Exhibit 23.2

                       CONSENT OF INDEPENDENT ACCOUNTANTS

   We hereby consent to the use in this Registration Statement on Amendment No.
1 to Form S-4 of Sycamore Networks, Inc. of our report dated August 23, 1999,
except for the information presented in the fourth paragraph of Note 6 for
which the date is February 11, 2000, relating to the financial statements of
Sycamore Networks, Inc., which appears in such Registration Statement. We also
consent to the references to us under the headings "Experts" and "Selected
Financial Data" in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

August 11, 2000