We just had one on a job and it never connected TCP/IP client, could get to it on a web browser just fine, control through web browser just fine, just not with Crestron CP3, wired to rs232 and all worked fine, left it that way for this application, and after reading other issues here, I chalked it up to something that wouldn't get fixed anytime soon

?all our Marantz jobs have been fine with Crestron, sometimes needing a power cycle, including my own home, to stay connected

6s+, please excuse typos.