We have a location with 4 printers all running on wifi. Until recently they were all working fine. We needed to add a couple VOIP phones to our sonicwall. After this our HP T120 started only printing half a page and then having an error. at the same time our Epson WF 4630 started doing the same thing. I rebooted the computers, rebooted the printers, power cycled the printers, re installed the drivers and set over tcp/ip connection, contacted support, etc etc.. I am at a loss for what to do and "business" is down at that location. I even set each printers up with static IP's just to see. I assume it had something to do with adding the VOIP phones and how they communicate over the network.