CIENA CORP
10-Q, 1998-09-14
TELEPHONE & TELEGRAPH APPARATUS
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<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 10-Q
(Mark one)
( X ) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
               THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED JULY 31, 1998

                                       OR

(   )  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM..................TO.........................

COMMISSION FILE NUMBER: 0-21969

                                CIENA CORPORATION
             (Exact name of registrant as specified in its charter)

          DELAWARE                                      23-2725311
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

1201 WINTERSON ROAD, LINTHICUM, MD                        21090
(Address of Principal Executive Offices)                (Zip Code)

                                 (410) 865-8500
              (Registrant's telephone number, including area code)


             (Former name, former address and former fiscal year, if
                           changed since last report)

           Indicate by check mark whether the registrant: (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. YES (X) NO ( )


           Indicate the number of shares outstanding of each of the issuer's
classes of common stock, as of the latest practicable date:

             CLASS                            OUTSTANDING AT SEPTEMBER  14, 1998
- --------------------------------              ----------------------------------
  Common stock. $.01 par value                           102,969,703

                               Page 1 of 25 pages




<PAGE>   2

                                CIENA CORPORATION

                                      INDEX

                                    FORM 10-Q

<TABLE>
<CAPTION>
                                                                                 PAGE NUMBER
<S>                                                                              <C>
PART I - FINANCIAL INFORMATION

Item 1.     Financial Statements

            Consolidated Statements of Operations
            Quarters and nine months ended July 31, 1997
            and July 31, 1998                                                         3

            Consolidated Balance Sheets
            October 31, 1997 and July 31, 1998                                        4

            Consolidated Statements of Cash Flows
            Nine months ended July 31, 1997 and
            July 31, 1998                                                             5

            Notes to Consolidated Financial Statements                                6

Item 2.     Management's Discussion and Analysis of
            Financial Condition and Results of
            Operations                                                                11

Item 3.     Quantitative and Qualitative Disclosure About
            Market Risk - Not applicable

PART II - OTHER INFORMATION

Item 1.     Legal Proceedings                                                         23

Item 6.     Exhibits and Reports on Form 8-K                                          24

Signatures                                                                            25
</TABLE>






                                       2
<PAGE>   3

ITEM 1. FINANCIAL STATEMENTS

                               CIENA CORPORATION

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                  (UNAUDITED)

<TABLE>
<CAPTION>

                                                           Quarter Ended                            Nine Months Ended
                                                  --------------------------------         ----------------------------------
                                                    July 31,            July 31,             July 31,              July 31,
                                                      1997                1998                 1997                  1998
                                                  ------------        ------------         ------------          ------------

<S>                                               <C>                 <C>                  <C>                   <C>
Revenue                                               $121,845            $129,116             $283,121              $416,926
Cost of goods sold                                      47,569              70,431              116,222               193,326
                                                  ------------        ------------         ------------          ------------
  Gross profit                                          74,276              58,685              166,899               223,600
                                                  ------------        ------------         ------------          ------------

Operating expenses:
  Research and development                               7,245              18,805               14,994                45,656
  Selling and marketing                                  6,722              12,526               14,738                33,538
  General and administrative                             3,241               3,908                8,041                12,148
  Purchased research and development                         -                   -                    -                 9,503
  Pirelli litigation                                         -              20,579                5,000                30,579
  Merger costs                                               -               2,017                    -                 2,017
                                                  ------------        ------------         ------------          ------------
      Total operating expenses                          17,208              57,835               42,773               133,441
                                                  ------------        ------------         ------------          ------------

Income from operations                                  57,068                 850              124,126                90,159

Interest and other income, net                           1,511               2,577                3,893                 9,783

Interest expense                                           (85)                (58)                (319)                 (223)
                                                  ------------        ------------         ------------          ------------

Income before income taxes                              58,494               3,369              127,700                99,719

Provision for income taxes                              22,770               1,280               49,641                42,627
                                                  ------------        ------------         ------------          ------------

Net income                                            $ 35,724            $  2,089             $ 78,059              $ 57,092
                                                  ============        ============         ============          ============

Basic net income per common share                     $   0.36            $   0.02             $   1.15              $   0.56
                                                  ============        ============         ============          ============

Diluted net income per common share and
    dilutive potential common share                   $   0.34            $   0.02             $   0.75              $   0.53
                                                  ============        ============         ============          ============

Weighted average basic common shares
    outstanding                                         98,021             102,089               68,010               101,360
                                                  ============        ============         ============          ============

Weighted average basic common and dilutive
    potential common shares outstanding                106,296             108,215              103,705               107,775
                                                  ============        ============         ============          ============
</TABLE>




              The accompanying notes are an integral part of these
                       consolidated financial statements.


                                       3
<PAGE>   4


                               CIENA CORPORATION

                          CONSOLIDATED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)
                                  (UNAUDITED)


<TABLE>
<CAPTION>
                                                                            October 31,           July 31,
                                                                                1997                1998
                                                                            ------------        ------------
<S>                                                                         <C>                 <C>

                                            ASSETS
Current assets:
  Cash and cash equivalents                                                    $ 268,588           $ 193,486
  Marketable debt securities                                                           -              28,132
  Accounts receivable, net                                                        72,336             108,480
  Inventories, net                                                                41,109              76,343
  Deferred income taxes                                                            9,139               7,628
  Prepaid income taxes                                                                 -              20,499
  Prepaid expenses and other                                                       3,093              10,345
                                                                            ------------        ------------
    Total current assets                                                         394,265             444,913
Equipment, furniture and fixtures, net                                            67,618             125,260
Goodwill and other intangible assets, net                                              -              17,102
Other assets                                                                       1,396               3,960
                                                                            ------------        ------------
    Total assets                                                               $ 463,279           $ 591,235
                                                                            ============        ============

  LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                                                             $  24,760           $  42,767
  Accrued liabilities                                                             32,022              32,571
  Income taxes payable                                                               261                 943
  Deferred revenue                                                                 2,591                 192
  Other current obligations                                                        1,179                 893
                                                                            ------------        ------------
    Total current liabilities                                                     60,813              77,366
Deferred income taxes                                                             28,167              31,346
Other long-term obligations                                                        1,885               1,592
                                                                            ------------        ------------
    Total liabilities                                                             90,865             110,304
Commitments and contingencies                                                          -                   -
Stockholders' equity:
  Preferred stock - par value $.01; 20,000,000 shares authorized;
    zero shares issued and outstanding                                                 -                   -
  Common stock - par value $.01; 360,000,000 shares authorized;
    100,287,653 and 102,541,814 shares issued and outstanding                      1,003               1,025
  Additional paid-in capital                                                     245,219             296,951
  Notes receivable from stockholders                                                 (64)               (333)
  Translation adjustment                                                              (5)                (65)
  Retained earnings                                                              126,261             183,353
                                                                            ------------        ------------
    Total stockholders' equity                                                   372,414             480,931
                                                                            ------------        ------------
    Total liabilities and stockholders' equity                                 $ 463,279           $ 591,235
                                                                            ============        ============

</TABLE>


              The accompanying notes are an integral part of these
                       consolidated financial statements.


                                       4
<PAGE>   5


                                CIENA CORPORATION
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                                 (IN THOUSANDS)
                                   (UNAUDITED)


<TABLE>
<CAPTION>
                                                                                       Nine Months Ended July 31,
                                                                                 -------------------------------------

                                                                                     1997                     1998
                                                                                 ------------             ------------
<S>                                                                              <C>                      <C>
Cash flows from operating activities:
  Net income                                                                       $  78,059                $  57,092
   Adjustments to reconcile net income to net cash
      provided by operating activities:
         Non-cash charges from equity transactions                                        31                       31
         Amortization of premiums on marketable debt securities                            -                      362
         Effect of translation adjustments                                                (4)                     (60)
         Purchased research and development                                                -                    9,503
         Write down of leasehold improvements                                            571                        -
         Depreciation and amortization                                                 5,942                   22,850
         Provision for doubtful accounts                                                 200                      194
         Provision for inventory excess and obsolescence                               2,409                    4,116
         Provision for warranty and other contractual obligations                     11,587                    9,583
         Changes in assets and liabilities:
            Increase in accounts receivable                                          (40,375)                 (36,103)
            Increase in prepaid expenses and other                                      (207)                  (7,614)
            Increase in inventories                                                  (18,284)                 (39,350)
            Increase in prepaid income taxes                                               -                  (20,499)
            (Increase) decrease in deferred income tax asset                          (4,107)                   1,511
            Increase in other assets                                                    (141)                  (8,418)
            Increase in accounts payable and accruals                                 29,522                    7,957
            Increase in income taxes payable                                          15,801                      682
            Increase in deferred income tax liability                                      -                    3,179
            Decrease in deferred revenue and other obligations                          (570)                  (2,399)
                                                                                 ------------             ------------
         Net cash provided by operating activities                                    80,434                    2,617
                                                                                 ------------             ------------
Cash flows from investing activities:
   Additions to equipment, furniture and fixtures                                    (47,946)                 (77,572)
   Purchases of marketable debt securities                                                 -                  (90,008)
   Maturities of marketable debt securities                                                -                   61,876
   Net cash paid for business combination                                                  -                   (2,103)
                                                                                 ------------             ------------
         Net cash used in investing activities                                       (47,946)                (107,807)
                                                                                 ------------             ------------
Cash flows from financing activities:
   Repayment of other obligations                                                     (1,685)                    (579)
   Net proceeds from issuance of common stock                                        174,878                    5,127
   Tax benefit related to exercise of stock options and warrants                      17,560                   25,481
   Repayment of notes receivable from shareholders                                         -                       59
                                                                                 ------------             ------------
         Net cash provided by financing activities                                   190,753                   30,088
                                                                                 ------------             ------------
         Net increase (decrease) in cash and cash equivalents                        223,241                  (75,102)
Cash and cash equivalents at beginning of period                                      24,040                  268,588
                                                                                 ------------             ------------
Cash and cash equivalents at end of period                                         $ 247,281                $ 193,486
                                                                                 ============             ============

</TABLE>



              The accompanying notes are an integral part of these
                       consolidated financial statements.



                                       5
<PAGE>   6


                                CIENA CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (UNAUDITED)

(1) SIGNIFICANT ACCOUNTING POLICIES

Interim Financial Statements

           The interim financial statements included herein for CIENA
Corporation (the "Company") have been prepared by the Company, without audit,
pursuant to the rules and regulations of the Securities and Exchange Commission.
In the opinion of management, financial statements included in this report
reflect all normal recurring adjustments which the Company considers necessary
for the fair presentation of the results of operations for the interim periods
covered and of the financial position of the Company at the date of the interim
balance sheet. Certain information and footnote disclosures normally included in
the annual financial statements prepared in accordance with generally accepted
accounting principles have been condensed or omitted pursuant to such rules and
regulations. However, the Company believes that the disclosures are adequate to
understand the information presented. The operating results for interim periods
are not necessarily indicative of the operating results for the entire year.
These financial statements should be read in conjunction with the Company's
October 31, 1997 audited consolidated financial statements and notes thereto
included in the Company's Form 10-K annual report for the fiscal year ended
October 31, 1997, as restated in the Company's Form 8-K dated February 19, 1998.

           On June 3, 1998 the Company announced an agreement to merge with
Tellabs, Inc. ("Tellabs"), a Delaware corporation headquartered in Lisle,
Illinois. Tellabs designs, manufactures, markets and services voice and data
transport and network access systems. On August 28, 1998 the Company announced
that the Company and Tellabs had agreed to amend the agreement to reflect, among
other things, a change in the stock exchange ratios. Under the terms of the
amended merger agreement, all outstanding shares of CIENA stock were to have
been exchanged at the ratio of 0.8 shares of Tellabs common stock for each share
of CIENA common stock. An agreement to terminate the merger was reached on
September 13, 1998. See Item 2. "Management's Discussion and Analysis of
Financial Condition and Results of Operations." 

           As more fully described in Note 5, the Company acquired ATI Telecom
International Ltd., ("Alta") in February 1998. The acquisition was accounted for
as a pooling of interests, and the historical consolidated financial statements
of the Company for all periods prior to this acquisition have been restated to
include the financial position, results of operations and cash flows of Alta.

Revenue Recognition

           The Company recognizes product revenue in accordance with the
shipping terms specified. For transactions where the Company has yet to obtain
customer acceptance, revenue is deferred until the terms of acceptance are
satisfied. Revenue for installation services is recognized as the services are
performed unless the terms of the supply contract combine product acceptance
with installation, in which case revenues for installation services are
recognized when the terms of acceptance are satisfied and installation is
completed. Revenues from installation service fixed price contracts are
recognized on the percentage-of-completion method, measured by the percentage of
costs incurred to date compared to estimated total costs for each contract.
Amounts received in excess of revenue recognized are included as deferred
revenue in the accompanying balance sheets. For distributor sales where risks of
ownership have not transferred, the Company recognizes revenue when the product
is shipped through to the end user.

Marketable Debt Securities

           The Company has classified its investments in marketable debt
securities as held-to-maturity securities as defined by Statement of Financial
Accounting Standards No. 115, "Accounting for Certain Investments in Debt and
Equity Securities". Such investments are recorded at their amortized cost in the
accompanying consolidated balance sheets. As of July 31, 1998 all of the
marketable debt securities are corporate debt securities with contractual
maturities of six months or less.


                                       6
<PAGE>   7


Goodwill and Other Intangibles

           The Company's goodwill and other intangibles are the result of
external purchases of technology and goodwill and are recorded at the lower of
their cost or the fair market value disbursed in conjunction with the purchase.
The goodwill and other intangibles are amortized over the useful life of the
assets, determined by management to be between five and fourteen years, on a
straight-line basis. For the nine months ended July 31, 1998, the Company
recorded goodwill amortization of approximately $1,308,000, resulting in
accumulated amortization of $2,255,000 as of July 31, 1998.

Computation of Basic Net Income per Common Share and Diluted Net Income per
Common and Dilutive Potential Common Share

           The following is a reconciliation of the numerators and denominators
of the basic net income per common share ("basic EPS") and diluted net income
per common and dilutive potential common share ("diluted EPS"). Basic EPS is
computed using the weighted average number of common shares outstanding. Diluted
EPS is computed using the weighted average number of common shares outstanding,
stock options and warrants using the treasury stock method and shares issued
upon conversion of all outstanding shares of Mandatorily Redeemable Preferred
Stock. (in thousands except per share amounts)


<TABLE>
<CAPTION>
                                                                             For the Quarter Ended July 31, 1998
                                                             ---------------------------------------------------------------------
                                                                     Income                   Shares                Per Share
                                                                  (Numerator)              (Denominator)              Amount
                                                             -----------------------    --------------------     -----------------
<S>                                                          <C>                        <C>                      <C>
BASIC EPS
Income available to common stockholders                            $          2,089                 102,089           $       0.02
                                                                                                                 =================

EFFECT OF DILUTIVE SECURITIES
Stock options                                                                     -                   6,126
                                                             -----------------------    --------------------

DILUTED EPS
Income available to common stockholders +
  assumed conversions                                              $          2,089                 108,215           $       0.02
                                                             =======================    ====================     =================



<CAPTION>
                                                                                For the Quarter Ended July 31, 1997
                                                             ---------------------------------------------------------------------
                                                                     Income                   Shares                Per Share
                                                                  (Numerator)              (Denominator)              Amount
                                                             -----------------------    --------------------     -----------------
<S>                                                          <C>                        <C>                      <C>
BASIC EPS
Income available to
  common stockholders                                               $        35,724                  98,021           $       0.36
                                                                                                                 =================

EFFECT OF DILUTIVE SECURITIES
Stock options and warrants                                                        -                   8,275
                                                             -----------------------    --------------------

DILUTED EPS
Income available to common
  stockholders + assumed conversions                                $        35,724                 106,296           $       0.34
                                                             =======================    ====================     =================

</TABLE>


                                       7

<PAGE>   8


<TABLE>
<CAPTION>
                                                                               For Nine Months Ended July 31, 1998
                                                            ------------------------------------------------------------------------
                                                                  Income                     Shares                  Per Share
                                                                (Numerator)               (Denominator)               Amount
                                                            --------------------      ----------------------    --------------------
<S>                                                         <C>                       <C>                       <C>

BASIC EPS
Income available to
  common stockholders                                           $        57,092                     101,360        $           0.56
                                                                                                                ====================

EFFECT OF DILUTIVE SECURITIES
Stock options and warrants                                                    -                       6,415
                                                            --------------------      ----------------------

DILUTED EPS
Income available to common
  stockholders + assumed conversions                            $        57,092                     107,775        $           0.53
                                                            ====================      ======================    ====================




<CAPTION>
                                                                              For Nine Months Ended July 31, 1997
                                                            ------------------------------------------------------------------------
                                                                  Income                     Shares                  Per Share
                                                                (Numerator)               (Denominator)               Amount
                                                            --------------------      ----------------------    --------------------
<S>                                                         <C>                       <C>                       <C>
BASIC EPS
Income available to
  common stockholders                                           $        78,059                      68,010        $           1.15
                                                                                                                ====================

EFFECT OF DILUTIVE SECURITIES
Stock options and warrants                                                    -                       9,112
Conversion of Preferred Stock                                                 -                      26,583
                                                            --------------------      ----------------------

DILUTED EPS
Income available to common
  stockholders + assumed conversions                            $        78,059                     103,705        $           0.75
                                                            ====================      ======================    ====================
</TABLE>




           Stock options to purchase 92,850 and 440,450 shares of common stock
were outstanding during the quarter ended and nine months ended July 31, 1998,
respectively, but were not included in the computation of diluted EPS because
the options' exercise price was greater than the average market price of the
common shares.


                                       8

<PAGE>   9



(2) INVENTORIES

       Inventories are comprised of the following (in thousands):

<TABLE>
<CAPTION>

                                                              October 31,                July 31,
                                                                 1997                      1998
                                                          ------------------        -----------------
       <S>                                                <C>                       <C>
       Raw materials                                           $     27,716              $    44,608
       Work-in-process                                                5,679                    6,290
       Finished goods                                                15,180                   34,599
                                                          ------------------        -----------------
                                                                     48,575                   85,497
       Less reserve for excess and obsolescence                      (7,466)                  (9,154)
                                                          ------------------        -----------------
                                                               $     41,109              $    76,343
                                                          ==================        =================
</TABLE>



(3) EQUIPMENT, FURNITURE AND FIXTURES

     Equipment, furniture and fixtures are comprised of the following
     (in thousands):

<TABLE>
<CAPTION>

                                                             October 31,                July 31,
                                                                1997                      1998
                                                         ------------------         -----------------
     <S>                                                 <C>                        <C>
     Equipment, furniture and fixtures                      $       65,444            $      134,851
     Leasehold improvements                                         13,953                    22,542
                                                         ------------------         -----------------
                                                                    79,397                   157,393
     Accumulated depreciation and amortization                     (12,279)                  (33,383)
     Construction-in-progress                                          500                     1,250
                                                         ------------------         -----------------
                                                            $       67,618            $      125,260
                                                         ==================         =================
</TABLE>


(4) ACCRUED LIABILITIES - COMMITMENTS AND CONTINGENCIES

Litigation

           On June 1, 1998, the Company announced the resolution of all pending
litigation with Pirelli. The terms of the settlement involved the dismissal of
Pirelli's three lawsuits against the Company that were pending in Delaware,
dismissal of the Company's legal proceedings against Pirelli in the United
States International Trade Commission, payment to Pirelli of $30.0 million and
certain running royalties due to Pirelli, a worldwide, non-exclusive
cross-license to each party's patent portfolios, and a 5-year moratorium on
future litigation between the parties. The payment of future royalties due to
Pirelli is based upon future revenues derived from the licensed technology. The
Company does not expect the future royalty payments to have a material impact on
the Company's business, financial condition and or results of operations. See
Part II, Item 1, "Legal Proceedings".

Accrued Liabilities

        Accrued liabilities are comprised of the following (in thousands):

<TABLE>
<CAPTION>

                                                                               October 31,            July 31,
                                                                                  1997                  1998
                                                                            -----------------     -----------------
        <S>                                                                 <C>                   <C>
        Warranty and other contractual obligations                             $       12,205        $       15,363
        Accrued compensation                                                            8,284                11,105
        Legal and related costs                                                         4,577                   409
        Consulting and outside services                                                 3,219                 2,006
        Unbilled construction-in-process and leasehold improvements                     1,427                   911
        Other                                                                           2,310                 2,777
                                                                            -----------------     -----------------
                                                                               $       32,022        $       32,571
                                                                            =================     =================
</TABLE>

                                       9

<PAGE>   10


(5) ACQUISITIONS

Astracom

           During December 1997 the Company completed an Agreement and Plan of
Merger with Astracom, Inc. ("Astracom"), an early stage telecommunications
company located in Atlanta, Georgia. The purchase price was approximately $13.1
million and consisted of the issuance of 169,754 shares of CIENA common stock,
the payment of $2.4 million in cash, and the assumption of certain stock
options. The transaction was recorded using the purchase accounting method with
the purchase price representing approximately $11.4 million in goodwill and
other intangibles, and approximately $1.7 million in net assets assumed. The
amortization period for the intangibles, based on management's estimate of the
useful life of the acquired technology, is five years. The operations of
Astracom are not material to the consolidated financial statements of the
Company, and accordingly, separate pro forma financial information has not been
presented.

ATI Telecom

           On February 19, 1998, the Company acquired ATI Telecom International
Ltd., ("Alta"), a Canadian corporation headquartered in Norcross, Georgia, in a
transaction valued at approximately $52.5 million. Alta provides a range of
engineering, furnishing and installation services for telecommunications service
providers in the areas of transport, switching and wireless communications.
Under the terms of the agreement, the Company acquired all of the outstanding
shares of Alta in exchange for 1,000,000 shares of CIENA common stock. The
transaction was accounted for as a pooling of interests. The historical
consolidated financial results of CIENA for prior periods have been restated to
include the financial position and results of operations of Alta.

           The following table shows the separate historical results of CIENA
and Alta for the periods prior to the consummation of the merger of the two
entities:

(in thousands)

<TABLE>
<CAPTION>
                                                                                                                Quarter
                                                                                                                 Ended
                                                               Year Ended October 31,                         January 31,
                                                    1995                 1996               1997                 1998
                                               -----------------------------------------------------------------------------

<S>                                            <C>                  <C>                <C>                 <C>
Revenues:
  CIENA                                             $       -           $   54,838        $   373,827           $   134,267
  Alta                                                 21,691               33,625             39,531                11,349
  Intercompany eliminations                                 -                    -               (143)                 (524)
                                               ---------------      --------------     ---------------     -----------------
Consolidated total, as restated                     $  21,691           $   88,463        $   413,215           $   145,092
                                               ===============      ==============     ===============     =================

Net Income (loss):
  CIENA                                             $  (7,629)          $   14,718        $   112,945           $    39,768
  Alta                                                  1,181                2,545              3,022                   (70)
                                               ---------------      --------------     ---------------     -----------------
Consolidated total, as restated                     $  (6,448)          $   17,263        $   115,967           $    39,698
                                               ===============      ==============     ===============     =================
</TABLE>


Terabit

           During April 1998 the Company completed an Agreement and Plan of
Reorganization with Terabit Technology, Inc. ("Terabit"), a developer of optical
components known as photodetector or optical receivers. Terabit is located in
Santa Barbara, California. The purchase price was approximately $11.5 million
and consisted of the issuance of 134,390 shares of CIENA common stock, the
payment of $1.1 million in cash, and the assumption of certain stock options.
The transaction was recorded using the purchase accounting method with the
purchase price representing approximately $9.5 million in purchased research and
development, $1.8 million in goodwill and other intangibles, and approximately
$0.2 million in net assets assumed. The amortization period for the intangibles,
based on management's estimate of the useful life of the acquired technology, is
five years. The operations of Terabit are not material to the consolidated
financial statements of the Company, and accordingly, separate pro forma
financial information has not been presented.


                                       10

<PAGE>   11


ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
        RESULTS OF OPERATIONS

           This Management's Discussion and Analysis of Financial Condition and
Results of Operations contains certain forward-looking statements that involve
risks and uncertainties. The Company has set forth in Form 10-K Item 7
"Management's Discussion and Analysis of Financial Condition and Results of
Operations-Risk Factors," as filed with the Securities and Exchange Commission
on December 10, 1997, and in a Form 8-K filed on December 29, 1997, a detailed
statement of risks and uncertainties relating to the Company's business. In
addition, set forth below under the heading "Risk Factors" is a further
discussion of certain of those risks as they relate to the period covered by
this report, the Company's near term outlook with respect thereto, and the
forward-looking statements set forth herein; however, the absence in this
quarterly report of a complete recitation of or update to all risk factors
identified in the Form 8-K or Form 10-K should not be interpreted as modifying
or superseding any such risk factor, except to the extent set forth below.
Investors should review this quarterly report in combination with the Form 8-K
and Form 10-K in order to have a more complete understanding of the principal
risks associated with an investment in the Company's Common Stock.

           On June 3, 1998 the Company announced an agreement to merge with
Tellabs, Inc. ("Tellabs"), a Delaware corporation headquartered in Lisle,
Illinois. Tellabs designs, manufactures, markets and services voice and data
transport network access systems. Under the terms of the original agreement, all
outstanding shares of CIENA stock were to have been exchanged at the ratio of
one share of Tellabs common stock for each share of CIENA common stock. On
August 21, 1998 the Company was informed by AT&T Corporation ("AT&T") that AT&T
had decided not to pursue further evaluation of CIENA's dense wavelength
division multiplexing ("DWDM") systems. Following the impact of the AT&T
decision on the market prices of the respective companies, the Company and
Tellabs management renegotiated the terms of the merger agreement, and on August
28, 1998 announced an amendment to the original merger agreement which was
approved by the respective company's boards of directors. Under the terms of the
agreement as amended, all outstanding shares of CIENA stock were to have been
exchanged at the ratio of 0.8 share of Tellabs common stock for each share of
CIENA common stock. Subsequent to August 28, 1998, further adverse investor
reaction to events of the last several weeks raised serious questions about the
ultimate ablity to obtain shareholder approval for the merger, which made it
difficult to move forward with the kind of momentum needed to realize
shareholder value.  An agreement to terminate the merger was reached on
September 13, 1998.

OVERVIEW AND OUTLOOK

           CIENA Corporation is a leading supplier of DWDM systems for
fiberoptic communications networks. CIENA's DWDM systems alleviate capacity
constraints and enable flexible provisioning of additional bandwidth on
high-traffic routes in carriers' networks.

           In the face of the stock market's reaction to the Company's August
14, 1998 announcement of preliminary results for the third fiscal quarter of
1998, and to better assess for itself the appropriate reaction to these results
in relation to the Company's business plan and business prospects, for
approximately two weeks after the August 14 announcement, certain senior
management officials traveled to meet in person with certain of the Company's
key customers and potential customers. The Company believes it appropriate to
share those observations and impressions with investors in this report. While
these observations contain forward-looking statements that must be understood in
light of the Company's detailed discussion of the risks facing it (see the
discussion of "Risk Factors" appearing later in this report), the Company
believes these statements and observations will be helpful to investors in
gaining a clearer picture of the Company's position and prospects.

1.   The basic market driver for the Company's business is demand for bandwidth
     in fiberoptic communications networks. Based on the level of new carrier
     activity, and new proposals and ongoing customer discussions worldwide, the
     Company believes the basic market driver remains very strong.

2.   The carriers' needs to deliver more bandwidth to end users--whether through
     evolution of voice-centric network architectures or through revolutionary
     shifts to new data-centric architectures--favor the utilization of optical
     communications technologies, such as those for which the Company is known.

3.   Through the first three quarters of fiscal 1998, the Company achieved in
     excess of 45% revenue growth over the same period of fiscal 1997. This
     revenue growth has been achieved almost entirely from sales of its products
     for long distance applications; has occurred despite minimal or no
     purchases from the three (soon to be two) long distance networks which by
     industry estimates hold in excess of 80% of the U.S. long distance market
     (AT&T, MCI and WorldCom); and represents shipments to eleven customers, as
     compared to only four in fiscal 1997. The Company believes these facts are
     indicators of (1) strong demand for bandwidth, (2) the level of seriousness
     with which new carrier entrants are pursuing network buildouts and
     expansion in the U.S. and worldwide.


                                       11
<PAGE>   12

4.   The Company comfortably estimates that it has over one million channel
     miles of its long distance DWDM systems operating in live traffic
     deployments in seven different networks, and with what it believes is an
     outstanding record of reliability. The Company is not aware of any
     competing DWDM supplier which has even a 16 channel system fully
     operational and carrying live traffic; and is not aware of any competitor
     which can currently equal the Company's DWDM manufacturing capacity and
     volume delivery capability.

5.   The gross margin pressure evident in the Company's third quarter in part
     reflects the building of the Company's manufacturing capacity to
     accommodate production requirements higher than were experienced in this
     quarter. However, this capacity gives the Company the competitive advantage
     of responsive, near term, high volume delivery capability. The Company
     desires to preserve that advantage. The Company believes the recent gross
     margin pressure is also a reflection of the aggressive pricing approaches
     and other actions the long entrenched telecom equipment suppliers are
     willing to take in order to obtain market share in the DWDM market. The
     Company believes use of these aggressive tactics and other actions targeted
     at CIENA is itself evidence that (1) the DWDM market is large and important
     to network equipment vendors, and (2) CIENA is a recognized market
     leader.

     The Company believes it is positioned well in a strategically important
technology and product sector for the future of fiberoptic communications
networks. But this sector--if understood as being defined by communications
systems and products which increase capacity not incrementally but by orders of
magnitude by comparison to existing solutions--appears very much to be still in
its nascent stages, although it has the full attention of the long entrenched
telecom equipment vendors. Additionally, the potential customer base for such
systems and products is currently transforming from four dominant long distance
carriers (when the Company got started), to many new entrants (including for
this purpose new competitive thrusts by established carriers such as the RBOCs)
targeting some or all of a network's traditional segments--long distance, local
exchange, access, and, ultimately, the enterprise/user itself.

           The Company believes these key observations of major change: an
important business sector in its nascent stages; a sector in which the
entrenched telecom equipment vendors must participate effectively for their
continued growth; and a customer environment characterized by considerable
activity by new entrants--further underscore that the Company's results will
likely continue to show significant quarter to quarter fluctuation on the top
and bottom lines. They also present what management believes is a business
opportunity geared well to an entrepreneurial, fast-moving, customer-responsive
culture. The Company believes it has the culture to capitalize on this
opportunity, but doing so is not without significant risks. See "Risk Factors".

           Should the Company's near term results reflect further flatness or
declines in revenue and net income, both of which are very possible given the
current market environment and the continuing risks of the business, the
Company's stock price could face further volatility and downward pressure. At
the present time, the Company expects materially lower revenue and operating
results for the fourth fiscal quarter of 1998. See "Risk Factors". The Company
believes, however, that the right course over the next several quarters is to
stay the course in terms of maintaining the production capacity and delivery
capability which give the Company a key competitive advantage in this nascent
but high-growth-potential industry. The Company also believes that until timely
delivery of high volume equipment requirements and high quality customer service
and support are demonstrated by its competitors, the Company intends a measured
and gradual response to the pricing pressure created by competitors seeking to
acquire market share. The Company therefore intends to stay with this course,
even if near term operating performance, as measured by fluctuating revenues,
gross margins and earnings per share, suffers relative to analysts expectations.

HIGHLIGHTS OF THE QUARTER AND NINE MONTHS ENDED JULY 31, 1998

           From December 1996 until June 1998 the Company was involved in
litigation with Pirelli. On June 1, 1998, the Company announced the resolution
of all pending litigation with Pirelli. The terms of the settlement involved the
dismissal of Pirelli's three lawsuits against the Company that were pending in
Delaware, dismissal of the Company's legal proceedings against Pirelli in the
United States International Trade Commission, payment to Pirelli of $30.0
million and certain running royalties due to Pirelli, a worldwide, non-exclusive
cross-license to each party's patent portfolios, and a 5-year moratorium on
future litigation between the parties. The Company recorded a charge of
approximately $20.6 million and $30.6 million for the quarter and nine months
ended July 31, 1998, respectively, relating to legal fees and the ultimate
settlement to Pirelli. The payment of future royalties due to Pirelli is based
upon future revenues derived from the licensed technology. The Company does not
expect the future royalty payments to have a material impact on the Company's
business, financial condition and or results of operations See Part II, Item 1
"Legal Proceedings".

           In February 1998 the Company completed its acquisition of Alta, a
provider of telecommunications engineering, furnishing and installation
services, located in Norcross, Georgia. The addition of Alta provides the
Company with the installation experience and extensive field support capability
required to assist customers with equipment deployment. See Note 5 of Notes to
Consolidated Financial Statements.

           Revenues for the nine months ended July 31, 1998 of $416.9 million
were largely the result of MultiWave Sentry(TM)("Sentry"), Multiwave 4000
("4000"), and Multiwave 1600 ("1600") systems sales to Sprint Corporation
("Sprint").

                                       12
<PAGE>   13

The Company also recognized revenues from 1600 sales to LDDS WorldCom
("WorldCom"). Substantially all of the revenue recognized from the sales to
WorldCom occurred in the Company's first quarter ended January 31, 1998. During
the nine months ended July 31, 1998 the Company received initial product
acceptance and revenue recognition for Sentry systems supplied to Cable and
Wireless Communications Group ("Cable and Wireless"). Additionally, during the
nine months ended July 31, 1998 the Company signed a one-year exclusive contract
with Hermes Europe Railtel ("Hermes") to supply the 4000 system. Deployment and
revenue recognition for the Hermes sales occurred in the Company's third quarter
ended July 31, 1998 with additional deployments expected during the fourth
quarter of fiscal 1998. Also during the nine months ended July 31, 1998 the
Company recognized revenue from sales of 4000 systems to Digital Teleport, Inc.
("DTI"), GST Telecommunications, Inc. ("GST") and through the Company's
distributor, NISSHO Electronics Corporation ("NISSHO"), sales of Sentry and 4000
systems to Teleway Japan Corporation ("Teleway"), Japan Telecom Co., Ltd ("Japan
Telecom") and to Daini Deuden Inc. of Japan ("DDI"). Revenue recognition for
certain of the Cable and Wireless, Hermes, Teleway and Japan Telecom shipments
had been previously deferred until completion of initial field testing and
product acceptance. Revenues for the nine months ended July 31, 1998 also
included the Company's initial product acceptance and revenue recognition from
1600 systems sales to GST. Revenues received from GST represent the Company's
first sales in the competitive local exchange carrier ("CLEC") market.

           In March 1998 the Company announced an agreement to supply Bell
Atlantic with DWDM optical transmission systems. The supply agreement has no
minimum purchase commitments and includes the Company's 1600, Sentry and Firefly
systems. Deployment and revenue recognition is expected in the second half of
calendar 1998, subject to successful completion of ongoing testing. The Bell
Atlantic DWDM deployment is expected to mark the first time a regional Bell
operating company ("RBOC") has committed to deployment of DWDM equipment. See
"Risk Factors".

           In June 1998 the Company announced an agreement to supply Sentry and
Firefly DWDM systems to Racal Telecom, one of Europe's leading providers of
managed network services. Deployment began in June 1998 with revenue recognition
expected in the second half of calendar 1998, subject to successful completion
of field testing. In June 1998 the Company also announced that it had signed,
jointly with CS telecom France, a five year contract with Telecom Development
("TD") of France to supply Sentry and Firefly DWDM systems for immediate
deployment. Deployment began in June 1998 for the first route supporting TD's
Paris to Lyon link with revenue recognition expected in the second half of
calendar 1998, subject to successful completion of installation and field
testing. See "Risk Factors".

           In June 1998 at the SUPERCOMM trade show in Atlanta, Georgia, the
Company demonstrated its' Multiwave Metro(TM) ("Metro") DWDM system for
metropolitan and local access applications. Metro enables carriers to offer
multi-protocol high-bandwidth services economically using their existing network
infrastructure. The Metro product is expected to be commercially available by
the first quarter of calendar 1999. The Company also demonstrated at the
SUPERCOM trade show a 96 channel DWDM system. The 96 channel DWDM system is
expected to be commercially available during the first half of calendar 1999.
See "Risk Factors".

            In August 1998 AT&T indicated to the Company that capacity
requirements of its network had grown to such extent that the delays in final
certification and approval for deployment of the Company's customized 16 channel
system would make actual deployment of that system inadvisable, and that AT&T
would accordingly shift to an accelerated evaluation of commercially available,
higher channel count systems. The Company believed AT&T would evaluate the
Company's MultiWave(R) 4000 system positively in this context, particularly
because the Company believes it is the only manufacturer in the world with
operational 40 channel systems ready for prompt delivery on an "off-the -shelf"
basis in substantial manufacturing volumes. However, on August 21, 1998 the
Company was informed by AT&T that AT&T had decided not to pursue further
evaluation of CIENA's DWDM systems.

           During the first quarter of 1998 the Company continued its effort to
expand its manufacturing capabilities by leasing an additional facility of
approximately 35,000 square feet located in the Linthicum, Maryland area. This
facility is used for manufacturing and customer service activities. In April
1998 the Company leased an additional manufacturing facility in the Linthicum
area of approximately 57,000 square feet. With the addition of this new facility
the Company has a total of four facilities with approximately 192,500 square
feet that can be used for manufacturing operations. In April 1998 the Company
completed the transfer of its principal executive, sales, and marketing
functions located in Linthicum in a portion of its 96,000 square foot facility
to an approximately 67,000 square foot facility also located in Linthicum.
During the third quarter of 1998, the Company completed the process of
renovating the vacated portions of the 96,000 square foot facility for the
purpose of accommodating expanding research and development functions.

           As of July 31, 1998 the Company employed 1,366 persons, which
includes 222 persons as a result of the Company's acquisition of Alta. This was
an increase of 525 persons over the 841 persons employed on October 31, 1997.


                                       13
<PAGE>   14



RESULTS OF OPERATIONS

     THREE MONTHS ENDED JULY 31, 1997 COMPARED TO THREE MONTHS ENDED JULY 31,
     1998

           REVENUE. The Company recognized $121.8 million and $129.1 million in
     revenue for the third quarters ended July 31, 1997 and 1998, respectively.
     The approximate $7.3 million or 6.0% increase in revenues in the third
     quarter 1998 compared to the third quarter 1997 was the result of increased
     sales to Sprint and sales to new customers, offset by a substantial decline
     in sales to WorldCom. The Company recognized DWDM systems revenue from two
     and eleven customers, respectively, during quarters ended July 31, 1997 and
     1998. A majority of the revenues in the Company's third quarter 1998 was 
     attributed to sales of the Company's 4000 system, the Company's 40 channel
     version of the Sentry product, which was not available for sale in the
     third quarter of 1997. The Company also believes the anticipated change to
     calendar quarter reporting in connection with the planned merger with
     Tellabs resulted in some shifting of orders out of the fiscal third
     quarter.

           GROSS PROFIT. Gross profits were $74.3 million and $58.7 million for
     the third quarters ended July 31, 1997 and 1998, respectively. Gross margin
     as a percentage of revenues was 61.0% and 45.5% for the third quarters 1997
     and 1998, respectively. The approximate $15.6 million or 21% decrease in
     gross profit in the third quarter 1998 compared to the third quarter 1997,
     was generally the result of lower system selling prices and under absorbed
     higher manufacturing costs in the third quarter 1998 compared to third
     quarter 1997, but was also impacted specifically by price concessions
     offered to a large customer in return for volume commitments. The customer
     mix in a given quarter can significantly impact gross margins.

           RESEARCH AND DEVELOPMENT EXPENSES. Research and development expenses
     were $7.2 million and $18.8 million for the third quarters ended July 31,
     1997 and 1998, respectively. During the third quarters 1997 and 1998,
     research and development expenses were 6.0% and 14.6% of revenue,
     respectively. The approximate $11.6 million or 160% increase in research
     and development expenses in the third quarter 1998 compared to the third
     quarter 1997 was the result of increases in staffing levels, consumption of
     prototype materials, write-off certain prototype parts, utilization of
     outside consultants for certain development efforts and higher costs of
     test equipment used to develop and test new products and features. The
     Company expenses research and development costs as incurred.

           SELLING AND MARKETING EXPENSES. Selling and marketing expenses were
     $6.7 million and $12.5 million for the third quarters ended July 31, 1997
     and 1998, respectively. During the third quarters 1997 and 1998, selling
     and marketing expenses were 5.5% and 9.7% of revenue, respectively. The
     approximate $5.8 million or 86% increase in selling and marketing expenses
     in the third quarter 1998 compared to the third quarter 1997 was primarily
     the result of increased staffing levels in the areas of sales, technical
     assistance and field support, and increases in trade show participation,
     promotional costs, travel expenditures and rent expense.

           GENERAL AND ADMINISTRATIVE EXPENSES. General and administrative
     expenses were $3.2 million and $3.9 million for the third quarters ended
     July 31, 1997 and 1998, respectively. During the third quarters 1997 and
     1998, general and administrative expenses were 2.7% and 3.0% of revenue,
     respectively. The approximate $0.7 million or 21% increase in general and
     administrative expenses from the third quarter 1997 compared to the third
     quarter 1998 was primarily due to increased staffing levels and outside
     consulting services.

           PIRELLI LITIGATION. The Pirelli litigation charge of $20.6 million in
     the third quarter 1998 was attributable to a $30.0 million payment made to
     Pirelli during third quarter 1998 and to additional other legal and related
     costs incurred in connection with the settlement of this litigation. These
     charges were partially offset by accrued legal and related cost associated
     with this litigation. See Note 4 of Notes to Consolidated Financial
     Statements. See Part II, Item 1 "Legal Proceedings".

           MERGER COSTS. The merger costs for the third quarter ended July 31,
     1998 of $2.0 million were costs related to the contemplated merger between
     the Company and Tellabs. These costs include approximately $1.2 million in
     Securities and Exchange Commission filing fees and approximately $0.8
     million in legal, accounting, and other related expenses. 

           OPERATING MARGINS. The Company's operating margins were $57.1 million
     and $23.4 million for the third quarters ended July 31, 1997 and 1998,
     respectively, exclusive of the effect of the one-time charges related to
     the settlement of the Pirelli litigation and the costs associated with the
     contemplated merger between the Company and Tellabs. During the third
     quarters 1997 and 1998, operating margins were 46.8% and 18.2% of revenue,
     respectively, exclusive of the effect of the one-time charges related to
     the settlement of the Pirelli litigation and the costs associated with the
     contemplated merger between the Company and Tellabs. The results of
     operations for the third quarter 1998 are not necessarily indicative of
     results to be expected in future periods. See "Risk Factors."



                                       14
<PAGE>   15

           INTEREST AND OTHER INCOME, NET. Interest income and other income
     (expense), net were $1.5 million and $2.6 million for the third quarters
     ended July 31, 1997 and 1998, respectively. The approximate $1.1 million
     increase in interest income and other income (expense), net was
     attributable to higher invested cash balances.

           PROVISION FOR INCOME TAXES. The Company's provision for income taxes
     were $22.8 million and $1.3 million for the third quarters ended July 31,
     1997 and 1998, respectively. During the third quarters 1997 and 1998, the
     provision for income taxes were 38.9% and 38.0% of income before income
     taxes, respectively. The decline in the income tax rate in third quarter
     1998 compared to third quarter 1997 was the result of a lower combined
     effective state income tax expenses, a larger benefit from the Company's
     Foreign Sales Corporation and an increase in tax credits derived from
     research and development activities.

     NINE MONTHS ENDED JULY 31, 1997 COMPARED TO NINE MONTHS ENDED JULY 31, 1998

           REVENUE. The Company recognized $283.1 million and $416.9 million in
     revenue for the nine months ended July 31, 1997 and 1998, respectively. The
     approximate $133.8 million or 47% increase in revenues in the nine months
     ended July 31, 1998 compared to the nine months ended July 31, 1997 was
     largely the result of increased sales to Sprint, Cable and Wireless,
     Hermes, DTI, Teleway, and Japan Telecom offset by a decline in sales to
     WorldCom. The Company had no sales for Cable and Wireless, Hermes, DTI, and
     Japan Telecom in the first nine months of 1997. The Company recognized
     DWDM systems revenue from three and eleven customers during the nine months
     ended July 31, 1997 and 1998, respectively. A significant portion of the
     increase in the Company's nine month 1998 revenues compared to nine month
     1997 revenues was attributed to sales of the Company's Sentry and 4000
     systems, which were not available for sale in the first nine months of
     1997.

           GROSS PROFIT. Gross profits were $166.9 million and $223.6 million
     for the nine months ended July 31, 1997 and 1998, respectively. Gross
     margin as a percentage of revenues was 58.9% and 53.6% for the nine months
     ended July 31, 1997 and 1998, respectively. The approximate $56.7 million
     or 34% increase in gross profit in the first nine months of 1998 compared
     to the first nine months of 1997 was the result of increased revenues for
     those periods. The decline in gross margin percentage for the comparable
     periods was the result of a combination of factors including: a reduction
     in selling price due to the Company's market penetration efforts and
     increased competitive pressures, partially offset by reductions in
     component costs and by reductions in the percentage of significantly lower
     margin installation service revenue to total revenues for the periods.

           RESEARCH AND DEVELOPMENT EXPENSES. Research and development expenses
     were $15.0 million and $45.7 million for the nine months ended July 31,
     1997 and 1998, respectively. During the first nine months of 1997 and 1998,
     research and development expenses were 5.3% and 11.0% of revenue,
     respectively. The approximate $30.7 million or 205% increase in research
     and development expenses in the first nine months of 1998 compared to the
     first nine months of 1997 was the result of increases in staffing levels,
     consumption of prototype materials, utilization of outside consultants for
     certain development efforts and higher costs of test equipment used to
     develop and test new products and features. The Company expenses research
     and development costs as incurred.

           SELLING AND MARKETING EXPENSES. Selling and marketing expenses were
     $14.7 million and $33.5 million for the nine months ended July 31, 1997 and
     1998, respectively. During the first nine months of 1997 and 1998, selling
     and marketing expenses were 5.2% and 8.0% of revenue, respectively. The
     approximate $18.8 million or 128% increase in selling and marketing
     expenses in the first nine months of 1998 compared to the first nine months
     of 1997 was primarily the result of increased staffing levels in the areas
     of sales, technical assistance and field support, and increases in
     commissions earned, trade show participation, promotional costs, travel
     expenditures and rent expense.

           GENERAL AND ADMINISTRATIVE EXPENSES. General and administrative
     expenses were $8.0 million and $12.1 million for the nine months ended July
     31, 1997 and 1998, respectively. During the first nine months of 1997 and
     1998, general and administrative expenses were 2.8% and 2.9% of revenue,
     respectively. The approximate $4.1 million or 51% increase in general and
     administrative expenses in the first nine months of 1998 compared to the
     first nine months of 1997 was primarily increased staffing levels and
     outside consulting services.

           PURCHASED RESEARCH AND DEVELOPMENT. Purchased research and
     development costs were $9.5 million for the nine months ended July 31,
     1998. These costs were for the purchase of technology and related assets
     associated with the acquisition of Terabit during the second quarter 1998.
     See Note 5 of Notes to Consolidated Financial Statements.

           PIRELLI LITIGATION. The Pirelli litigation costs of $30.6 million in
     for the nine months ended July 31, 1998 was attributable to a $30.0 million
     payment made to Pirelli during third quarter 1998 and to additional other
     legal and related costs incurred in connection with the settlement of this
     litigation. See Note 4 of Notes to Consolidated Financial Statements. See
     Part II, Item 1 "Legal Proceedings".

           MERGER COSTS. The merger costs for the nine months ended July 31,
     1998 were costs related to the contemplated merger between the Company and
     Tellabs. These costs include approximately $1.2 million in Securities



                                       15
<PAGE>   16
     and Exchange Commission filing fees and approximately $0.8 million in
     legal, accounting, and other related expenses. 

           OPERATING MARGINS. The Company's operating margins were $129.1
     million and $132.3 million for the nine months ended July 31,1997 and 1998,
     respectively, exclusive of one time charges related to purchased research
     and development, Pirelli litigation and costs associated with the
     contemplated merger between the Company and Tellabs. During the first nine
     months of 1997 and 1998, operating margins were 45.6% and 31.7% of revenue,
     respectively, exclusive of exclusive of one time charges related to
     purchased research and development, Pirelli litigation and costs associated
     with the contemplated merger between the Company and Tellabs. The results
     of operations for the nine months ended July 31, 1998 are not necessarily
     indicative of results to be expected in future periods. See "Risk Factors."

           INTEREST AND OTHER INCOME, NET. Interest income and other income
     (expense), net were $3.9 million and $9.8 million for the nine months ended
     July 31, 1997 and 1998, respectively. The approximate $5.9 million increase
     in interest income and other income (expense), net was attributable to
     higher invested cash balances.

           PROVISION FOR INCOME TAXES. The Company's provision for income taxes
     were $49.6 million and $42.6 million for the nine months ended July 31,
     1997 and 1998, respectively. During the first nine months of 1997 and 1998,
     the provision for income taxes were 38.9% and 38.5% of income before income
     taxes, respectively, exclusive of the effect of one-time charges for
     purchased research and development expenses recorded in the second quarter
     of 1998 and an adjustment to the estimated state income tax liability
     associated with the Alta operations recorded in Alta's first quarter of
     1998. Purchased research and development charges are not deductible for tax
     purposes. The decrease in the income tax rate, exclusive of one-time
     charges, for the first nine months of 1998 compared to first nine months of
     1997 was the result of a lower combined effective state income tax expense,
     a larger benefit from the Company's Foreign Sales Corporation and an
     increase in expected tax credits derived from research and development.

     LIQUIDITY AND CAPITAL RESOURCES

           At July 31, 1998, the Company's principal source of liquidity was its
     cash and cash equivalents of $193.5 million and its marketable debt
     securities of $28.1 million. The Company's marketable debt securities have
     maturities no longer than six months.

           Cash generated from operations was $2.6 million for the nine months
     ended July 31, 1998. This amount was principally attributable to net
     income, the non-cash charges of depreciation, amortization, provisions for
     inventory obsolescence and warranty, purchased research and development,
     increases in accounts payable, and accrued expenses; offset by increases in
     prepaid income taxes, accounts receivable and inventory due to increased
     revenue and to the general increase in business activity.

           Investment activities in the nine months ended July 31, 1998 included
     the net purchase of $28.1 million worth of corporate debt securities, $77.6
     million invested in capital expenditures and $2.1 million used in the
     acquisition of Astracom and Terabit. Of the amount invested in capital
     expenditures, $68.3 million was used for additions to capital equipment and
     furniture and the remaining $9.3 million was invested in leasehold
     improvements.

           The Company made a payment of $30.0 million during June 1998 in
     connection with the settlement of the Pirelli litigation. See Note 4 of
     Notes to Consolidated Financial Statements. See Part II, Item 1 "Legal
     Proceedings".

           The Company believes that its existing cash balance and cash flows
     from future operations will be sufficient to meet the Company's capital
     requirement for at least the next 18 to 24 months.

     YEAR 2000 READINESS

           The Company has taken actions to understand the nature and extent of
     the work required to make its systems, products and infrastructure Year
     2000 compliant. The Company began work this year to change its main
     financial, manufacturing and information system to a company-wide Year 2000
     compliant enterprise resource planning ("ERP") computer-based system and
     expects to have the ERP system fully installed in the fourth quarter of
     1998. The Company believes, based on available information, that it will be
     able to manage its Year 2000 transition without any material adverse effect
     on the Company's business, financial condition and results of operations.
     The Company estimates that it has spent approximately $4.0 million on its
     ERP implementation and estimates that it well likely spend $25,000 to
     $50,000 to address remaining identified Year 2000 issues. The Company
     expects that it will use cash from operations for Year 2000 readiness
     costs. Approximately less than 2% of the information technology budget is
     expected to be used for remediation. No other information technology
     projects have been deferred due to the Year 2000 efforts. To date, the
     Company has not yet employed and independent verification and validation
     processes to assure the reliability of its risk and cost estimates



                                       16
<PAGE>   17

     RISK FACTORS

           ORGANIZATIONAL FOCUS. The Company has been subjected to an avalanche
     of negative media coverage in recent weeks. An oddly timed communication
     from AT&T on August 21, 1998, arriving less than an hour before the
     shareholder votes of both Tellabs and CIENA to approve the merger, and
     indicating its decision to remove CIENA from further consideration as a
     DWDM vendor, added to the media blitz. A shareholder class action lawsuit
     has been filed against the Company and certain members of its management
     team. Within a week of the AT&T August 21 announcement, the exchange ratio
     in the proposed merger with Tellabs was renegotiated from one share of
     Tellabs Common Stock for each share of CIENA Common Stock, to .8 shares of
     Tellabs Common Stock for each share of CIENA Common Stock. On September 9,
     1998, the Company received a copy of a press release indicating that
     Digital Teleport, Inc. ("DTI"), a customer based in St. Louis, Missouri,
     had committed 80% of its planned purchases of DWDM equipment to Pirelli
     Cables and Systems, as part of an apparent package which included Pirelli's
     supply of fiber optic cable needed by DTI to build out its planned national
     network. On September 13, 1998, Tellabs and the Company agreed to
     terminate the merger agreement. The cumulative impact of these events and
     their attendant publicity has caused and may continue to cause a 
     significant distraction of management time and energy from the more direct
     needs of operating and growing the business. The impact of the distraction
     of recent weeks is difficult to project, and could result in adverse
     effects on the near term operating condition and performance of the
     Company. Additionally, the Company believes certain of the media coverage
     was substantially influenced by orchestrated activities of one or more
     short sellers, and of a competitor of the Company. Based on the
     precipitous decline of the Company's stock price in recent weeks, the
     activities of the short seller are believed to have been concluded; there
     is no assurance, however, that the tactics used by the competition to
     foster     adverse publicity regarding the Company will cease. See 
     "Competition".

           COMPETITION. The Company believes the rapid pace at which the need
     for higher and more cost-effective bandwidth has developed was not widely
     anticipated in the global telecommunications industry. The Company further
     believes its MultiWave 1600 is the only commercially deployed and
     operational full 16-channel open architecture DWDM system anywhere in the
     world, and further believes the demonstrated commercial manufacturability
     and delivery record of its MultiWave 4000 system gives the Company's
     high-capacity product offerings a level of credibility not possessed by
     its competitors. However, competition in the global telecommunications
     industry historically has been dominated by a small number of very large
     companies, each of which have greater financial, technical and marketing
     resources, greater manufacturing capacity and more extensive and
     established customer relationships with network operators than the
     Company. Each of Lucent, Alcatel, Nortel, NEC, Pirelli, Siemens and
     Ericsson are moving very aggressively to capture market share in the DWDM
     market. The Company expects and has experienced aggressive competitive
     moves from industry participants, which have to date included early
     announcement of competing or alternative products, substantial and
     increasing price discounting, and other tactics designed specifically to
     target CIENA and its products. Such early announcements of competing
     products can cause confusion and delay in customer purchasing decisions,
     particularly if the announcements are viewed as credible in terms of both
     the performance of the announced product, and the time within which it
     will be available. For example, Lucent announced in January 1997 a
     proposed high-capacity DWDM system which it claims will handle 400 Gb/s of
     capacity per fiber, and which it further claims will be commercially
     available worldwide in the fourth quarter. There can be no assurance that
     announcements like those of Lucent or others in the industry will not
     cause confusion and delay in customer purchasing decisions. Further, if
     new products such as that announced by Lucent are in fact developed,
     perform as advertised, and are manufacturable in volume quantities by the
     fourth quarter of this year, the likelihood of significant orders for the
     Company's 16-channel MultiWave Sentry and 40-channel MultiWave 4000
     systems may diminish. The timing of shipments by the Company and
     corresponding revenue, if delayed by reason of deferred deployment of
     MultiWave Sentry or MultiWave 4000 systems pending evaluation of a
     competitor's product, could and likely would cause substantial swings, and
     potentially material and adverse effects, on the Company's quarterly
     financial condition and results    of operations.

           In addition, Lucent, Alcatel, Nortel, NEC and Siemens are already
     providers of a full complement of switches, fiberoptic transmission
     terminals and fiberoptic signal regenerators and thereby can position
     themselves as vertically integrated, "one-stop shopping" solution providers
     to potential customers.

           While competition in general is broadly based on varying combinations
     of price, manufacturing capacity, timely delivery, system reliability,
     service commitment and installed customer base, as well as on the
     comprehensiveness of the system solution in meeting immediate network needs
     and foreseeable scaleability requirements, the Company's customers are
     themselves under increasing competitive pressure to deliver their services
     at the lowest possible cost. This pressure may result in pricing for DWDM
     systems becoming a more important factor in customer decisions, which may
     favor larger competitors which can spread the effect of price discounts in
     their DWDM product lines across an array of products and services, and a
     customer base, which are larger than the Company's. For example, on
     September 9, 1998, the Company received a copy of a press release
     indicating that DTI, a customer based in St. Louis, Missouri, had committed
     80% of its planned purchases of DWDM equipment to Pirelli Cables and
     Systems, as part of an apparent package which included Pirelli's supply of
     fiber optic cable needed by DTI to build out its planned national network.
     While the Company has supplied its DWDM equipment to DTI, believes DTI is
     satisfied with the operation of the equipment, and is expected to continue
     to be a second source vendor of DWDM equipment to DTI, the Company is not
     able to offer fiber optic cable or other products over which it could
     spread the effects of price discounts on DWDM equipment. The



                                       17

<PAGE>   18

     Company's ability to obtain orders from DTI in the near term may
     therefore be limited absent substantial price discounting.

           The Company's customers generally prefer to have at least two sources
     for key network equipment such as DWDM systems, but the Company has until
     recently been the only supplier of 16 channel, or greater than 16 channel,
     open architecture DWDM systems. As competitors catch up with manufacturable
     DWDM systems which are realistic alternatives to those supplied by the
     Company, the Company's customers may reduce the portion of their DWDM
     purchases allocated to the Company. The DTI/Pirelli announcement of
     September 9 is an example of this. Sprint has for several quarters
     indicated it intends to establish a second vendor for DWDM equipment. The
     timing of Sprint's selection of a second vendor, and the impact a selection
     might have on relative purchasing from the Company and the second vendor,
     are decisions which are not under the control of the Company, and there can
     be no assurance that these decisions will not result in a reduction in
     future purchasing from the Company, which could in turn have a material
     adverse effect on the Company's financial condition and results of
     operations.

           Intellectual property disputes may also be asserted as part of a
     competitive effort to reduce the Company's leadership position and limit
     its ability to achieve greater market share, even if the merits of specific
     disputes are doubtful. Some of the Company's competitors are also key
     suppliers of components for the Company's systems.

           The Company has also been accumulating evidence that a competitor may
     have engaged in targeted and legally questionable activities in order to
     undermine the Company's market position as well as the proposed merger with
     Tellabs. The Company has not yet reached any conclusions regarding this
     evidence, and is continuing to investigate. But the mere fact that one or
     more competitors are apparently willing to resort to such tactics suggests
     how intense the competition is and, from the Company's point of view, how
     far ahead of the competition the Company's products apparently are. The
     Company believes the short-term impact of such tactics can be significant;
     in fact, the Company believes at least some of the adversity it has
     recently encountered is a direct result of such tactics. There is no
     assurance that use of such tactics will cease.

           There can be no assurance that the Company will be able to compete
     successfully with its competitors or that aggressive competitive moves
     faced by the Company will not result in significantly lower prices for the
     Company's products, additional decreases in gross profit margins, and
     otherwise have a material adverse effect on its business, financial
     condition and results of operations.

           CONCENTRATION OF POTENTIAL CUSTOMERS; DEPENDENCE ON MAJOR CUSTOMERS.
     The Company's business, and particularly the size of its revenue growth
     potential, has historically been dependent on two customers, Sprint and
     WorldCom, and will in the near term continue to be highly dependent on
     those two customers, and on the development of new customers, as well as
     obtaining additional business from existing customers. While the scope of
     commercial applications of the Company's MultiWave Metro product (scheduled
     for general availability by the end of 1998) and MultiWave Firefly is
     expected to expand the number of potential customers for the Company, in
     the near term, additional potential customers, consisting almost
     exclusively of long distance and other telecommunications carriers using
     fiberoptic networks, are relatively few in number, and of those, a very
     small number have revenue potential comparable to that of Sprint and
     WorldCom. AT&T was a potential source for significant additional revenue,
     but on August 21, 1998, less than an hour before the shareholder votes of
     both Tellabs and CIENA to approve their merger, AT&T informed CIENA of its
     decision to remove CIENA from further consideration as a DWDM vendor. The
     loss of AT&T as a potential customer heightens the risks to CIENA inherent
     in having a relatively small number of customers. The number of potential
     major customers may also decrease if and as customers merge with or acquire
     one another. In November 1997, WorldCom and MCI announced an agreement to
     merge; in May 1998, SBC and Ameritech announced an agreement to merge; in
     July 1998, Bell Atlantic and GTE announced an agreement to merge. The
     distraction and/or reorganization sometimes attendant to such mergers could
     delay, limit or otherwise adversely affect the capital equipment purchasing
     patterns of the parties to them, with a corresponding adverse effect on the
     Company's sales, even if the customer is otherwise satisfied with or
     interested in the Company's products.

           The Company believes WorldCom is very satisfied with the Company's
     products, and intends to continue significant purchases; however, WorldCom
     informed the Company in February 1998 that its DWDM system requirements for
     1998 will be substantially reduced, based on a change in WorldCom's capital
     equipment acquisition policies. According to information shared with the
     Company in February 1998, WorldCom purchased equipment during 1997, based
     on a policy designed to meet an estimated two years worth of anticipated
     network capacity requirements. The new policy calls for purchasing activity
     and bandwidth deployment to more closely coincide with just in time
     inventory management, which, according to WorldCom, means significant
     purchasing from CIENA may not resume until the latter part of calendar
     1998. Consistent with WorldCom's announced change in purchasing practices,
     WorldCom's purchases in the Company's third quarter were not material. The
     extent to which the recent adverse publicity concerning the Company will
     impact WorldCom's decisions as to whether or when to resume purchasing
     cannot be predicted; it is clear, however, that the Company will have to
     continue to demonstrate to WorldCom and its other customers that the
     Company's existing products and products in development represent
     attractive value in comparison to the alternatives available in the market.


                                       18
<PAGE>   19



           The Company also believes Sprint is very satisfied with the Company's
     products, and intends to continue significant purchases; however, Sprint
     has for several quarters indicated it intends to establish a second vendor
     for DWDM equipment. The timing of Sprint's selection of a second vendor,
     and the impact a selection might have on relative purchasing from the
     Company and the second vendor, are decisions which are not under the
     control of the Company, and there can be no assurance that these decisions
     will not result in a reduction in future purchasing from the Company, which
     could in turn have a material adverse effect on the Company's financial
     condition and results of operations.

           The reduction, delay or cancellation of orders for, or a delay in
     shipment of the Company's products to Sprint, or a failure by WorldCom to
     resume purchasing at significant levels in the latter part of calendar
     1998, or the inability to develop additional customers in the
     telecommunications market would have a material adverse affect on the
     Company's business, financial condition and results of operations. The
     extent to which the recent negative publicity relating to the Company and
     its renegotiated merger agreement with Tellabs will impact the Company's
     ability to develop additional customers, or obtain additional orders from
     existing customers, in the near term is difficult to predict; there can be
     no assurance that there will be no adverse effect, and if the negative
     publicity has the effect of causing customer to delay or reduce purchases
     from the Company, the adverse effect could be material. See "Organizational
     Focus."

           Additionally, the size and complexity of the Company's potential
     customers, and the typically long and unpredictable sales cycles associated
     with them, require the Company to make considerable early investments in
     account management personnel, product customization efforts in both
     engineering and manufacturing, and in some cases, facilities in proximity
     to the customer's locations, without assurance of future revenues. Due to
     the size and complexity of the AT&T network, and the uniqueness of AT&T's
     requirements for the MultiWave Sentry, the Company invested considerable
     financial, engineering, manufacturing and logistics support resources in
     positioning the commercial relationship to be successful. The Company's
     acquisition of Alta, an installation services company, is another example
     of this risk. This acquisition, closed in the second fiscal quarter of
     1998, has brought approximately 160 installation personnel to the Company,
     and was undertaken in large part to position the Company to be able to
     service the installation requirements associated with any AT&T deployment,
     even though the Company had no assurance as to the volume, duration or
     timing of any purchases which might ensue from AT&T. The ongoing leveraging
     of these resources into other customer opportunities will need to be
     completed promptly and efficiently in order to minimize their impact on
     near term results of operations, and there is no assurance the Company will
     successfully do so. The Company also intends to invest in developing
     significant customer relationships with Bell Atlantic and other RBOCs and
     CLECs, as well as internationally. Over the near term, this investment of
     resources has been evident in increased operating expenses and in a rise in
     the Company's manufacturing and general overhead structure, with the result
     that the Company's near term earnings may moderate or even decline, even if
     revenues were to increase, which is not likely in the near term. The
     Company presently expects fiscal fourth quarter 1998 revenues and operating
     results will be materially below those reported for the third fiscal
     quarter 1998. If the Company is unable to convert these investments into
     significant revenue generating relationships over the next two or three
     quarters, the Company's business, financial condition and results of
     operations for the year could be materially and adversely affected.

           IMPACTS OF CHANGES IN CUSTOMER MIX. With the loss of AT&T as a
     potential customer, and with WorldCom yet to resume significant purchasing,
     the Company's sales efforts must focus on a greater number of smaller
     opportunities. The Company believes the pace of bandwidth demand is strong
     enough to create a number of smaller opportunities sufficient to support
     revenue growth over the long term. However, the smaller opportunities often
     represent new carriers working aggressively to establish saleable new
     capacity. These new carriers face a number of problems which the
     established carriers do not; specifically, they must attempt to balance the
     need to build their own customer base, acquire all necessary rights of way
     and interconnections necessary for saleable network service, and build out
     new capacity sufficient to meet anticipated needs, all while working within
     capital budget constraints. These aspects of newer carriers tend to make
     them less predictable as to either timing or volume of purchasing than the
     established carriers; in turn, this tends to exacerbate the problem of
     limited visibility which the Company has regularly struggled with in
     conducting sales forecasting, materials and manufacturing planning, and in
     providing guidance to analysts as part of investor relations activities.
     See "Stock Price Volatility". Unless and until the Company's customer base
     broadens over the next several quarters, the likelihood of unanticipated
     changes in customer purchasing plans which could adversely impact the
     Company's results relative to investor expectations is higher than it has
     been in the past. For example, in the fiscal third quarter being reported
     hereby, an unanticipated delay in a $25 million order from a new carrier
     customer was the principal cause of a shortfall of revenue relative to
     investor expectations and, in turn, significant stock price volatility.
     Although this customer, DTI, was believed to have a clear need for DWDM
     equipment, and was expected to place a substantial order with the Company
     in the near term, the impact of the delay in the third fiscal quarter was
     significant and adverse to the Company's results of operations, and
     investor reaction was particularly adverse. A similar scenario could occur
     in the next few quarters, as much of the Company's anticipated revenue over
     this period is comprised of less than $25 million orders from each of
     several customers. See "Stock Price Volatility". Then, on September 9,
     1998, the Company the Company received a copy of a press release indicating
     that DTI had committed 80% of its planned purchases of DWDM equipment to
     Pirelli Cables and Systems, as part of an apparent package which included
     Pirelli's supply of fiber optic cable needed by DTI to build out its
     planned national network. While the Company is expected to continue to be a
     second source vendor of DWDM equipment to DTI, the Company is not able to
     offer fiber optic cable or


                                       19

<PAGE>   20

     other products over which it could spread the effects of price
     discounts on DWDM equipment. The Company's ability to obtain any orders
     from DTI in the near term may therefore be limited absent substantial price
     discounting.

           COMPETITORS AS SUPPLIERS. Certain of the Company's component
     suppliers are both primary sources for such components and major
     competitors in the market for system equipment. For example, the Company
     buys certain key components from Lucent, Alcatel, Nortel, NEC and Siemens,
     each of which offers optical communications systems and equipment which are
     competitive with the Company's MultiWave 1600 system. Lucent is the sole
     source of two integrated circuits and is one of two suppliers of
     Erbium-doped fiber. Alcatel and Nortel are suppliers of lasers used in the
     MultiWave 1600 system. NEC is a supplier of certain testing equipment. The
     Company's business, financial condition and results of operations could be
     materially and adversely affected if these supply relationships were to
     decline in reliability or otherwise change in any manner adverse to the
     Company. The Company to date has not experienced to date any general
     decline in reliability among these vendors, but the intensifying
     competition described above makes this risk factor increasingly important.

           FLUCTUATION IN QUARTERLY AND ANNUAL RESULTS. The Company's revenue
     and operating results have varied and are likely to continue to vary
     significantly from quarter to quarter and from year to year as a result of
     a number of factors, including the size and timing of orders, product mix
     and shipments of systems. The timing of order placement, size of orders,
     satisfaction of contractual customer acceptance criteria, as well as order
     delays or deferrals and shipment delays and deferrals, may cause material
     fluctuations in revenue. As an example, the unexpected delay of an
     anticipated $25 million order from DTI during the third fiscal quarter
     materially impacted the Company's results of operations. This order now
     appears likely to be further delayed, reduced or possibly withheld
     completely as the result of certain commitments made by the DTI with
     Pirelli. See "Competition" and "Impacts of Changes in Customer Mix".
     Delays or deferrals in purchasing decisions may increase as competitors
     introduce new competing products, customers change purchasing practices,
     and as the Company develops or introduces other DWDM products, such as the
     MultiWave Sentry, MultiWave 4000, MultiWave Firefly and the MultiWave
     Metro. Consolidation among the Company's customers and target customers,
     such as that involved in the WorldCom/MCI merger, and the distraction
     and/or reorganization attendant to such consolidation, may also lead to
     delay or deferral of purchasing decisions. See "Concentration of Potential
     Customers; Dependence on Major Customers". Changes in customers'
     approaches to bandwidth deployment can also materially impact purchasing
     decisions. See "Anticipating Demand for Bandwidth." The ongoing shift in
     the Company's customer mix also affects the likelihood of fluctuating
     results. See "Impacts of Changes in Customer Mix".

           The Company's dependence on a small number of existing and potential
     customers increases the revenue impact of each customer's actions relative
     to these factors. The Company's expense levels in the future will be
     partially based on its expectations of long term future revenue and as a
     result net income for any quarterly period in which material orders are
     shipped or delayed or not forthcoming could vary significantly. The
     Company's expense levels for the next two quarters are expected to reflect
     substantially increased investment in financial, engineering, manufacturing
     and logistics support resources in positioning the AT&T, RBOC,
     international and other potential commercial relationships to be
     successful, even though AT&T has now removed CIENA from further
     consideration as a DWDM vendor, and there is no assurance as to the volume,
     duration or timing of any purchases which might ensue from the others. See
     "Concentration of Potential Customers; Dependence on Major Customers". Over
     the near term, this investment of resources has been evident in increased
     inventory levels and operating expenses, and in a rise in the Company's
     manufacturing and general overhead and expense structure, with the result
     that the Company's near term earnings may moderate or decline, even if
     revenues were to increase, which is not likely in the near term. The
     Company presently expects fiscal fourth quarter 1998 revenues and operating
     results will be materially below those reported for the third fiscal
     quarter 1998. In  general, quarter-to-quarter sequential revenue in the
     first two or three years of operations are likely to vary widely and
     therefore may not be reliable indicators of annual performance.

           DEPENDENCE ON KEY PERSONNEL. The Company's success has always
     depended in large part upon its ability to attract and retain
     highly-skilled technical, managerial, sales and marketing personnel,
     particularly those skilled and experienced with optical communications
     equipment. Competition for such personnel is intense and there can be no
     assurance that the Company will be successful in retaining its existing key
     personnel and in attracting and retaining the personnel it requires.
     Competition for such personnel often intensifies when a company becomes
     party to a merger, as various recruiters look for key personnel interested
     in leaving. The pending and now terminated merger with Tellabs, and the
     attendant publicity and media speculation regarding its outcome, have
     introduced uncertainty among personnel relating to the future direction of
     the Company. See "Organizational Focus" Additionally, the stock price
     volatility and eventual decline attendant to events of the past few weeks
     have left many key contributors to the Company without meaningful equity
     incentives--their incentive stock options are now significantly "out of
     the money". The Company believes its management team and other key
     contributors were and are committed to remain intact, with or without the
     merger with Tellabs, but there can be no assurance of that, and the loss
     of equity incentives may adversely effect the Company's ability to retain
     them. Failure to retain the Company's key personnel, and attract new
     personnel likely would have a material adverse effect on the Company's     
     business, financial condition and results of operations.


                                       20
<PAGE>   21



           LEGAL PROCEEDINGS. See Part II, "Legal Proceedings" for disclosure
     concerning a recent shareholder class action lawsuit filed against the
     Company and certain of its officers and directors. Because the matter is at
     an early stage, it is not possible to predict its outcome at this time, and
     there is no assurance that the outcome would not have a material adverse
     effect on the Company's financial condition and results of operations.

           ANTICIPATING DEMAND FOR BANDWIDTH. The Company's systems enable high
     capacity transmission over long distance, and with the introduction of
     MultiWave Firefly, certain short-haul portions of, optical communications
     networks; however, the Company's customers and target customers determine
     how much capacity is required, when it will be deployed, and what equipment
     configurations will be used, if any. The Company has encountered a wide
     variety of customer views of how much capacity will be needed over what
     periods of time, as well as how to convert such capacity into revenue.
     Those views reflect the carriers' differing competitive strategies and
     financial and marketing resources, and result in widely varying patterns
     and timing of evaluation, purchase and deployment of the Company's systems,
     other DWDM systems or other capacity solutions. Certain carriers have
     believed the deployment of large-scale capacity quickly will be a
     competitive advantage--i.e., they have assumed the accelerating demand for
     bandwidth will continue and the capacity will be utilized quickly. This
     viewpoint leads to prompt and widespread deployment of high-channel count
     DWDM systems. Other carriers have adopted more of a wait-and-see approach,
     which dictates a more gradual channel by channel deployment of higher
     capacity systems. New carrier entrants sometimes try to combine these
     viewpoints, favoring rapid and widespread installation of the foundational
     elements of high capacity systems, while opting for pricing and other
     supply agreement features which allow for deferral of channel purchases
     until the need is demonstrated. These views are further influenced by the
     pace at which the higher bandwidth available over long distance routes is
     distributed or distributable over "the last mile" of the networks, as well
     as the willingness of carriers to aggressively lower their charges for
     services as a means of accelerating consumption of the higher bandwidth.
     All of these views are also subject to abrupt change, as competition and
     the evolving marketplace may demand. As an example, WorldCom informed the
     Company in February 1998 that its DWDM system requirements for 1998 would
     be substantially below last year's purchases of $184.5 million. WorldCom
     indicated to the Company that last year it purchased DWDM systems from the
     Company at a level that contemplated two years' of capacity requirements,
     and that this year's purchases would be substantially reduced because
     limited to one year's estimate of capacity requirements. WorldCom's
     information in February 1998 demonstrated that there can be surprises as
     network operators and their purchasing groups grapple with unprecedented
     changes and challenges to network planning. As a further example of the
     impact of the evolving marketplace, the Company has shipped equipment
     during fiscal 1998 to several new customers attempting to build out new
     networks--under circumstances where the Company had not even identified
     these customer opportunities within a year of shipment.

           Under these circumstances, for so long as the Company remains
     dependent on few customers, the Company will be vulnerable to significant
     quarterly fluctuations, and to difficulty in predicting the direction or
     magnitude of future demand for the Company's systems.

           The Company believes growth in data communications and in commercial
     and consumer use of the Internet remains solid as a market driver of demand
     for bandwidth, which in turn fuels demand for DWDM systems and other
     high-bandwidth solutions. The Company also is confident that its products
     are well targeted toward the visible emerging chokepoints in the networks.
     The Company is less certain whether it will be able to accurately
     anticipate changes in direction or magnitude of near term demand.
     Unanticipated reductions in demand would adversely affect the Company's
     profitability and, depending on the size of the gap between actual, reduced
     demand, and investor expectation of such demand, could result in further
     stock price volatility irrespective of the Company's overall competitive
     position and long term prospects.

           LONG AND UNPREDICTABLE SALES CYCLES. The purchase of network
     equipment such as DWDM equipment is typically carried out by network
     operators pursuant to multiyear purchasing programs which may increase or
     decrease annually as the operators adjust their capital equipment budgets
     and purchasing priorities. The Company's customers do not typically share
     detailed information on the duration or magnitude of planned purchasing
     programs, nor do they consistently provide to the Company advance notice of
     contemplated changes in their capital equipment budgets and purchasing
     priorities. Additionally, a typical year end wind-down of customers' annual
     capital equipment procurement cycles, or a seasonal slow down in
     purchasing, neither of which was experienced by the Company in its first
     year of product shipments, may be experienced in this and future years.
     Further, the Company is experiencing a shift in its customer mix which may
     add to the length and unpredictable nature of the sales cycle. See "Impacts
     of Changes in Customer Mix". These uncertainties substantially complicate
     the Company's manufacturing planning, and may lead to substantial and
     unanticipated fluctuations in the timing of orders and revenue. The Company
     has in fact experienced such unanticipated fluctuations in prior quarters,
     but until this third fiscal quarter of 1998, any unanticipated reduction in
     orders from one customer had been offset in part or in whole by
     unanticipated increases in orders for other routes with the same customer
     or in orders from another customer. Unless and until WorldCom resumes
     purchases at a level comparable to the prior fiscal year, the Company will
     continue to need material purchases from one or more other customers in
     order to offset the reduction from WorldCom. There can be no assurance of
     the Company's ability to offset reductions, and in particular, Sprint is
     unlikely to continue purchasing at the rate experienced in the two quarters
     just completed.


                                       21
<PAGE>   22

           Any curtailment or termination of customer purchasing programs,
     decreases in customer capital budgets or reduction in the purchasing
     priority assigned to equipment such as DWDM equipment, particularly if
     significant and unanticipated by the Company and not offset by increased
     purchasing from other customers, could have a material adverse effect on
     the Company's business, financial condition and results of operations. For
     example, an expected $25 million order for the third fiscal quarter was
     unexpectedly delayed by the customer late in the quarter just completed,
     leading in substantial part to a shortfall in revenue and net income
     relative to investor expectations. This delayed order now appears likely to
     be further delayed, reduced or possibly withheld completely as the result
     of new commitments by the customer to purchase DWDM equipment from a
     competitor. See discussion of DTI under "Competition" and "Impacts of
     Changes in Customer Mix".

           Further, as is the case with most manufacturing companies, the
     Company has manufactured, and from time to time in the future likely will
     manufacture finished products on the basis of non-binding customer
     forecasts rather than actual purchase orders. However, in contrast to most
     manufacturing companies, given the Company's dependence on very few
     customers, and the relatively high cost of the Company's DWDM systems, the
     financial consequences of mismatches between what is built and what is
     actually ordered can be magnified. Long distance carriers may also
     encounter delays in their build out of new routes or in their installation
     of new equipment in existing routes, with the result that orders for the
     MultiWave systems may be delayed or deferred. Any such delay with any major
     customer, as well as any other delay or deferral of orders for MultiWave
     systems, could result in material fluctuations in the timing of orders and
     revenue, and could have a material adverse effect on the Company's
     business, financial condition and results of operations.

           NEW PRODUCT DEVELOPMENT DELAYS. The Company's ability to anticipate
     changes in technology, industry standards, customer requirements and
     product offerings and to develop and introduce new and enhanced products in
     a timely fashion relative to customer expectations of increasingly short
     product development cycles, will be significant factors in the Company's
     ability to remain a market leader in the deployment of DWDM systems. The
     complexity of the technology involved in product development efforts in the
     DWDM field, including product customization efforts for individual
     customers, can result in unanticipated delays. The qualification and
     ramping up of new suppliers for new or customized products requires
     extensive planning and can result in unanticipated delays which affect the
     Company's ability to deliver such products in a timely fashion. The
     software certification process for new telecom equipment used in RBOC
     networks--a process traditionally conducted by Bellcore on behalf of the
     RBOCs--can also result in unanticipated delays, and has resulted in some
     delay in the commercial introduction of MultiWave Firefly. The failure to
     deliver new and improved products, or appropriately customized products, in
     a timely fashion relative to customer expectations (which expectations can
     be influenced by competitors' announcements of competing products), would
     have a material adverse effect on the Company's competitive position and
     financial condition. See "Competition". The Company has made a general
     commitment to the delivery of MultiWave Sentry, MultiWave 4000 and
     MultiWave Firefly at various times during this fiscal year. The Company's
     performance on this commitment relative to customer expectations will
     likely have a material impact on the Company's ability to further solidify
     its position in the telecom industry as a credible, long-term supplier of
     multiple products and successive next-generation solutions. The Company
     believes it will be successful in this effort, but there is no assurance of
     that, and there will likely be few objective "leading indicators" of the
     Company's success or failure, other than continued purchasing by its
     customers.

           RECENT PRODUCT INTRODUCTION. The MultiWave 1600 has been operational
     and carrying live traffic for approximately two years; the MultiWave Sentry
     and MultiWave 4000 for less than a year; and the MultiWave Firefly is just
     now being introduced into the field. The Company's history of installation
     activity indicates that the newness and high precision nature of DWDM
     equipment may require enhanced customer training and installation support
     from the Company. The Company is aware of instances domestically and
     internationally in which installation and activation of certain MultiWave
     systems have been delayed due to faulty components found in certain
     portions of these systems. The Company is aware of few performance issues
     once the systems are installed and operational. However, if recurring or
     material reliability, quality or network monitoring problems should
     develop, a number of material and adverse effects could result, including
     manufacturing rework costs, high service and warranty expense, high levels
     of product returns, delays in collecting accounts receivable, reduced
     orders from existing customers and declining level of interest from
     potential customers. Although the Company maintains accruals for product
     warranties, there can be no assurance that actual costs will not exceed
     these amounts. The pace at which the customer requires upgrades from 16 to
     40 to higher channel count systems occurs (which in some cases can involve
     replacement of portions of the existing equipment) can further complicate
     the assessment of appropriate product warranty reserves. The Company
     expects there will be interruptions or delays from time to time in the
     activation of the systems and the addition of channels, particularly
     because the Company does not control all aspects of the installation and
     activation activities. The Company believes its record to date of problem
     identification, diagnosis and resolution has been good, but if significant
     interruptions or delays occur, or if their cause is not promptly
     identified, diagnosed and resolved, confidence in the MultiWave systems
     could be undermined. An undermining of confidence in the MultiWave systems
     would have a material adverse effect on the Company's customer
     relationships, business, financial condition and results of operations.


                                       22
<PAGE>   23

           STOCK PRICE VOLATILITY. The Company's Common Stock price has
     experienced substantial price volatility, and is likely to continue to do
     so. Such volatility can arise as a result of the activities of short
     sellers and risk arbitrageurs, and may have little relationship to the
     Company's financial results or prospects. Volatility can also arise as a
     result of any divergence between the Company's actual or anticipated
     financial results and published expectations of analysts and as a result of
     announcements by the Company, as occurred in the quarter just ended. The
     Company attempts to address this possible divergence through its public
     announcements and reports; however, the degree of specificity the Company
     can offer in such announcements, and the likelihood that any
     forward-looking statements made by the Company will prove correct in actual
     results, can and will vary, due primarily to the uncertainties associated
     with the Company's dependence on a small number of existing and potential
     customers, the impacts of changes in the customer mix, the actions of
     competitors, long and unpredictable sales cycles and customer purchasing
     programs, the absence of unconditional minimum purchase commitments from
     any customer, a declining level of visibility into its customers'
     deployment plans over the course of the capital equipment procurement year,
     and the lack of reliable data on which to anticipate core demand for high
     bandwidth transmission capacity. An example of this uncertainty is
     evidenced in the February 1998 communication from WorldCom that its DWDM
     system requirements for 1998 would be substantially reduced relative to
     last year's purchases, due to a change in its purchasing policies. See
     "Concentration of Potential Customers; Dependence on Major Customers". A
     further example of this uncertainty occurred this quarter, as a $25 million
     order from a customer was unexpectedly delayed late in the quarter. This
     delayed order now appears likely to be further delayed, reduced or possibly
     withheld completely as the result of new commitments by the customer to
     purchase DWDM equipment from a competitor. See discussion of DTI under
     "Competition" and "Impacts of Changes in Customer Mix".

           The WorldCom example, and the example of this third fiscal quarter
     indicate that divergence between the Company's actual or anticipated
     financial results and published expectations of stock analysts can occur
     notwithstanding the Company's efforts to address those expectations through
     public announcements and reports. Such divergence will likely occur from
     time to time in the future, with resulting stock price volatility,
     irrespective of the Company's overall year to year performance or long term
     prospects. For so long as the Company remains highly dependent on few
     customers, and particularly in years, like the current fiscal year, when
     substantial majority of purchases by these customers are likely to be
     focused on products, such as MultiWave Sentry, MultiWave 4000, and
     MultiWave Firefly, being introduced for the first time, there is
     substantial risk of widely varying quarterly results, including the
     so-called "missed quarter" relative to investor expectations which do not
     account for these issues, with attendant risk of higher volatility in the
     Company's stock price. See "Concentration of Potential Customers;
     Dependence on Major Customers"; and "Anticipating Demand for Bandwidth".


PART II. - OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

     PIRELLI LITIGATION

           On June 1, 1998 the Company announced resolution of the long-standing
     litigation with Pirelli S.p.A. The terms of the settlement involve
     dismissal of Pirelli's three lawsuits against CIENA now pending in
     Delaware, dismissal of CIENA's legal proceedings against Pirelli in the
     United States International Trade Commission, a worldwide, non-exclusive
     cross-license to each party's patent portfolios, a five-year moratorium on
     future litigation between the parties, and certain undisclosed financial
     terms. As a result of the settlement, CIENA recorded a one-time charge for
     the nine months ended July 31, 1998, of $30.6 million relating to the
     Pirelli settlement and associated legal fees.

     KIMBERLIN LITIGATION

           Kevin Kimberlin and parties controlled by him (the "Kimberlin
     Parties") are owners of Common Stock of the Company, the substantial
     majority of which has been derived from the conversion at the time of the
     Company's IPO of Series A, Series B and Series C Preferred Stock then owned
     by them. On November 20, 1996, the Kimberlin Parties filed suit in U.S.
     District Court for the Southern District of New York against the Company,
     and certain directors of the Company, alleging that the Kimberlin Parties
     were entitled to purchase additional shares of Series C Preferred Stock at
     the time of the closing of the Series C Preferred Stock financing, but were
     denied that opportunity by the defendants. The lawsuit alleges that certain
     rights of first refusal existing under the Series B Preferred Stock
     Purchase Agreement entitled the Kimberlin Parties to purchase more shares
     of Series C Preferred Stock than were in fact purchased by them at the time
     of the closing of the Series C Preferred Stock financing in December 1995.
     The lawsuit claims breach of contract, breach of fiduciary duty and
     violation of Securities and Exchange Commission Rule 10b-5 by the
     defendants. On January 6, 1997, the Company filed its answer to the
     Kimberlin Parties complaint, and filed a counterclaim for rescission of the
     sale of the shares of Series C Preferred Stock purchased by the Kimberlin
     Parties in the Series C Preferred Stock financing. The Kimberlin Parties
     amended their complaint in May 1997, 


                                       23
<PAGE>   24

     alleging that the same facts and conduct with respect to the private
     placement of Series C Preferred Stock represent a violation of federal
     insider trading laws.

           The number of shares to be purchased by each party to the Series C
     Preferred Stock financing was communicated in writing to the Kimberlin
     Parties in December 1995 prior to the Series C closing. Further, as
     permitted under the Series B Preferred Stock Purchase Agreement, the Series
     C Preferred Stock Purchase Agreement expressly stated that all rights of
     first refusal referred to in the lawsuit were waived. The required number
     of Series B investors, including the Kimberlin Parties, signed the Series C
     Preferred Stock Purchase Agreement containing that waiver. In July 1996,
     the Kimberlin Parties reaffirmed to the Company in writing that their
     beneficial ownership of shares did not include any shares which they have
     subsequently claimed in the lawsuit they were entitled to purchase. The
     Kimberlin Parties allege that they were misled into waiving their right of
     first refusal, and did not discover that they had been misled until October
     1996.

           The Company believes that the Kimberlin Parties' claims, brought as
     the Company's IPO was being prepared, and the amended claims, are without
     merit and intends to defend itself vigorously. The Company has moved for
     summary judgment on the entire matter, including the Company's counterclaim
     for rescission. The Kimberlin Parties have also moved for summary judgment
     on a portion of the dispute. The Company believes its motion for summary
     judgment should be granted, but there is no assurance of that outcome. If
     the motion is not granted the Company intends to proceed to trial.

           If the Company's motion for summary judgment is denied, the Company
     intends to take the matter to trial; if the plaintiff's motion is granted,
     the Company intends to appeal. There can be no assurance of the outcome of
     the pending motions.

     CLASS ACTION LITIGATION

           A class action complaint was filed on August 26, 1998 in U.S.
     District Court for the District of Maryland entitled Witkin et.al v. CIENA
     Corporation et. al (Case No. Y-98-2946). The complaint alleges that CIENA
     and certain officers and directors violated certain provisions of the
     federal securities laws, including Rule 10b-5 under the Securities Exchange
     Act of 1934, by making false statements, failing to disclose material
     information and taking other actions intending to artificially inflate and
     maintain the market price of CIENA's common stock during the Class Period
     of May 21, 1998 to August 21, 1998, inclusive. The plaintiffs seek
     designation of the suit as a class action on behalf of all persons who
     purchased shares of CIENA's common stock during the Class Period and the
     awarding of compensatory damages in an amount to be determined at trial and
     attorneys' fees. While this proceeding is at a very early stage, the
     Company believes the suit is without merit and intends to defend itself
     vigorously.

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

          (a)    Exhibit      Description
                 -------      -----------

                  11.0        Statement of Computation of Per Share Earnings - 
                              see Note 1 of Notes to Consolidated Financial
                              Statements

                  27.0        Financial Data Schedule (filed only electronically
                              with the SEC)

           (b) Reports on Form 8-K: Form 8-K filed June 3, 1998, June 23, 1998,
           August 14, 1998, August 24, 1998 and August 27, 1998


                                       24

<PAGE>   25




                                   SIGNATURES


           Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                            CIENA CORPORATION


Date:  September  14, 1998                  By:   /s/ Patrick H. Nettles
       -------------------                        ----------------------
                                                  Patrick H. Nettles
                                                  President, Chief
                                                  Executive Officer
                                                  and Director
                                                  (Duly Authorized Officer)



Date: September  14, 1998                   By:   /s/ Joseph R. Chinnici
      -------------------                         ----------------------
                                                  Joseph R. Chinnici
                                                  Senior Vice President,
                                                  Finance and
                                                  Chief Financial Officer
                                                  (Principal Financial Officer)

                                       25


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains Summary Financial Information extracted from The
Balance Sheet, Statement of Operation and Statement of Cash Flows included
in the Company's Form 10-Q for the period ending July 31, 1998, and is qualified
in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          OCT-31-1998
<PERIOD-START>                             MAY-01-1998
<PERIOD-END>                               JUL-31-1998
<CASH>                                         193,486
<SECURITIES>                                    28,132
<RECEIVABLES>                                  109,210
<ALLOWANCES>                                       730
<INVENTORY>                                     76,343
<CURRENT-ASSETS>                               444,913
<PP&E>                                         158,643
<DEPRECIATION>                                  33,383
<TOTAL-ASSETS>                                 591,235
<CURRENT-LIABILITIES>                           77,366
<BONDS>                                              0
                                0
                                          0
<COMMON>                                         1,025
<OTHER-SE>                                     479,906
<TOTAL-LIABILITY-AND-EQUITY>                   591,235
<SALES>                                        129,116
<TOTAL-REVENUES>                               129,116
<CGS>                                           70,431
<TOTAL-COSTS>                                   70,431
<OTHER-EXPENSES>                                57,835
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  58
<INCOME-PRETAX>                                  3,369
<INCOME-TAX>                                     1,280
<INCOME-CONTINUING>                              2,089
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     2,089
<EPS-PRIMARY>                                     0.02
<EPS-DILUTED>                                     0.02
        

</TABLE>


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