[arm-allstar] Second USB Rim-LIte Causes the new one to not pass audio.

[ARM Allstar]

  I'm running a Pi3B with the latest fully upgraded version of HamVOIP.

I followed the steps in the guide to add a second USB FOB. Both are USB-RIM
Lites.  I was able to add the second RIM-Lite and set up my second node
number. The second USB RIM-Lite worked for audio receive, and can PTT just
fine. So I know the edits of my iax and rpt and simple usb config files are
all correct.  However, when the second RIM-Lite is connected, no audio
passes to the mic input of the second radio, no voice, no tones. just a
carrier when it is keyed.  Both will work just fine when one is connected
at a time. For a test, I disconnected the second RIM-LIte,  connected my
second harness and radio to the first RIM-Lite and everythng worked fine,
PTT, Audio is passed, the COR worked, everything.  I even created a whole
new setup on a seperate Pi and confirmed that the Rim-Lite works on that
one as well.  So I know for certain that the RIM-Lite works, the cable is
wired correctly, and the radio works.

I also noticed on the DVSwitch mobile app that when the second RIM-Lite was
connected the audio suffered harshly from the first RIM-Lite, it was
cutting in and out, very choppy, and as soon as I disconnected the second
one, the audio on the first returned to normal. I also had someone
connected through EchoLink and they said the same thing, choppy audio.

I also tried setting up the second RIM-Lite on a different port, again
following the instructions to stop asterisk connect, start asterisk and use
the Asterisk CLI again to activate and tune.  Same results as before. No
audio is passed and the first RIM-Lite had degraded audio.

Is this a power issue?  Should I try using a powered USB hub?  Nothing else
is connected to the origianal Pi besides the RIM-Lites.  Too much power
draw is my only guess.  The power supply I'm using is outputting 5V 3A.

I appreciate everyones thoughts or ideas as I'd really like to use the same
Pi for both RIM-Lites.

Mike
WG5EEK