Hi, this is my first time posting here as I'm desperate to find answer. So this is the problem I'm facing. Short description - In an office environment, we have our own domain. Connected a PC to one particular Lanpoint name A connected to switch and IP Phone to Lanpoint name B which connected to PoE switch. PC and IP Phone have different IP address PC is 192.1xx.xxx.xxx and IP Phone is 10.1xx.xxx.xxx My problem is I have "ip configuration not valid" error on the PC. Here is what I did. -Try to swab A and B on the desk faceplate and also swap the cable in the server between switches with the same result. -Did all I can find in the forum regarding "ip configuration not valid" error I can find, with no solution. (renew ip config, flush dns, static IP, netsh winsock reset etc) -Purchase a new network adapter because I thought that the in build adapter is not working. Same problem. -Connect the problem desktop to another lanpoint faceplate and it's working fine. (I didn't think of this before purchasing a network adapter. Money wasted ) -Connect another working desktop to the problem lanpoint and it can't detect any network. -Change LAN cable for the PC So I would like to know what is the problem I'm facing. IP Phone is working well but there's no network detected using PC. Is it the wiring or is there smtg I missed out?