CIENA CORP, S-4, EX-23.2, 2001-01-03

CIENA CORP
S-4, EX-23.2, 2001-01-03
TELEPHONE & TELEGRAPH APPARATUS

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<PAGE>   1
                                  EXHIBIT 23.2


                       Consent of Deloitte & Touche LLP


     We consent to the use in this Registration Statement of CIENA Corporation
on Form S-4 of our report dated August 2, 2000 (December 18, 2000 as to Note 12)
related to the financial statements of Cyras Systems, Inc. appearing in the
Prospectus, which is part of this Registration Statement, and to the references
to us under the headings "Selected Historical Financial Data of Cyras,"
"Conditions Precedent to Obligations of CIENA," "Change in Independent
Auditors" and "Experts" in such Prospectus.


/s/ DELOITTE & TOUCHE LLP

San Jose, California

January 2, 2001