UMurmur

uMurmur is a minimalistic server for Mumble designed to run on embedded systems (DD-WRT or OpenWRT) or older PC hardware. It does not include the QT framework, which makes it a much smaller package and lighter on system resources.

Emerge
Install uMurmur via:

Configuration
For the most up to date details on configuraiton visit the configuration article on uMurmur's GitHub page.

External resources

 * Installing uMurmur on DD-WRT