Ran OS10.13 on macbook pro 2013 on both wireless and wired connections no problems.
"Upgraded" to OS10.14.6 mojave.
Wireless connection lost, though both printer & mac connected to wifi network.
WIred connection will only send fax command from mac.
Have done all usual things (in no particular order): - reboots - remove & reinstall wired connection on mac - (re)installed all available Xerox drivers - reset mac printer driver - attempted wireless connection to printer's IP address