Hanging Channels
Chris,
I was having the same problem with my 396T.
After some rereading of the firmware notes, it becomes apparent that this is not a "global" setting.
It has to be done for every single System File you have. If you have your radio set up like I do, you'll have several different System Files which you use to listen to different groups. Every System File needs to be changed. I had changed all but one System File and it constantly hung up.
The next time I see you at the fire house, I can explain it further. The notes that came with the firmware are not all that specific.
Jeff