UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
( ) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
   SRB Associates V, L.P. 
   c/o Sevin Rosen Fund V L.P.
   Two Galleria Tower
   13455 Noel Road, Suite 1670
   Dallas, TX  75240
2. Issuer Name and Ticker or Trading Symbol
   CIENA Corporation
   ("CIEN")
3. IRS or Social Security Number of Reporting Person (Voluntary)
   
4. Statement for Month/Year
   May 1997
5. If Amendment, Date of Original (Month/Year)
   June 10, 1997
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   ( ) Director (X) 10% Owner ( ) Officer (give title below) ( ) Other
   (specify below)
   
7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person
___________________________________________________________________________________________________________________________________ Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned | ___________________________________________________________________________________________________________________________________| 1. Title of Security |2. |3. |4.Securities Acquired (A) |5.Amount of |6.Dir |7.Nature of Indirect | | Transaction | or Disposed of (D) | Securities |ect | Beneficial Ownership | | | | | Beneficially |(D)or | | | | | | | A/| | Owned at |Indir | | | Date |Code|V| Amount | D | Price | End of Month |ect(I)| | ___________________________________________________________________________________________________________________________________| Common Stock |5/27/9|J(1)| |1,108,183 |D | |9,973,647 |I |By Sevin Rosen Fund IV L.P.| |7 | | | | | | | | (2) | - - -----------------------------------------------------------------------------------------------------------------------------------| Common Stock |5/27/9|J(3)| |71,429 |D | |642,856 |I |By Sevin Rosen Fund V L.P. | |7 | | | | | | | |(2) | - - -----------------------------------------------------------------------------------------------------------------------------------| ___________________________________________________________________________________________________________________________________| ___________________________________________________________________________________________________________________________________ Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned | ___________________________________________________________________________________________________________________________________| 1.Title of Derivative |2.Con- |3. |4. |5.Number of De |6.Date Exer|7.Title and Amount |8.Price|9.Number |10.|11.Nature of| Security |version |Transaction | rivative Secu |cisable and| of Underlying |of Deri|of Deriva |Dir|Indirect | |or Exer | | | rities Acqui |Expiration | Securities |vative |tive |ect|Beneficial | |cise | | | red(A) or Dis |Date(Month/| |Secu |Securities |(D)|Ownership | |Price of| | | posed of(D) |Day/Year) | |rity |Benefi |or | | |Deriva- | | | |Date |Expir| | |ficially |Ind| | |tive | | | | A/|Exer-|ation| Title and Number | |Owned at |ire| | |Secu- | | | | | D |cisa-|Date | of Shares | |End of |ct | | |rity |Date |Code|V| Amount | |ble | | | |Month |(I)| | ___________________________________________________________________________________________________________________________________| | | | | | | | | | | | | | | | ___________________________________________________________________________________________________________________________________|
Explanation of Responses: (1) Distribution by Sevin Rosen Fund IV L.P. to its partners. (2) SRB Associates V L.P. is the general partner of Sevin Rosen Fund V L.P. and an affiliate of Sevin Rosen Fund IV L.P. and may be deemed to beneficially own the shares held by such entity. (3) Distribution by Sevin Rosen Fund V L.P. to its partners. SIGNATURE OF REPORTING PERSON /s/ John V. Jaggers, General Partner DATE October 7, 1997