keley,
PLease see this XSF post.
https://forum.support.xerox.com/t5/Printing/Error-016-749/td-p/241061
You will need to engage your Sales Rep to obtain the PS Kit.
I hope this helps.
We just purchased the Vesalink C7100 and I am unable to print from it with My Mac OS (ventura 13.0.1). Each time I get a completed (Error) 016-749. How can I resolve this? Windows 10 pro prints fine.