Document:

EXHIBIT 10.1

                                 PROMISSORY NOTE

                                                            Clinton, Mississippi
                                                              September 10, 2001

      FOR VALUE RECEIVED, the undersigned (the "Borrower") hereby
unconditionally promises to pay to the order of WorldCom, Inc., a Georgia
corporation (the "Lender"), in lawful money of the United States of America and
in immediately available funds, any and all amounts properly reflected on the
records of the Lender as having been paid by the Lender under that certain
Limited Guaranty in favor of Bank of America, N.A. (the "Bank") dated as of
February 12, 2001, or any predecessor or successor guaranty, as the same may be
modified, amended or supplemented (the "Guaranty"), whether such payment
occurred before, on or after the date hereof and whether made directly to the
Bank, through the Borrower or otherwise. The Borrower further promises to pay
interest on the outstanding balance under this Note, compounded monthly, until
payment in full of this Note, at a fluctuating rate of interest (the "Normal
Rate") equal to the Eurodollar Rate applicable to each one-month Interest Period
commencing on the date of the first payment by the Lender under the Guaranty
reflected on the records of the Lender plus the Applicable Margin during the
corresponding period applicable to Eurodollar Rate Borrowings by the Lender
pursuant to (i) that certain Amended and Restated 364-Day Revolving Credit and
Term Loan Agreement among the Lender, the Bank, as Administrative Agent, and the
other Lenders identified therein dated as of August 5, 1999, as amended (the
"Original Credit Agreement") which terminated on June 8, 2001, for periods or
portion of a period prior to June 8, 2001, and (ii) that certain Revolving
Credit Agreement among the Lender, the Bank and The Chase Manhattan Bank, as
Co-Administrative Agents, and the other Lenders identified therein dated as of
June 8, 2001, as the same may be amended or replaced (the "New Credit
Agreement"), for periods or portion of a period beginning on or after June 8,
2001; provided, however, that following demand for payment, the Borrower
promises to pay interest on the unpaid balance hereunder, compounded monthly, at
the Default Rate, as defined herein. The "Default Rate" shall be a fluctuating
rate of interest equal to the sum of the otherwise applicable Normal Rate plus
three percent (3%) per annum. Upon each change in the applicable Normal Rate,
the Default Rate shall simultaneously change to correspond with such change in
the Normal Rate. Interest shall be computed on the basis of a 360-day year
consisting of twelve 30-day months.

      From and after June 8, 2001, a reference to the New Credit Agreement shall
be substituted for references to the Original Credit Agreement in each of the
three Promissory Notes by the Borrower payable to the order of the Lender dated
September 8, 2000, November 1, 2000 and December 29, 2000.

      The principal and accrued interest under this Note are payable on demand.
If this Note is not paid upon demand, the Borrower hereby promises to pay all
costs of collection, including but not limited to the fees and expenses of an
attorney and court costs, in addition to the full amount due hereon.

      Interest shall be due and payable under this Note at the Normal Rate or
the Default Rate, as provided herein, after as well as before demand, default
and judgment, notwithstanding any

<Page>

applicable statutory judgment rate of interest. If any interest payment or other
charge or fee payable hereunder exceeds the maximum amount then permitted by
applicable law, then the Borrower shall pay the maximum amount then permitted by
applicable law.

      The Borrower hereby waives presentment, protest and notice of demand,
presentment, protest and nonpayment.

      This Note shall be interpreted and the rights and liabilities of the
parties hereto shall be determined in accordance with the internal laws (as
opposed to the conflicts of law provisions) and decisions of the State of
Mississippi and the Borrower hereby consents to the jurisdiction of the courts
of or in the State of Mississippi in connection with any dispute, controversy,
collection action or other matter relating to or arising out of this Note.
Whenever possible each provision of this Note shall be interpreted in such
manner as to be effective and valid under applicable law, but if any provision
of this Note shall be prohibited by or invalid under applicable law, such
provision shall be ineffective to the extent of such prohibition or invalidity,
without invalidating the remainder of such provision or the remaining provisions
of this Note. Whenever in this Note reference is made to the Borrower or the
Lender, such reference shall be deemed to include, in the case of the Borrower,
a reference to his heirs and legal representatives and, in the case of the
Lender, its successors and assigns. The provisions of this Note shall be binding
upon and shall inure to the benefit of such heirs, legal representatives,
successors and assigns.

                                       /s/ Bernard J. Ebbers
                                       ---------------------------
                                               Bernard J. Ebbers

                                     - 2 -Exhibit 10.1
                                    AGREEMENT
                                 August 21, 2001

This Agreement is entered into as of the date set forth above (the "Effective
Date"), between Aquila Technologies Group, Inc. ("Aquila") and Ambient
Corporation ("Ambient").

1.    SCOPE OF WORK: Aquila will assist Ambient to develop a detailed design for
      a communications controller for Ambient's Powerline telecommunications
      network. The communications controller is expected to be a critical
      component in the home gateway (gw-node), transformer node (x-node) and
      substation node (s-node) portions of the network (the "Development
      Project").

      Specific Contractor and Customer Tasks are contained in the Statement of
      Work, Attachment A hereto (the "SOW").

2.    REPORTS/DELIVERABLES:

      Aquila shall deliver to Ambient, a detailed design of the prototype
      gw-node, x-node and s-node communications controller units (the
      "Products"), in the form of a Critical Design Review (CDR) document.
      Subsequent to acceptance of the CDR and authorization by Ambient, Aquila
      will provide a final schedule and price for delivery of prototypes of the
      Products, all as specified in the SOW.

      Upon acceptance of the prototypes by Ambient ("Deliverable Acceptance")
      the Parties shall enter into discussions regarding the commercialization
      of Products by Aquila and the purchase from Aquila of Products by Ambient.
      Nothing contained herein shall deemed as requiring Ambient to purchase any
      Products from Aquila.

3.    PRICE AND PAYMENT: Payment to Aquila for the Development Project, shall be
      based on time and materials, at Aquila's discounted Labor Categories and
      Rates as shown in Attachment B, less 20%. Payment for the Development
      Project will not exceed $140,000 for labor costs unless otherwise agreed
      to by both parties.

      All materials and outside contract work for the manufacture of the "first
      prototype" shall be prepaid and approved by Ambient before the work is
      released or parts are ordered. After the acceptance of the first
      prototype, any future production will be charged to Ambient under a
      formula where Aquila will institute a 2.0 times mark up for the cost of
      materials and subcontracted labor for the prototypes. For all materials
      and subcontract work, Aquila will provide detailed budget and cost data to
      Ambient. Subsequent to Deliverable Acceptance of the first prototypes the
      2.0 times multiple specified herein for use as mark up for the cost of
      materials and subcontracted labor, will be re-evaluated for the purposes
      of reduction.

      Subject to approval of its Board Ambient shall issue to Aquila 100,000
      warrants for the purchase of Ambient's common stock each at a per share
      exercise price of $1.25 and exercisable for a period of five years from
      the date of grant (the "Warrants") upon the attainment of the following
      milestones:

      (i) 25,000 Warrants shall vest and become exercisable upon Ambient's
      acceptance of the CDR document (ii) 25,000 Warrants shall vest and become
      exercisable upon Deliverable Acceptance of any of the First Protoypes, (as
      defined below) (iii) the remaining 50,000 Warrants shall vest and become
      exercisable upon Deliverable Acceptance of all prototypes specified in the
      SOW.

      For the purposes of this section, "first prototype" shall be defined as
      and include, only the first 50 prototypes of the Products

<PAGE>
                                       2

      Payment for labor shall be invoiced monthly and will be due thirty (30)
      days thereafter.

4.    INTELLECTUAL PROPERTY: Ambient Corporation shall own all intellectual
      property developed under this agreement. For the purposes of this Section
      4, intellectual property shall mean and include all technology included in
      any patents, patent applications, copyrights, copyright applications,
      proprietary technology or know-how, whether developed by Ambient or Aquila
      in support or furtherance of the Development Project (the "Intellectual
      Property").

      Aquila shall not (i) use the Intellectual Property to develop by itself or
      in combination with any third party, any technology that would in any way
      compete with the Development Project, the Products or any Ambient
      powerline telecommunications technology or product (ii) market the
      Intellectual Property or the Products in any form, including without
      limitation, as components or bundled with other technologies or products,
      to any third party, that would in any way compete with the Development
      Project, the Products or any Ambient powerline telecommunications
      technology or product.

      Notwithstanding anything contained herein, Aquila shall have the right,
      subject to written approval from Ambient, to develop and market by itself
      or in combination with any third party any technology or product that does
      not compete with the Development Project, the Products or any Ambient
      powerline telecommunications technology or product but which is an add on
      component to the Products.

      Ambient and Aquila agree to enter into a non-disclosure agreement prior to
      the commencement of the Development Project.

5.    AMBIENT REPRESENTATIVES:

      a.    Ram Rao is Ambient's Chief Network Architect. As Ambient's,
            technical representative, he shall act as liaison between Ambient
            Corporation and the Aquila in technical and contractual matters.

      b.    Brad Dudas is Ambient's Vice President of Strategic Planning. As
            Ambient', business representative, he shall act as liaison between
            Ambient Corporation and Aquila in business matters.

6.    AQUILA TECHNOLOGIES REPRESENTATIVES:

      a.    Tammy Wenderlich is Aquila's Director of Processing Controls. As
            Aquila's technical representative, she will act as liaison between
            the Aquila and Ambient Corporation in technical and contractual
            matters.

      b.    Judy Beckes Talcott is Director of Sales for Aquila Technologies
            Group, Inc. She will manage all sales and marketing issues between
            Ambient and the Aquila.

7.    TRAVEL: All travel will be authorized and agreed to in writing prior to
      commencing. All travel will be coordinated to assure best fare possible.

8.    CANCELLATION:

      a.    Either party may terminate this Agreement with thirty (30) days
            written notice. The termination shall be subject to completion of
            any subcontracted work. In the event of termination, materials
            purchased by or on behalf of Ambient including without limitation
            any work in progress or Products, intellectual property, plans,
            specifications, drawings and other property will be delivered to
            Ambient.

<PAGE>
                                       3

      b.    Unless terminated earlier pursuant to Section 8a, this Agreement
            shall terminate one (1) year from the Effective Date. In the event
            of termination, materials purchased by or on behalf of Ambient
            including without limitation any work in progress or Products,
            intellectual property, plans, specifications, drawings and other
            property, will be delivered to Ambient.

9.    ENTIRE AGREEMENT/GOVERNING LAW: This Agreement, including any Attachment,
      constitutes the entire agreement between the Aquila and Ambient, and is
      governed by the laws of the State of Delaware.

10.   AMENDMENT: No modification, or changes to this Agreement, or waiver of any
      of its provisions, shall be valid unless approved in writing by the duly
      authorized representative of the Parties.

For Ambient Corporation:                For Aquila Technologies Group, Inc.
                                        (The Contractor)

/s/ Mark Isaacson                       /s/ Steve Kadner
-----------------------------------     ----------------------------------------
(Signature)                             (Signature)

Mark Isaacson CEO                       Steve Kadner President
-----------------------------------     ----------------------------------------
(Name and Title)                        (Name and Title)

August 21, 2001                         August 21, 2001
-----------------------------------     ----------------------------------------
(Place and Date)                        (Place and Date)

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00031-of-00352.parquet"}]]