EXHIBIT 23.3 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS We consent to the incorporation by reference in this Registration Statement on Form S-3 of Nx Networks, Inc. of our report dated February 11, 1998, except as to the segment information for the years ended December 31, 1997 and 1996 presented in Note 8, for which the date is March 26, 1999, on our audits of the consolidated financial statements of OpenROUTE Networks, Inc. as of December 31, 1997 and 1996, and for the two years ended December 31, 1997. We also consent to the reference to our firm under the caption "Experts." /s/ PricewaterhouseCoopers LLP Boston, Massachusetts January 15, 2001