instead of using a real infrared link. Bjorn Hanson wrote: "Using a cable, I managed to get a PPP connection through my Ericsson SH888. I did the following (maybe some steps are wrong but they worked for me :-)

- added alias tty-ldisc-11 irtty to `/etc/conf.modules`

- edited /etc/irda/drivers to irattach /dev/ttyS0

- manually inserted the irda and irtty modules using modprobe

- start irattach

- run kppp using /dev/ircomm0 (through symlink /dev/modem)

- executed stty < /dev/ircomm0

- ping the host

- ifconfig irda0 down

Everything worked fine for ping and ssh (doing ls -l a couple of times) but the computer hang when I tried to mail (Netscape) this through that PPP. After reboot I tried both Netscape and lynx. Both were able to establish contact but none got any data."

Another way by Claudiu Costin:

- Linux 2.2.5 with IrDA compiled as modules

- Because irattach don't make kernel to load automatically IrDA stack, let's type modprobe actisys .

- Now, irattach /dev/ttyS1 -d actisys where COM2 is used for null link

- ping <address> works very good!

This has to be done for both machines.

Please note this is not the recommended way to connect two machines. Use PPP instead. Though I cannot see how this approach is useful I have included it beause it was asked sometimes in the mailing list.

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