i want to install a voice chat server on openbsd

[hack2003]

i have openbsd 4.7 as my home all in one server.
it's working as internet gateway using PF, webserver and fileserver usign samba.
i want to setup a voice chat server for my brother net games.

for now i installed on his windows machine mumble and it work fine but i want to make use of the openBSD server instead my brother machine.

i tried to run mumble server using the fedora_base linux emulation but it didnt work.

is there anothe server that built for openbsd?

maybe there is a way to convert the ports for freebsd for openbsd?
or maybe to run the freebsd version on openbsd? if so then i would like to get help with that.

thanks Hack