Simple Kamailio Configuration

We are looking for a simple Kamailio configuration to act as a SBC of sorts. We have a SIP based fax server that isn't able to fail-over to the next peer if the call fails. We would like to have Kamailio try a list of servers sequentially until the call completes. We only need Kamailio to handle egress calls from the fax server to pstn. We will additionally need to proxy media and will require direction on configuration of this aspect as well. Solution needs to work with t38.