Document:

<PAGE>   1
                                                                   EXHIBIT 10.33

                             SECURED PROMISSORY NOTE

$__________________                                             __________, 200_

     FOR VALUE RECEIVED, ______________ (the "Maker"), promises to pay to
Unisphere Networks, Inc., a Delaware corporation (the "Company"), or order, at
its principal executive offices, the principal sum of ______________ Dollars
($__________), together with interest on the unpaid principal balance of this
Note from time to time outstanding at the rate of ____% per annum, compounded
annually, until paid in full. Principal on this Note shall be paid in full on
January 1, 2003.

     Accrued interest shall be paid by the undersigned semi-annually on July 1
and January 1 of each year, commencing on July 1, 2001. Interest on this Note
shall be computed on the basis of a year of 365 days for the actual number of
days elapsed.

     Notwithstanding the foregoing, payment of this Note shall be required in
full, together with interest on the unpaid principal balance hereof at the rate
of ____% per annum, upon the date of the Maker's termination of employment with
the Company, regardless of whether such termination is voluntary or involuntary,
with or without cause or reason, if such termination of employment occurs prior
to December 1, 2002.

     Payment of this Note is secured by a security interest in shares of Common
Stock of the Company acquired by the Maker with the proceeds of the Note,
pursuant to a pledge agreement of even date herewith between the Maker and the
Company (the "Pledge Agreement").

     The Company shall have (i) full recourse against the Pledged Collateral
under the Pledge Agreement in connection with the repayment of the principal of
the Note and accrued interest thereon, (ii) recourse up to the Recourse Amount
(as hereinafter defined) against any other personal assets of the Maker and
(iii) recourse up to the Recourse Amount against any compensation or other
amounts due the Maker resulting from his/her employment by the Company, and a
right to immediate set off against such compensation or other amounts to the
full extent permitted by law. The Recourse Amount as of any time shall mean the
sum of (i) 100% of the principal amount hereof and (ii) the full amount of
accrued interest under this Note.

     The Maker may prepay on the 1st calendar day (or if banks in the State of
New York or the Commonwealth of Massachusetts are authorized by law to remain
closed, then on the next day such banks shall be open for business) of
September, December, March and June of each calendar year, in whole or in part,
without premium or penalty, any of the principal balance hereof or accrued
interest thereon; provided that such prepayment is at least equal to 25% of the
outstanding Principal due under this Note.

     This Note shall become immediately due and payable without notice or demand
upon the
<PAGE>   2
occurrence at any time of any of the following events of default (individually,
"an Event of Default" and collectively, "Events of Default"):

     1.   default in the payment when due of any principal or interest under
          this Note;

     2.   the occurrence of any Event of Default under the Pledge Agreement;

     3.   the institution by or against the Maker of any proceedings under the
          United States Bankruptcy Code or any other federal or state
          bankruptcy, reorganization, receivership, insolvency or other similar
          law affecting the rights of creditors generally or the making by the
          Maker of a composition or an assignment or trust mortgage for the
          benefit of creditors; or

     4.   the Maker violates the non-competition or confidentiality provisions
          of any employment contract, confidentiality and nondisclosure
          agreement or other agreement between the Maker and the Company.

     Upon the occurrence of an Event of Default, the holder shall have then, or
at any time thereafter, all of the rights and remedies afforded a secured
creditor by the Uniform Commercial Code as from time to time in effect in the
Commonwealth of Massachusetts or afforded by other applicable law.

     Maker agrees to pay on demand all costs of collection, including, but not
limited to, reasonable attorney's fees, incurred by the holder in connection
with any action taken to enforce the terms of this Note.

     No delay or omission on the part of the holder in exercising any right
under this Note or the Pledge Agreement shall operate as a waiver of such right
or of any other right of such holder, nor shall any delay, omission or waiver on
any one occasion be deemed a bar to or waiver of the same or any other right on
any future occasion. The Maker regardless of the time, order or place of signing
waives presentment, demand, protest and notices of every kind.

     If any amounts under this Note become due and payable on a Saturday or
Sunday or a day on which banks in the State of New York or the Commonwealth of
Massachusetts are authorized by law to remain closed, such amounts shall be paid
on the next succeeding day that such banks shall be open for business.

     Payments of principal and interest shall be made to the holder hereof, or
its designee, in such coin or currency of the United States of America as at the
time of payment shall be legal tender for the payment of public and private
debts, at the offices of Unisphere Networks, Inc., One Executive Drive,
Chelmsford, Massachusetts 01824.

     All rights and obligations hereunder shall be governed by the laws of the
Commonwealth of Massachusetts and this Note is executed as an instrument under
seal. The Maker hereby submits to the jurisdiction of the United States District
Court for the District of Massachusetts and of any Massachusetts state court,
with respect to any action, suit or proceeding brought

                                      -2-
<PAGE>   3
against it arising out of or relating to this Note and the transactions
contemplated hereby. The Maker hereby irrevocably waives, to the fullest extent
permitted by applicable law, any objection which it may now or hereafter have to
the laying of the venue of any such action, suit or proceeding brought in such a
court and any claim that any such action, suit or proceeding brought in such a
court has been brought in an inconvenient forum.

                                              ---------------------------------
                                              Signature

                                              ---------------------------------
                                              Print Name

                                      -3-<PAGE>   1
                                                                   EXHIBIT 10.34

                                PLEDGE AGREEMENT

     THIS PLEDGE AGREEMENT (as amended from time to time, this "Agreement"),
dated as of ________, 2001, is made by ______________ ("Pledgor"), in favor of
Unisphere Networks, Inc., a Delaware corporation ("Secured Party").

     In order to induce Secured Party to make the loan contemplated by the
promissory note of even date herewith in the amount of $_________ as the same
may be amended, replaced, restated or otherwise modified from time to time (the
"Note"), Pledgor hereby agrees as follows:

                             ARTICLE 1. THE PLEDGE.

Section 1.1. Pledge. Pledgor hereby pledges to Secured Party, and grants to
Secured Party a security interest in, the following (the "Pledged Collateral"):

     (a) __________ shares of Common Stock of the Secured Party now owned by the
Pledgor and acquired with the loan contemplated by the promissory note (the
"Pledged Securities"), and all stock dividends and other property and proceeds
from time to time received, receivable or otherwise distributed in respect of or
in exchange for or upon sale of any or all of the Pledged Securities; and

     (b) all additional securities or other consideration from time to time
acquired by Pledgor in substitution for or in respect of the Pledged Securities,
and the certificates representing such additional securities, and all stock
dividends and other property from time to time received, receivable or otherwise
distributed in respect of or in exchange for any or all of such securities.

Section 1.2. Security for Obligations. This Agreement secures the payment of all
obligations of the Pledgor now or hereafter existing under the Note (all such
obligations being the "Obligations").

Section 1.3. Delivery of Pledged Collateral; Sale of Pledged Collateral. All
certificates or instruments representing or evidencing the Pledged Collateral
shall be delivered to Secured Party to be held by Secured Party (or to the
Escrow Agent under the Company's 1999 Stock Incentive Plan) and shall be in
suitable form for transfer by delivery, or shall be accompanied by duly executed
instruments of transfer or assignment in blank, all in form and substance
satisfactory to Secured Party. Secured Party shall have the right, at any time
following an Event of Default, in its sole discretion and without notice to
Pledgor, to sell or to transfer to or to register in the name of Secured Party,
or any of Secured Party's nominees (or to direct the Escrow Agent to sell or to
so transfer) any or all of the Pledged Collateral, subject only to the revocable
rights specified in Section 4.2(a). Secured Party shall send notice to Pledgor
of any such sale, transfer, registration or exchange of the Pledged Collateral
promptly after such event.

Section 1.4. Continuing Agreement. This Agreement shall create a continuing
security interest in the Pledged Collateral and shall remain in full force and
effect until payment in full of the Obligations. Upon the payment in full of the
Obligations, in cash, Pledgor shall be entitled to the return and re-transfer to
him, upon his request and at his expense, of such of the Pledged
<PAGE>   2

Collateral as shall not have been sold or otherwise applied pursuant to the
terms hereof.

Section 1.5. Security Interest Absolute. All rights of Secured Party and
security interests hereunder, and all obligations of Pledgor hereunder shall be
absolute and unconditional, irrespective of any defenses whatsoever available to
the Pledgor.

                             ARTICLE 2. COVENANTS.

Section 2.1. Further Assurances. Pledgor agrees that at any time and from time
to time, at Pledgor's expense, Pledgor will promptly execute and deliver all
further instruments and documents, and take all further action, that may be
necessary or desirable, or that Secured Party may reasonably request, in order
to perfect and protect any security interest granted or purported to be granted
hereby or under the Note or to enable Secured Party to exercise and enforce
Secured Party's rights and remedies hereunder or under the Note with respect to
any Pledged Collateral.

                           ARTICLE 3. SECURED PARTY.

Section 3.1. Attorney-in-Fact. Pledgor hereby irrevocably appoints the Secured
Party as the Pledgor's attorney-in-fact with full power of substitution and with
full authority in the place and stead of Pledgor and in the name of Pledgor or
otherwise, from time to time in Secured Party's discretion to take any action
and to execute any instrument which Secured Party may reasonably deem necessary
or advisable to accomplish the purposes of this Agreement, including without
limitation to receive, endorse and collect all instruments made payable to
Pledgor representing any dividend, interest payment or other distribution in
respect of the Pledged Collateral or any part thereof and to give full discharge
for the same.

Section 3.2. Right To Perform. If Pledgor fails to perform any agreement
contained herein, Secured Party may perform, or cause performance of, such
agreement.

                              ARTICLE 4. DEFAULT.

Section 4.1. Default; Event of Default.

     For purposes of this Agreement the terms "Default" and "Event of Default"
shall have the following meanings:

     (a) "Default" means the occurrence of any event or condition that with the
passage of time or giving of notice, or both, would constitute an Event of
Default.

     (b) The occurrence of any one or more of the following events or conditions
shall constitute an "Event of Default" under this Agreement:

         (i) Failure of the Pledgor to make any payment of principal or interest
when due under the Note;

         (ii) If Pledgor violates the non-competition or confidentiality
provisions of

                                      -2-
<PAGE>   3

any employment contract, confidentiality and nondisclosure agreement or other
agreement between the Pledgor and the Secured Party;

         (iii) Breach of or failure in the due observance or performance of any
covenant, condition or agreement on the part of Pledgor to be observed or
performed pursuant to this Agreement or the Note, which such breach or failure
is not cured within 30 days after written notice thereof;

         (iv) if Pledgor is not paying his or her debts as they become due,
becomes insolvent, files or has filed against him or her a petition under any
chapter of the United States Bankruptcy Code, 11 U.S.C. Section 101 et seq. (or
any similar petition under any insolvency law of any jurisdiction), proposes any
liquidation, composition or financial reorganization with his creditors, makes
an assignment or trust mortgage for the benefit of creditors, or if a receiver,
trustee, custodian or similar agent is appointed or takes possession with
respect to any property or business of Pledgor; or

         (v) if any lien, encumbrance or adverse claim of any nature whatsoever
is asserted with respect to any Shares.

Section 4.2. Voting Rights; Dividends; Etc.

     (a) So long as no Default or Event of Default shall have occurred which has
not been expressly waived:

         (i) Pledgor shall be entitled to exercise any and all voting and other
consensual rights pertaining to the Pledged Collateral or any part thereof for
any purpose not inconsistent with the terms of this Agreement or the Note; and

         (ii) Pledgor shall be entitled to receive and retain any and all cash
dividends paid in respect of the Pledged Collateral.

     (b) Upon the occurrence of a Default or Event of Default and thereafter
unless expressly waived:

         (i) All rights of Pledgor to exercise the voting and other consensual
rights which Pledgor would otherwise be entitled to exercise pursuant to Section
4.2.(a)(i) and to receive the dividends which Pledgor would otherwise be
authorized to receive and retain pursuant to Section 4.2.(a)(ii) shall cease,
and all such rights shall thereupon become vested in Secured Party who shall
thereupon have the sole right to exercise such voting and other consensual
rights and to receive and hold as Pledged Collateral such dividends.

         (ii) All dividends which are received by Pledgor contrary to the
provisions of Section 4.2.(b)(i) shall be received in trust for the benefit of
Secured Party, shall be segregated from other funds of Pledgor, and shall be
forthwith paid over to Secured Party as Pledged Collateral in the same form as
so received (with any necessary endorsement).

Section 4.3. Remedies Upon Default. If any Event of Default shall have occurred
which has

                                      -3-
<PAGE>   4

not been expressly waived:

     (a) Secured Party may exercise in respect of the Pledged Collateral, in
addition to other rights and remedies provided for herein or otherwise available
to Secured Party, all the rights and remedies of a secured party on default
under the Uniform Commercial Code (the "UCC") in effect in the Commonwealth of
Massachusetts at that time.

     (b) Any cash held by Secured Party as Pledged Collateral and all cash
proceeds received by Secured Party in respect of any sale of, collection from or
other realization upon all or any part of the Pledged Collateral may, in the
discretion of Secured Party be held by Secured Party as collateral for, and/or
then or at any time thereafter applied in whole or in part by Secured Party
against, all or any part of the Obligations in such order as Secured Party shall
elect. Any surplus of such cash or cash proceeds held by Secured Party and
remaining after payment in full of all the Obligations shall be paid over to
Pledgor or to whomsoever may be lawfully entitled to receive such surplus.

                           ARTICLE 5. MISCELLANEOUS.

Section 5.1. Amendments, Etc. No amendment or waiver of any provision of this
Agreement nor consent to any departure by Pledgor herefrom, shall in any event
be effective unless the same shall be in writing and signed by Secured Party,
and then such waiver or consent shall be effective only in the specific instance
and for the specific purpose for which given. No failure on the part of Secured
Party to exercise, and no delay in exercising, any right hereunder shall operate
as a waiver thereof or preclude any other or further exercise thereof or the
exercise of any other right. The remedies provided herein are cumulative and not
exclusive of any remedies provided at law.

Section 5.2. Notices. All notices made or required to be made hereunder shall be
sent by United States first class or certified or registered mail, with postage
prepaid, or delivered by hand to the Pledgor or the Secured Party, as the case
may be, at the respective address first written above. Notice by mail shall be
deemed to have been made on the date when the notice is deposited in the mail.

Section 5.3. Binding Nature. This Agreement shall (a) be binding upon Pledgor,
his heirs, executors, personal representatives and assigns, and (b) inure,
together with the rights and remedies of Secured Party hereunder, to the benefit
of Secured Party's successors, transferees and assigns.

Section 5.4. Governing Law; Terms. This Agreement shall be governed by and
construed and enforced in accordance with the laws of the Commonwealth of
Massachusetts. Unless otherwise defined herein, terms defined in Article 9 of
the Uniform Commercial Code in the Commonwealth of Massachusetts are used herein
as therein defined.

Section 5.5. Headings for Convenience. The underlined or capitalized captions of
this Agreement are for convenience of reference only and shall not be deemed to
define or limit the provisions hereof or to affect their construction or
application.

Section 5.6. Termination. This Agreement shall terminate on the payment in full
of the

                                      -4-
<PAGE>   5

Obligations.

                           [Signature Page to Follow]

                                      -5-
<PAGE>   6

     IN WITNESS WHEREOF, Pledgor and Secured Party have caused this Agreement to
be duly executed and delivered as of the date first above written.

                                     PLEDGOR

                                     ------------------------------
                                     [name]

                                     UNISPHERE NETWORKS, INC.

                                     By: ____________________________
                                      Its: President and Chief Executive Officer

                                      -6-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00020-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00020-of-00352.parquet"}]]