I'm trying to interface a USB-URI to a JPS Communications NXU-2a (https://jps.sugarmapleinteractive.com/wp-content/uploads/2016/04/NXU-2A-Manual-June-2016-Rev-2-0.pdf - Page 2-8 for pin out).

USB-URI           NXU-2A

-------------          ------------

13 - Ground ----> 1,15 - Ground

22 - Output  ----> 6,14 - Input

21 - Audio In ---> 8 - Audio Out

No COR, and no PTT. Will the USB-URI still work? What Group ID will be generated? I'm using TL-Net to bridge two of these together. (The other USB-URI is connected to a GE MASTR III Base Station)