I went ahead and installed compass lite on a separate Rpi3, insterted the ThumbDV and installed ambeserver, and:

pi@TG9AOR:~ $ sudo systemctl status ambeserver@... -l

● ambeserver@... - DV3000 Daemon
   Loaded: loaded (/lib/systemd/system/ambeserver@.service; enabled)

   Active: active (running) since Thu 2017-02-09 12:16:47 UTC; 2min 28s ago
  Process: 702 ExecStartPre=/bin/chmod 0660 /dev/%i (code=exited, status=0/SUCCESS)
  Process: 687 ExecStartPre=/bin/chgrp dialout /dev/%i (code=exited, status=0/SUCCESS)
 Main PID: 717 (AMBEserver)
   CGroup: /system.slice/system-ambeserver.slice/ambeserver@ttyUSB0.service
           └─717 /usr/sbin/AMBEserver -p 2460 -i /dev/ttyUSB0 -s 460800

Feb 09 12:16:47 TG9AOR systemd[1]: Started DV3000 Daemon.
Feb 09 12:16:47 TG9AOR AMBEserver[717]: AMBEserver: Starting...
Feb 09 12:16:47 TG9AOR AMBEserver[717]: AMBEserver: Opened serial port /dev/ttyUSB0 at 460800 bps.
Feb 09 12:16:47 TG9AOR AMBEserver[717]: AMBEserver: Initialized AMBE3000R version V120.E100.XXXX.C106.G514.R009.B0010411.C0020208.
Feb 09 12:16:47 TG9AOR AMBEserver[717]: AMBEserver: Listening for connections on UDP port 2460.

So the setup now is

Rpi2 with DVMega(Repeater2) and ircDDBGateway -192.168.0.10-connected to Repeater 1 via 192.168.0.12 & Port 20011

RPi3 with ThumbDV and ambeserver-192.168.0.11-Listening on port 2460

Windows 10 Laptop with DummyRepeater(Repeater 1)-192.168.0.12-Connected to ambeserver via the Dongle Tab on DummyRepeater(DV3000 Network-192.168.0.11 & Port 2460) and connected to ircDDBGateway via the Network Tab(Gateway 192.168.0.10 & Port 20010) and this is where I am not sure, I left Local IP Address 127.0.0.1 & Port 20011, but I have no devices attached here to this laptop.

The DummyRepeater does not connect to the Gateway, it does not bring up the not linked status. When I press the Transmit button on the laptop, the ThumbDV does light up, but I do not pass any audio to the Gateway as I am connected to REF012E for testing and the audio does not come back to the laptop. I do see on the Gateway's log passing AMBE to port 20011 but I do not hear a thing on my laptop.

What did I miss??

Thanks.