Until 2015 I was a branch manager and top field engineer for a Motorola dealer. I interfaced the MTR2000 repeaters many times to Zetron controllers for community, trunking and remote control systems. You should be able to connect to its connector and connect to the Allstar node with a simple DB25 to the Motorola connector directly. I think there is a pin out of the Motorola connector on the Bat wing or Repeater builders site. I used to order a connector kit from Motorola for this, it came with all green wires but you only need to wire up the COS / Tone logic, Ext PTT, RX Discriminator, Ext TX Audio to make it work. If needed I can check my books for the pinouts and settings in the repeater for you. Send me email at rickk5ric@gmail.com if you need help. 73 k5ric