A collection of useful links which will help you on your MilNet journey:
Manufacturers of the Version 3 interface cable utilized extensively in this project. A link to the actually cable is here.
AllStarLink, the transport layer at the heart of MilNet and the centre of the RoIP cluster.
EchoLink. Your first stop in connecting to MilNet. Don't forget you need to validate your Callsign before you can use EchoLink. Details here.
The MilNet Cluster AllStar and EchoLink bridge connection. Here you can see the communications happening between the 2 networks.