Dual Repeater Package - The Maxon SM6000 Series have a built-in single channel repeater controller, here is a drawing that illustrates how two repeaters can be configured along with some of the options. (Click image to expand)

If you use Elastix as your Asterisk toolkit and have a problem with inbound email be sure to check Postfix - General Options.   You may need to set the “What domain to use in outbound mail” to <your domain name>.

The Asterisk USB Radio Interface (URI) Connection Guide is now available. It has connection information for Maxon and Icom commercial land mobile transceivers.

Asterisk URI Connection Guide (pdf)

Alinco FOB interface (pdf)