I saw your other similar post and it sounds like an issue with your driver that communicates with your Russound system. Telnet connections usually remain connected after they are initialized so if that connection is broken then issues arise. I don’t own a Russound but will say most telnet based drivers have an initialize command that resets the connection and reconnects. Have you tried that?
I have telnet working for 3 devices and my Denon AVR is the most problematic because that receiver only allows a single telnet connection at one time. The other 2 will remain working when the Denon AVRs connection is down. I bring this up because you don’t have to reset the hubs telnet capability, it’s just the connection for an individual device.