Exhibit 10.16

MASTER AGREEMENT FOR PRODUCTS AND SERVICES

This Master Agreement for Products and Services ("Agreement") is entered into effective as of the 14th day of May 2004 ("Effective Date"), by and between
E.F. Johnson Company located at 1440 Corporate Dr., Irving, TX 75038 ("Johnson") and McDonald Technologies International Inc., a Texas corporation located at 1920 Diplomat Drive, Farmers
Branch, Texas 75234 ("Supplier"). (Johnson and Supplier are, collectively, referred to as the "Parties" or individually, as a "Party.")

Johnson
and Supplier, in consideration of the mutual agreements contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged,
and intending to be legally bound, agree as follows:

ARTICLE 1GENERAL TERMS AND CONDITIONS

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ARTICLE 2MANUFACTURING

|  |  |   |  |                                                                                      |  |                                        |  | COMPLETION DATES                                                                                                                                                                                                                  
|- |  | - |  | ------------------------------------------------------------------------------------ |  | -------------------------------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|A |  | 1 |  | Sub-assemblies for 5100 series projects                                              |  | Within 1 week after the Effective Date |  | As per the Transfer Plan with first articles for at least one product to be shipped within 6 weeks after the Effective Date (Johnson to promptly test and respond within a target of 2 weeks or less ("First Article
Acceptance"))
|  |  | 2 |  | Sub-assemblies for 5300 series projects                                              |  | 2 weeks after the Effective Date       |  | As per the Transfer Plan with first articles for at least one product to be shipped within 12 weeks after the Effective Date                                                                                                      
|  |  | 3 |  | Sub-assemblies for Infrastructure Family (includes 2600 series) projects             |  | 8 weeks after the Effective Date       |  | As per the Transfer Plan with first articles for at least one product to be shipped within 26 weeks after the Effective Date                                                                                                      
|B |  | 5 |  | Final Product  Test services and box-level assembly for all aforementioned products |  | October 31, 2004                       |  | Not later than November 30, 2004                                                                                                                                                                                                  
|C |  | 6 |  | Final integration and direct-ship services for all projects                          |  | n/a                                    |  | Not later than December 31, 2004                                                                                                                                                                                                  

ARTICLE 3PRICES AND PAYMENTS



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ARTICLE 4ENGINEERING CHANGE ORDERS

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ARTICLE 5MANUFACTURING DATA

ARTICLE 6ORDER AND DELIVERY

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|Days Before Scheduled Delivery Date |  | Suppler Accelerated Commitment                                                                                                                                      
|----------------------------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------
|030                                |  | 0%                                                                                                                                                                  
|3160                               |  | 25%                                                                                                                                                                 
|6190                               |  | 50%                                                                                                                                                                 
|91120                              |  | 100%                                                                                                                                                                
|> 120                               |  | No Acceleration Restrictions  Johnson may delay delivery of all or part of a Final Order Purchase Order, or otherwise cancel all or portion of that Purchase Order.

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|Days Before Scheduled Delivery Date |  | Quantity Allowed to be Rescheduled                      
|----------------------------------- |  | --------------------------------------------------------
|030                                |  | 0%                                                      
|3160                               |  | 0%                                                      
|6190                               |  | 50%                                                     
|91120                              |  | 100%                                                    
|> 120                               |  |  Cancelable subject to Stock Repurchase (defined below)

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|Days Before Scheduled Delivery Date |  | Quantity Allowed to be Rescheduled                                                                                                                     
|----------------------------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------
|030                                |  | 0%                                                                                                                                                     
|31+                                 |  | No Restrictions  Johnson may delay delivery of all or part of a Final Order Purchase Order, or otherwise cancel all or portion of that Purchase Order.

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ARTICLE 7INVENTORY

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ARTICLE 8TERM

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ARTICLE 9WARRANTIES AND REPAIRS

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ARTICLE 10DEFINITIONS AND INTERPRETATION

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ARTICLE 11CONFIDENTIALITY

ARTICLE 12RELATIONSHIP OF THE PARTIES

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ARTICLE 13WORK PRODUCT

ARTICLE 14FORCE MAJEURE

ARTICLE 15DAMAGES AND LIMITATION OF LIABILITY

ARTICLE 16COMPLIANCE WITH LAW, SAFETY REQUIREMENTS AND POLICIES

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ARTICLE 17INDEMNITIES



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ARTICLE 18INSURANCE

Supplier
agrees to procure and maintain, and to require its Subcontractors to procure and maintain, insurance coverage in the kinds and amounts and with the terms and conditions as set forth in
Exhibit C. All Supplier's insurance policies shall name the Johnson as an additional insured, and all casualty insurance or business interruption insurance policies shall name Johnson as a loss
payee.

ARTICLE 19PROHIBITED PAYMENTS

ARTICLE 20MISCELLANEOUS

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ARTICLE 21ALTERNATIVE DISPUTE RESOLUTION

ARTICLE 22NOTICE

Wherever
in this Agreement provision is made for the giving of notice, consent or approval by any Person, such "Notice" shall be sufficient only when delivered personally by confirmed facsimile, by a
major commercial rapid delivery courier service or mailed by certified mail, return receipt requested. Notices to the Parties shall be sent to the Parties below at the address indicated or to such
other address as may be directed in writing by the Party seeking to receive Notice. Notice is deemed to be effective ("Effective Date") (i) if by certified mail or courier when received on the
date "signed for" by a representative of the receiving Party; and (ii) if by confirmed facsimile when received at the time sent or the next working day if such time is not during normal
business hours, which shall be 8 am to 5 pm, Central Standard Time, Monday through Friday, recognized national holidays excepted. If multiple Notices are sent, the first such Notice confirmed by any
method above shall establish the Effective Date.

|If to Johnson: |  | E.F. Johnson Company
Attn: Director, Outsourcing
1440 Corporate Drive
Irving, TX 75038
Facsimile: 972-819-0639
|-------------- |  | --------------------------------------------------------------------------------------------------------------

Invoices shall be sent to the address as directed in the Purchase Order.

If
to Supplier:

Purchase
Orders shall be directed as follows to:

or
at such other address as either Party shall designate by written notice to the other. Either Party may change its address or facsimile number by giving notice of such change in accordance with
herewith.

ARTICLE 23ACKNOWLEDGMENT

Each Of The Parties Hereto Specifically Acknowledges And Agrees (1) That It Has A Duty To Read This Agreement And That It Is Charged With Notice And Knowledge Of The
Terms Hereof, And (2) That It Has In Fact Read This Agreement And Is Fully Informed And Has Full Notice And Knowledge Of The Terms, Conditions And Effects Of This Agreement. Each Party Hereto
Further Agrees That It Will Not Contest The Validity Or Enforceability Of Any Such Provisions Of This

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Agreement On The Basis That The Party Had No Notice Or Knowledge Of Such Provisions Or That Such Provisions Are Not "Conspicuous".

This Agreement may be executed in multiple counterparts (including facsimile signatures), each of which will be an original instrument, and all of which will constitute the
Agreement which is effective as of the Effective Date and is executed as of the date indicated below each signature.

[THE REST OF THIS PAGE LEFT BLANK INTENTIONALLY]

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IN
WITNESS WHEREOF, the Parties have caused this Agreement to be executed by their duly authorized officers as of the day and year set forth below.

|E.F. Johnson Company                   |  | McDonald Technologies International, Inc.
|-------------------------------------- |  | -----------------------------------------
|Johnson:                               |  | SUPPLIER:                                
|By: /s/ Massoud Safavi
    (Signature) |  | By: /s/ Pip Sivakumar
    (Signature)    
|(Printed/Typed Name)                   |  | (Printed/Typed Name)                     
|(Title)                                |  | (Title)                                  
|May 14, 2004
(Date)                    |  | May 14, 2004
(Date)                      
|                                       |  | Supplier's Legal Status:                 

Supplier is a                        formed under the laws of, and
in good standing in,                        .

| |  | Supplier's Taxpayer Identification Number or Social Security Number:
| |  | --------------------------------------------------------------------
| |  |                                                                     
| |  | Supplier's CORPORATE ADDRESS:                                       
| |  | (Street)                                                            
| |  | (Box)                                                               
| |  | (City/State/Zip Code)                                               
| |  | (Telephone Number)                                                  
| |  | Supplier's State License No.
(where required by state law):         
| |  |                                                                     

The following attached exhibits, as may be modified from time to time, are attached to this Agreement and are incorporated by reference:

Exhibit A
Initial Purchase Prices

Exhibit B
Initial Inventory

Exhibit C
Insurance

Exhibit D
Arbitration Provisions

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