I apologize for bumping such an old thread, but was this issue ever resolved? I too have three new-in-box VVX400 phones that were purchased on Amazon after being sold to Westcon by Polycom. None of the three phones will acquire an IP address on my network. I've switched to different networks as well as different switches and cables but cannot get an IP. The pass through switch on each of the phones works as desired.
Any help or guidance would be greatly appreciated.
Alan