Discord actually runs on a separate AIO I use as a fourth screen. I think there are two separate problems with Discord that conspire to run sequentially.
Last nights problem was PTT not working but the main problem when I can't even connect to voice is down to my ISP I guess. Their routing of the signal after it leaves my house must be fubar.
I can connect to other voice channels in Discord and every computer in my network behaves the same including the wired clients so unless my modem is acting very strange I have to put it down to my ISP.