Thank you for using the Support Forum. We don't have a Phaser B400 that i am aware of here in North America. We have a VersaLink B400. If that is the printer you have, please follow the instructions unable to print over the network found in this article from the online knowledgebase for the VersaLink B400. If this does not help please consider contacting your support centre for further assistance.
Thanks, CherylO-Xerox Community Manager
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