Document:

<PAGE>

                                                                   Exhibit 10.15

                                             [AIRSPAN LOGO APPEARS HERE]

                                             AirSpan Networks Inc.

                                             13450 West Sunrise Blvd., Suite 430
                                             Sunrise Florida 33323, USA

                                             Tel: 001 954 851 1660
                                             Fax: 001 954 851 1661
                                             http://www.airspan.com

22 August 2002

Private and Confidential

Peter Aronstam
Chief Financial Officer
Airspan Networks Inc.

Dear Peter

Following your discussions with Eric Stonestrom, I would like to confirm the
following changes to your contract of employment:

Salary

Effective from 1 October 2002 your base salary will be reduced to $200,000 per
annum. Your next salary review will take place on 1 April 2003.

Sales Bonus

For Q4/02 and Q1/03 if we reach $2M on America's booked quarterly revenues, you
will be paid a bonus of $20,000 for each quarter that we achieve this revenue.
This bonus will be payable 15 days after the filing of the 10Q. After this
period the revenue target will be reviewed and agreed by the 15th day of each
subsequent quarter.

This sales bonus will be in addition to any other bonus scheme implemented for
company officers. Any other bonus scheme will take trailing 12 months salary +
sales bonus as the reference level.

Employment Security

With reference to Paragraph 5, Employment Security of your original contract of
employment, any severance pay would be calculated on either your current 12
month trailing salary + sales bonus or your base salary at the start of your
employment, whichever is the greater.

<PAGE>

All other terms and conditions remain unchanged.

Yours sincerely,

/s/ Barbara Sheard
--------------------------
Barbara Sheard
Director, Human Resources

I acknowledge receipt of the original copy of the above letter and confirm that
I accept this change to my employment contract.

Signed:       Peter Aronstam            Date:   September 30, 2002
        ---------------------------           ----------------------
             (Peter Aronstam)

  Please sign both copies of this letter and return one to Human Resources at
                                    Uxbridge<PAGE>
                                                                   Exhibit 10.16

                                                             [AIRSPAN LOGO HERE]

                                        February 8th, 2001
Henrik Smith Petersen
Airspan Networks Inc.

Dear Henrik,

This letter confirms the recent change to your employment status. Effective
January 31st, you have been promoted to the Executive Level Team, the group of
company executives most responsible for the corporation's performance and
direction. Congratulations on this appointment.

In addition, I confirm your appointment as Regional President -- Asia Pacific,
in recognition of the major contribution you have made in developing the region
from a standstill in 1998 to the position where Airspan is the market leader.
You should be truly proud of this accomplishment.

Commensurate with this change in your status, we are extending the basic
compensation package as follows:

1)   a new grant of 175,000 shares, priced at the close of market on February
     7th ($4.375) has been ratified by the Board of Directors. These shares will
     vest under the conditions of the 1998 Airspan Employees Stock Option
     program and the effective date of grant is February 7th, 2001.

2)   effective immediately, the institution of a 9 months base pay severance
     (taxes are your responsibility) in the unlikely event of a company
     initiated termination without cause. You will also be entitled to receive
     commissions on the Asia business on the books at the time of your departure
     for the following nine months.

3)   An upwards adjustment to your base salary of 15,000 Sterling, to 135,000
     Sterling per annum, to be adopted in the annual performance review and
     salary adjustment to take effect April 1st, 2001.

<PAGE>

4)   A modification to the Airspan Sales Bonus program, as follows:

        - basic payout on a quarterly basis as per the plan used in 2000 for the
          sales activity in the region.
        - The year 2001 quota for the region is $24M.
        - An additional compensation, to be paid Feb 1, 2002 to you as follows
          for the performance of your team:
          - Year 2001 revenue (greater than) $31.625M -- A 25% of base pay lump
            sum (taxes are your responsibility)
          - Year 2001 revenue (greater than) $36M -- A 50% of base pay lump sum
            (taxes are your responsibility)
          - Year 2001 revenue (greater than) $48M -- A 100% of base pay lump sum
            (taxes are your responsibility)
          - Year 2001 revenue (greater than) $60M -- A 150% of base pay lump sum
            (taxes are your responsibility)

I also confirm that we will be paying you a $35,000 taxable bonus in accordance
with the Beat Floware initiative instituted last fall upon payment of the Beltel
down payment and achievement of first site sign-off, as per the provisions of
the program.

I also confirm your appointment to the Board of the Australian legal entity.

Again, my congratulations on the great success to date and this recent change in
status.

                                                     Sincerely,

                                                     /s/ Eric Stonestrom
                                                     ----------------------
                                                     Eric Stonestrom
                                                     President and CEO
                                                     Airspan Networks Inc

Cc:

Kent Carlson - Acting Secretary
Barbara Shead - Human Resources

<PAGE>

Sevin Rosen                                                Two Galleria Tower
Funds                                                      13455 Noel Road
                                                           Suite 1670, LB-5
                                                           Dallas, Texas 75240
                                                           (972) 702-1100
                                                           (972) 702-1103 Fax

January 22, 1998

Mr. Henrik Smith-Petersen
c/o DSC Communications LTD
5 New Square, Feltham
Middlesex TW14 8HA
United Kingdom

Dear Henrik:

Per your discussions with Eric Stonestrom, I would like to confirm our intent
relative to your position and compensation. In the event our deal with DSC is
executed, we intend to offer you the position of Director, Network Management in
Airspan Communications LTD. You will initially report to Eric.

Your base salary of 70,000 (pounds) and related benefits will continue as per
the current arrangement with DSC. In the future, with your assistance, we will
implement an incentive program as a supplement to your base salary. In addition
to this cash compensation, you will be provided the option to purchase up to
150,000 shares of Airspan Communications Corporation common stock. Twenty-five
percent of this option will vest after the first full year. The remaining 75%
will vest in equal monthly increments over the following three years.

In addition, you will be asked to execute a Proprietary Information Agreement
that will be requested from all employees. In the unlikely event that your
employment terminates involuntarily in the first year, you will receive six
months of your base salary as severance.

Henrik, I am personally looking forward to working with you. I am excited about
the challenge, the fun and the rewards in making Airspan Communications
Corporation a success.

Sincerely,

/s/ Thomas S. Huseby                     ACKNOWLEDGED:
-----------------------                                -------------------------
Thomas S. Huseby                                       Henrik Smith-Petersen
Chairman
Airspan Communications Corporation       DATE:
                                               ---------------------------------

cc: Eric D. Stonestrom<PAGE>

                                                                   Exhibit 10.17

                                                                  [AIRSPAN LOGO]

15 February 2001

Private and Confidential

David Brant
Airspan Communications Ltd

Dear David

Congratulations on your appointment to the Executive Level Team. I would like to
confirm that the board of directors has ratified a grant of 75,000 share options
for you at the close of market price on February 7th, 2001, under the normal
terms of the 1998 Airspan Stock Option Plan. Human Resources will  be forwarding
documentation related to this grant shortly. Furthermore, as a member of the
Executive Level Team, you are entitled to 9 months of severance in the unlikely
event that your employment is terminated without cause.

I would also like to confirm that an increase to your base salary of 6700
Sterling has been approved to be incorporated in the April 1st pay adjustment.

Your handling of the Alcatel issue is deserving of specific recognition and
exceeds even the high standards which you have established for the department.
I am delighted to inform you that Airspan is paying you a bonus of 6000
Sterling, grossed up for taxes, in recognition of your work in bringing the
Alcatel bond to closure. This bonus will be paid immediately and hopefully can
offset some of the cost of a well deserved vacation.

Yours sincerely

/s/ Eric Stonestrom
---------------------
Eric Stonestrom
President and CEO

Cc: Barbara Shead

<PAGE>

July 13, 2000                                     (Airspan Logo Appears Here)
                                                  Airspan Communications Limited
PRIVATE & CONFIDENTIAL                            Cambridge House, Oxford Road
                                                  Uxbridge Middlesex UBB 1UN UK
                                                  Tel: +44 1895 467 100
David Brant                                       Fax: +44 1895 467 101
Airspan Communications Ltd                        http://www.airspan.com

Dear David

I am pleased to confirm that effective 21st June 2000 you are promoted to
Vice President and Controller reporting to the Senior Vice President and CFO.
Also with effect from 21st June your base salary has increased to
93,600(pounds); representing a 12.37% increase.

The remainder of your terms and conditions remain unchanged.

It only remains for me to offer my congratulations on your promotion, and I look
forward to working with you in your new role.

Yours sincerely

/s/ H. Coogan
------------------------
Hilary Coogan
HR Manager

<PAGE>

Sevin Rosen                                                  Two Galleria Tower
Funds                                                        13455 Noel Road
                                                             Suite 1670, LB-5
                                                             Dallas, Texas 75240
                                                             (972) 702-1100
                                                             (972) 702-1103 Fax

January 21, 1998

Mr. David Brant
c/o DSC Communications LTD
5 New Square, Feltham
Middlesex TW14 8HA
United Kingdom

Dear David:

Per your discussions with Eric Stonestrom, I would like to confirm our intent
relative to your position and compensation. In the event our deal with DSC is
executed, we intend to offer you the position of Director of Finance in Airspan
Communications LTD. You will initially report to Eric.

Your base salary of 54,450 (pounds) and related benefits will continue as per
the current arrangement with DSC. In the future, with your assistance, we will
implement an incentive program as a supplement to your base salary. In addition
to this cash compensation, you will be provided the option to purchase up to
100,000 shares of Airspan Communications Corporation common stock. Twenty-five
percent of this option will vest after the first full year. The remaining 75%
will vest in equal monthly increments over the following three years.

In the unlikely event that your employment terminates involuntarily in the first
year, you will receive six months of your base salary as severance.

David, I am personally looking forward to working with you. I am excited about
the challenge, the fun and the rewards in making Airspan Communications
Corporation a success.

Sincerely,

/s/ Thomas S. Huseby
-------------------------
Thomas S. Huseby                         AGREED:
Chairman                                        ------------------------------
Airspan Communications Corporation                      David Brant
                                         DATE:
                                                ------------------------------

cc: Eric D. Stonestrom

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00049-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00049-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00049-of-00352.parquet"}]]