Document:

<PAGE>

                                                                   EXHIBIT 10.13
                                                                   -------------

     AGREEMENT, made as of the 21st day of July, 1999, by and between GLOBIX
CORPORATION (the "Grantor"), having its principal office at 139 Centre Street,
New York, New York 10012 and ARNOLD N. BRESSLER having his principal office at
One Pennsylvania Plaza, New York, New York 10119 (the "Trustee").

                                  WITNESSETH:
                                  ----------

     WHEREAS, the Grantor desires to create an irrevocable trust (the "Trust")
to hold assets pursuant to the Employment Agreement between the Grantor and
Robert B. Bell (the "Participant") dated as of the date hereof (the "Employment
Agreement"), a copy of which is attached hereto as Schedule A; and

     WHEREAS, Grantor desires to name the Trustee, and the Trustee is willing to
serve as Trustee of such Trust;

     NOW, THEREFORE, in consideration of the mutual covenants herein contained
and other valuable consideration, the Grantor and the Trustee agree as follows:

                                      FIRST
                                      -----

     The Grantor shall transfer and convey to the Trustee the amounts of money
deferred under the Employment Agreement which are to be held by the Trustee, IN
TRUST, together with any additional property which the Grantor or any other
person may, from time to time, transfer and convey to the Trustee, for the uses
and purposes and on the terms and conditions hereinafter set forth:
<PAGE>

     A.   The Trust hereby established shall be irrevocable.

     B.   The Trust is intended to be a grantor trust, of which Globix
Corporation is the grantor, within the meaning of subpart E, part I, subchapter
J, chapter 1, subtitle A of the Internal Revenue Code of 1986, as amended, and
shall be construed accordingly.

                                     SECOND
                                     ------

     The Trustee shall hold, manage, invest and re-invest the Trust funds,
collect the income therefrom, and dispose of the income and principal of the
Trust as follows:

     A.   The Trustee shall maintain for the Participant one or more separate
     accounts for the net income and the principal of the Trust to which
     Participant is entitled under the Employment Agreement. The Trustee shall
     pay to Participant from the income, net of all expenses, taxes and costs
     paid by the Trustee, and to the extent the income is insufficient, from the
     principal of the Trust such amount or amounts, and at such time or times,
     as shall be specified in the Employment Agreement. After the Participant's
     death, payments shall be made to the Participant's Designee (as that team
     is defined in the Employment Agreement) in accordance with the terms of the
     Employment Agreement. In clarification of the Employment Agreement, the
     Trustee is instructed as follows:

          i)  In the event the Participant shall die before payments from the
     Trust shall have commenced, the Participant's Designee shall be entitled to
     receive, commencing with the first month after the date of the
     Participant's death, fifty percent (50%) of the payments the Participant
     would have received had the Employment Agreement terminated on the last day
     of the month immediately preceding his death.

          ii) In the event payments shall be made to the Designee, such payments
     shall continue until the earlier to occur of two years after such payments
     commence and the date of the Designee's death.

In the event the preceding clauses (i) and (ii) shall conflict with the
Employment Agreement, the terms of this Agreement shall govern.

     A.   At all times, the principal and income of the Trust, and of all
     separate accounts thereunder, shall be subject to claims of judgement
     creditors of the Grantor. If the Trustee is notified, in writing, that the
     Grantor is insolvent, the Trustee shall not make any payments to the
     Participant and shall dispose of any assets held hereunder only as a court
     of competent jurisdiction may direct to satisfy the claims of the creditors
     of the
<PAGE>

     Grantor. The Grantor shall be deemed to be insolvent if it (i) is unable to
     pay its debts as they mature or (ii) is subject as a debtor to a proceeding
     under the Bankruptcy Code. The Grantor shall notify the Trustee if it is
     deemed to be insolvent within ten (10) days of such notification. Upon the
     receipt of such notice the Trustee shall cease the payment of all benefits
     hereunder and notwithstanding any other provision of this Trust shall hold
     all assets for the benefit of the general creditors of the Grantor.

     B. After the second anniversary of the Participant's death and the death
     of both the Participant and the Designee, the Trustee shall pay to the
     Grantor any trust assets in excess of the amount or amounts to which the
     Participant and the Designee are entitled hereunder.

                                      THIRD
                                      -----

     Neither the Participant nor the Designee shall have any beneficial interest
in principal or income hereunder prior to the time when a payment is due to the
Participant (or the Designee) hereunder. The interest of the Participant (and
the Designee) in amounts payable to the Participant (and the Designee) hereunder
shall not be greater than that of a general creditor of the Grantor. The Trust
assets are not intended to serve as security for payment of benefits under the
Employment Agreement if the Grantor is insolvent (as defined in Subdivision B of
Clause SECOND of this Agreement).

                                     FOURTH
                                     ------

     The Trust shall terminate immediately upon the first to occur of (i) a
final determination that the Participant (or the Designee) must include in his
gross income the value of the Participant's (or the Designee's) interest in the
Trust before the amount representing such interest is actually paid or otherwise
made available to Participant; (ii) a determination by the Board of Directors of
the Grantor that the Grantor will be subject to a penalty for any violation of
any provisions of the Employee Retirement Income Security Act of 1974 ("ERISA");
or (iii) distribution of all of the assets to the Participant (or the Designee)
or to the Grantor in accordance with the Employment Agreement. Upon termination,
under clauses (i) or (ii) above, the assets of the trust shall be distributed to
the Participant or his estate.

                                      FIFTH
                                      -----

     The Trustee shall have, with respect to any and all property at any time
held by it hereunder, and whether constituting principal or income therefrom,
the following powers, in addition to those conferred by law:
<PAGE>

A.   To invest and reinvest in United States Treasury bills and notes, state and
municipal bonds, bank accounts, certificates of deposit and commercial paper
having a grade of BB or better.

B.   To retain any such property as an investment without regard to the
proportion which such property or property of a similar character, so held, may
bear to the entire amount of the Trust.

C.   To sell such property at either public or private sale for cash or on
credit; to exchange such property; and to grant options for the purchase
thereof.

D.   To consent to and participate in any plan of reorganization, consolidation,
merger, combination, or other similar plan, and to consent to any contract,
lease, mortgage, purchase, sale or other action by any corporation pursuant to
such plan.

E.   To deposit any such property with any protective, reorganization or similar
committee, to delegate discretionary power thereto, to pay part of its expenses
and compensation and any assessments levied with respect to such property.

F.   To exercise all conversion, subscription, voting and other rights of
whatsoever nature pertaining to any such property and to grant proxies,
discretionary or otherwise, in respect thereof.

G.   To employ accountants, agents, experts and counsel, including legal and
investment counsel, and to delegate discretionary powers to, and rely upon
information and advice furnished by, such accountants, agents, experts and
counsel and to pay reasonable fees to such accountants, agents, experts and
counsel out of the Trust.

H.   To extend the time of payment of any obligation held by him and to
compromise, settle or submit to arbitration upon such terms as may seem proper,
or to release, any claim in favor of the Trust created hereunder.

I.   From time to time to register any property in the name of his nominee or in
his own name or to hold it unregistered or in such form that title shall pass by
delivery and to place property in a custody or safekeeping account.

J.   To receive additional property from any source and add it to and mingle it
with the Trust created hereunder.

<PAGE>

K.   To make any division or distribution in cash or in other property or
undivided interests therein, or partly in cash and partly in other property or
undivided interests therein.

L.   To make executory contracts and to grant options for any purpose and upon
any terms, and to make such contracts and options binding on the Trust and
enforceable against any property included in the Trust estate.

M.   To pay all taxes, levies, fees (including the Trustee's fees) and other
expenses incurred by or associated with the operation of the Trust.

N.   To do all such acts, take all such proceedings and exercise all such rights
and privileges, although not hereinbefore specifically mentioned, with relation
to any such property, as if the absolute owner thereof, and in connection
therewith to make, execute and deliver any instruments and to enter into any
covenants or agreements binding the Trust under this Agreement.

                                      SIXTH
                                      -----

A.   The Trustee shall not be liable for any loss sustained by the Trust by
reason of the purchase, retention, sale or exchange of any investment made by
the Trustee in good faith.

B.   Persons dealing with the Trustee shall not be obligated to look to the
application of any moneys or other property paid or delivered to the Trustee or
to inquire into the Trustee's authority as to any transaction. All powers
granted to the Trustee shall continue until actual distribution of the property.

C.   Any decision of the Trustee with respect to the exercise or non-exercise by
him of any discretionary power hereunder, or the time or manner of the exercise
thereof, made in good faith, shall fully protect him and shall be binding and
conclusive upon all persons interested in the trust estate.

D.   The Trustee shall not be required to sell stock, securities or other trust
assets if the sole purpose of such sale is to diversify the investment of the
trust principal and the Trustee otherwise believes such stock, securities or
other trust assets to be a prudent investment. The Trustee shall incur no
liability whatsoever by reason of any action taken or not taken pursuant to the
provisions of this Division D except for gross negligence or wilful misconduct.
<PAGE>

                                     SEVENTH
                                     -------

A.   If the Trustee shall die, resign or cease to act for any reason, the
Grantor shall appoint a successor Trustee by an acknowledged writing within ten
(10) days after the Trustee shall die, resign or so cease to act. Under no
circumstances shall the Grantor act as a Trustee hereunder.

B.   A Trustee may resign at any time upon thirty (30) days' prior written
notice to the Grantor and any co-Trustee. In the event a Trustee, or a successor
Trustee, resigns, he or it shall be relieved of all further liability hereunder
other than to account for all property received while acting as Trustee and, if
applicable, to turn over such property to a successor Trustee.

C.   No successor Trustee shall be liable or responsible in any way for the acts
or defaults of any predecessor Trustee, nor for any loss or expense caused by
anything done or neglected to be done by any predecessor Trustee, but such
successor Trustee shall be liable only for its own acts and defaults with
respect to the trust funds actually received by it as Trustee. Every successor
Trustee shall be vested with all the duties, rights, titles, and powers, whether
discretionary or otherwise, of the original Trustee. No Trustee or successor
Trustee shall be required to give any bond or other security for the faithful
performance of its duties as such.

                                     EIGHTH
                                     ------

     This Agreement and the trust hereby created may be amended any time and to
any extent by written instrument executed by the Trustee and Grantor and
consented to by the Participant (or if the Participant is dead, the Designee)
except to make the Trust revocable after receipt of a favorable determination
letter from the Internal Revenue Service regarding the status of this trust as a
"rabbi trust" or to alter Article 4.

                                      NINTH
                                      -----

     The Participant's interest in income or principal hereunder shall not be
subject to anticipation, assignment, pledge, sale or transfer in any manner, nor
shall the Participant have the power to anticipate, encumber or change such
interest, nor shall such interest, while in the possession of the Trustee, be
liable for or subject to the debts, contracts, obligations, liabilities or torts
of Participant.
<PAGE>

                                      TENTH
                                      -----

     A. At least annually, the Trustee shall deliver to the Grantor and the
Participant a written description of all administration expenses (including the
Trustee's fees) incurred by the Trustee during the period in question. All of
the Trustee's administration expenses (including the Trustee's fees) shall be
paid by the Trust; the Trustee shall withdraw any amounts from the Trust to
compensate or reimburse himself for his administrative expenses and the
Trustee's fees.

     B. The compensation to which the Trustee is entitled shall be calculated by
multiplying (x) the number of hours devoted to managing the Trust by (y) his
normal hourly billing rate as the same shall change from time to time.

                                    ELEVENTH
                                    --------

     A. Wherever necessary or appropriate, the use herein of any gender shall be
deemed to include the other genders and the use herein of either the singular or
the plural shall be deemed to include the other.

     B. This Agreement may be executed and delivered (including by facsimile
transmission) in one or more counterparts, each of which when executed and
delivered shall be deemed to be an original but all of which taken together
shall constitute one and the same agreement.

                                     TWELFTH
                                     -------

     This Agreement shall become effective, as of the day and year first above
written, upon the execution of this Agreement by both the Grantor and the
Trustee. It shall be governed and construed in all respects according to the
laws of the State of New York.

     IN WITNESS WHEREOF, the Grantor and the Trustee have hereunto set their
hands.

Attest:                                  GRANTOR:

                                         Globix Corporationq

By: /s/                               By: /s/
   -----------------------------         ----------------------------
         Paul Asher, Secretary           Marc H. Bell, President

[SEAL]

Witness:                                 TRUSTEE:

 /s/                                      /s/
--------------------------------         ----------------------------
<PAGE>

           (Name)                   Arnold N. Bressler, Trustee

Approved:

                                        Witness:

/s/                                     /s/
   ---------------------------             ----------------------------
      Robert B. Bell       (Name)
<PAGE>

STATE OF NEW YORK )
                  ) ss.:
COUNTY OF NEW YORK         )

     On the ____ day of __________, 1999, before me personally came Marc H.
Bell, to me known who being by me duly sworn, did depose and say: that he is the
President of Globix, the corporation described in and which executed the
foregoing instrument; that he knows the seal of said corporation; that the seal
affixed to said instrument is such corporate seal; that it was so affixed by
order of the Board of Directors of said corporation, and that he signed his name
thereto by like order.

                           -----------------------------------
                                  Notary Public

STATE OF NEW YORK )
                  ) ss.:
COUNTY OF NEW YORK         )

     On the ____ day of __________, 1999, before me personally came Arnold N.
Bressler, to me known and known to me to be the individual described in and who
executed the foregoing instrument and he acknowledged to me that he executed the
same.

                           -----------------------------------
                                  Notary Public

STATE OF NEW YORK )
                  ) ss.:
COUNTY OF NEW YORK         )

     On the ____ day of __________, 1999, before me personally came Robert B.
Bell, to me known and known to me to be the individual described in and who
executed the foregoing instrument and he acknowledged to me that he executed the
same.

                           -----------------------------------
                                  Notary Public

     SCHEDULE A
     ----------

     Employment Agreement by and between Globix Corporation and Robert B. Bell.<PAGE>

                                                                   EXHIBIT 10.15
                                                                   -------------

August 31, 2000

Alfred G. Binford
[address]
[address]

Dear Alfred,

Welcome to Globix Corporation! The following encompasses our offer to you:

Title and Reporting:
--------------------

This will confirm our offer for the initial full-time exempt position, based in
New York City, of President - Streaming Services, reporting to Marc Jaffe, COO.
Your start date will be on or about October 2, 2000. Notwithstanding this start
date, you will endeavor to be available to Globix for approximately four days
during the month of September. Globix is in the process of making investments to
become a leading provider of streaming media broadcasting services. As such, in
this position you will be responsible for managing this business unit and
expected to build a management team, given the resources to recruit appropriate
technical staff, a sales and marketing organization, and an operational group
(e.g., Directors of Sales, Operations, Product/Applications and Business
Development and their respective organizations).

After accomplishing those goals, you would find your own replacement for that
organization and then, management would recommend to the Board of Directors of
Globix Corporation your appointment to the senior corporate officer position of
President of Globix Corporation with direct responsibility for Sales, Marketing,
and Corporate Communications (other than investor relations and related matters)
worldwide. This position would report to Marc H. Bell, Chairman & CEO. We
anticipate this initial stage of your employment and the subsequent reassignment
(promotion) would occur within ninety (90) days.

Compensation:
-------------

Your salary will be $9,375.00 payable semi-monthly ($225,000.00 annualized).

You will have a performance bonus target of $113,000.00, payable annually (after
Globix' fiscal 2001 year-end) and measured by mutually agreed financial metrics
and goal achievement against business plans.

You will receive a taxable "signing bonus" of $60,000, payable within the first
month of employment. This payment will also serve to compensate you for any
services rendered during September.

All compensation is subject to applicable payroll and withholding taxes.

Stock Options:
--------------

Your acceptance will provide you with a grant of options to purchase 100,000
shares of freely tradeable (subject to vesting provisions and insider window
period restrictions) Globix common stock, granted at Fair Market Value, as
defined by and in accordance with Globix's Stock Option Plan. Copies of the 1999
Globix Stock Option Plan and the form of Option Grant Agreement have been sent
to you separately. This grant is effective on your start date.

You have represented to Globix that, since February 29, 2000, you have not been
granted stock options by any company (excluding Globix and Real Networks) which
have not been canceled and which may vest or be exercisable at some date after
February 29, 2000.
<PAGE>

During your continued employment with Globix, Globix will assure a pre-tax value
of not less than $2,000,000 (measured by including the value of the vested
Globix option shares on the market) as of the point in time when 40% of the
option grant shall have vested (the second anniversary of the grant of such
options). Globix may (at Globix's sole discretion) provide such value assurance
by making a cash payment, by a distribution of shares of "freely tradeable"
common stock.

If your employment is terminated by Globix for cause (as defined below) or by
you for any reason, the aforementioned value assurance shall terminate. In the
event that your employment is terminated by Globix without cause prior to your
second anniversary of employment, the above mentioned value assurance by making
a cash payment, by a distribution of shares of "freely tradeable" common stock.
or by accelerating the vesting of then-unvested options.

In addition, if at any time up to and including the second anniversary of said
option grant, the in-the-money value of vested options granted to you (by
Globix), including the value at such time of any such options previously
exercised, equals or exceeds $2,000,000, then from such time and thereafter, the
aforementioned value assurance shall terminate.

Benefit Programs:
-----------------

You will earn 15 days vacation per year and sick leave according to Globix's
policies then in effect.

Effective the first day of the month following your date of hire with Globix,
you will be eligible for Globix Corporation's benefits package including family
coverage for medical, dental and hospitalization and life insurance, long term
and short term disability insurance for you. You will be eligible to join the
401(k) plan as defined by the terms of the trust fund document in effect. Your
benefits will be discussed in detail during an orientation your first week of
employment.

All Globix Corporation benefit programs are subject to modification by Globix in
its sole discretion. You shall, however, remain eligible for all then-currently
available benefit programs for similarly situated employees and/or senior
executives.

Your probationary period will be 90 days. Your employment will be terminable at
will, either by you or us at any time for any reason.

Globix Corporation makes this offer of employment in part based upon your
representation to Globix that you are not restrained, encumbered or limited in
any way in the performance of duties under this offer of employment by any
contract, covenant or other document or agreement in any form whatsoever which
might (i) limit or prevent your employment; (ii) restrict your activities by
virtue of a "non-competition clause" or other similar provision; (iii) purport
to retain ownership over inventions, discoveries, designs and the like which you
may produce or engage in during any period of employment by Globix; or (iv) in
any other manner affect Globix's interests in the work product to be performed
by you.

Additionally, in the event that your employment by Globix Corporation should
result in a claim, determined to be valid by a court of appropriate jurisdiction
or settled with your consent, against Globix by any former employer of you, you
agree to indemnify and hold Globix harmless against any such claim, loss,
damage, expense or liability that Globix may suffer or incur. Such
indemnification may be provided, at Globix's discretion, as an offset or
reduction to the amount of value assurance that Globix has agreed to provide
with respect to the stock options granted to you (see Stock Option section of
this letter agreement).

This is not an employment contract. It does not guarantee employment with or
benefits from Globix Corporation or its subsidiaries. All offers are contingent
upon satisfactory completion of reference and background checks. Additionally,
no details or announcements regarding this agreement can be disclosed prior to
your start date without the expressed written consent of both you (A. G.
Binford) and authorized Globix representatives.
<PAGE>

On behalf of everyone at Globix, I want to welcome you to our Company. I am
certain that you will be an asset to our team and we look forward to working
with you. Please contact me in regard to any questions you may have regarding
this offer. I can be reached at [telephone #].

Sincerely,

Globix Corporation

By: /s/ Marc H. Bell
    -----------------------
    Marc H. Bell
    Chairman and Chief Executive Officer

Agreed By:   /s/ Alfred G. Binford
           ---------------------------------
                 Alfred G. Binford

Date:    9/5/00
       --------------------

Addendum to Letter Agreement dated August 31, 2000 between Globix Corporation
and Alfred Binford

Definition of "Termination by Company for Cause"

Cause shall include, with respect to other than immaterial matters,
insubordination, a knowing violation of a state or federal law involving the
commission of a crime against the Company or any of its affiliates or any
felony, any misrepresentation, deception, fraud or dishonesty that is materially
injurious to the Company or any of its affiliates, incompetence, moral
turpitude, the refusal to perform the duties and responsibilities of one's
position for any reason other than illness or incapacity, and any other material
misconduct of any kind

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