Document:

INFOCROSSING, INC. AND SUBSIDIARIES
                                  EXHIBIT 10.6A

                           TENTH FLOOR OPTION AGREEMNT

         AGREEMENT made as of the 30th day of November, 1999, by and among G-H-G
REALTY COMPANY, L.L.C., a limited liability company formed in accordance with
the laws of the State of New York (successor to G-H-G Realty Company, a
partnership), having an office at 360 West 31st Street, New York, New York 10001
(hereinafter referred to as "Landlord"); RSL COM U.S.A., INC., a Delaware
corporation, having an office at 430 Park Avenue, New York, New York 10022
(hereinafter referred to as "Subtenant"); and COMPUTER OUTSOURCING SERVICES,
INC. (formerly known as Commercial Online Systems, Inc.), a Delaware corporation
having an office at 2 Christie Heights Street, Leonia, New Jersey 07605
(hereinafter referred to as "COSI").

                              W I T N E S S E T H:

         WHEREAS, the Landlord previously entered into an Agreement of Lease
dated January 24, 1991 with COSI with respect to certain space on the Tenth
(10th) and Eleventh (11th) Floors and certain basement space in the building
known as 360 West 31st Street, New York, New York (the "Building") (the said
Agreement of Lease together with five (5) separate supplemental agreements by
and between the parties thereto being collectively referred to herein as "the
Lease"); and

         WHEREAS, COSI thereafter entered into an Agreement of Sublease dated
July 1998 with the Subtenant (the "Sublease"), pursuant to which COSI sublet to
Subtenant the entire Eleventh (11th) Floor of the Building (the "Eleventh Floor
Premises") consisting of approximately 22,300 rentable square feet and part of
the Tenth (10th) Floor (the "Tenth Floor Premises") of the Building, consisting
of approximately 9,200 rentable square feet (the Eleventh Floor Premises and the
Tenth Floor Premises being collectively referred to herein as the "Demised
Premises"); and

         WHEREAS, Subtenant, as a condition of Landlord's consent to Sublease,
agreed to be subject and subordinate at all times to all covenants, agreements,
terms, provisions and conditions of the Lease and of a certain Consent to
Sublease dated September 14, 1998 (the "Consent"); and

         WHEREAS, the parties have entered into a certain agreement of even date
herewith (the "Eleventh Floor Option Agreement") pursuant to which COSI and
Subtenant have granted to Landlord an option (the "Eleventh Floor Option") to
take back the Eleventh Floor Premises, which option shall expire on December 3,
1999 (the "Eleventh Floor Option Expiration Date"); and

         WHEREAS, Landlord has requested an option to take back the Tenth Floor
Premises, and COSI and Subtenant desire to grant such option to Landlord on the
terms and conditions set forth herein.

         NOW, THEREFORE, in consideration of the mutual obligations of the
parties hereto, and other good and valuable consideration, receipt of which is
acknowledged by each of them, the parties hereby covenant and agree as follows:

         1. Grant of Option. Subtenant and COSI hereby grant Landlord the option
(the "Tenth Floor Option"), expiring on February 15, 2000 (the "Tenth Floor
Option Expiration Date") to take back the Tenth Floor Premises.

                                     X - 4
<PAGE>
         2. Manner of Exercise. The Tenth Floor Option may be exercised only by
delivery of written notice of such exercise to Subtenant and COSI prior to the
Tenth Floor Option Expiration Date. Such notice shall be deemed given on the
date of actual receipt thereof by Subtenant and COSI (such date being referred
to herein as the "Tenth Floor Option Exercise Date").

         3.       Consideration.   In  the  event  that  the  Landlord   elects
                  -------------
to exercise the Tenth Floor Option, Subtenant shall pay the total sum of Eighty
Seven Thousand ($87,000.00) Dollars, ("Consideration") as follows:

a.       To the Landlord, the sum of Twelve Thousand Dollars ($12,000.00);

b.       To S.L. Green Leasing, Inc., the sum of Fifty Two Thousand Five Hundred
Dollars ($52,500.00);

c.       To COSI, the sum of Twenty Two Thousand Five Hundred Dollars
($22,500.00).

         4.       Payment.        The aforementioned payments shall be made
                  -------
within five (5) business days after receipt by Subtenant and COSI of notice of
exercise of the Tenth Floor Option. If such payments are not timely made, they
shall accrue interest at the highest rate permitted by law. In the event that
Landlord, COSI, or S.L. Green Leasing, Inc. as the case may be, is required to
expand any sums, including but not limited to reasonable legal fees, to collect
any such payment, Subtenant shall, in addition to all other payments required
hereunder, be liable for all such costs and expenses.

5.       Termination of Sublease; Mutual Release.
         ---------------------------------------

A.       The Sublease shall automatically be deemed cancelled and terminated in
full, effective as of the Tenth Floor Option Exercise Date, and Subtenant shall
have no further liability whatsoever to COSI or Landlord as of the Tenth Floor
Option Exercise Date, arising out of the Sublease, the Lease, the Consent or
otherwise, all of which liabilities are hereby released, except for rent or
other obligations under the Sublease accruing prior to the Tenth Floor Option
Exercise Date and the Consideration payment obligations set forth herein.

                  B. Effective as of the Tenth Floor Option Exercise Date,
Subtenant releases COSI from all liability under the Sublease, except for
obligations or liabilities of COSI accruing thereunder on or after December 1,
1999.

         6. COSI Liability. Upon the Tenth Floor Option Exercise Date, COSI
shall continue to be liable for the rent and additional rent due under the Lease
but for no other obligations thereunder, the Landlord releasing COSI from all
claims, obligations, actions, suits and the like under the Lease except COSI's
liability for the rent and additional rent thereunder as limited herein and
except for obligations under the lease, if any, arising prior to the Tenth Floor
Option Exercise Date; provided, however, that effective as of the Tenth Floor
Option Exercise Date, the liability of COSI thereunder shall be reduced by an
amount equal to the amount of the liability of Subtenant under the Sublease for
rent and additional rent which shall have been eliminated pursuant to the
provisions of the Eleventh Floor Option Agreement and this Tenth Floor Option
Agreement.

                                     X - 5
<PAGE>

         7. Refund of Security. Simultaneously with the receipt of the payment
to be made to it pursuant to paragraph "3" hereof, COSI shall take all steps as
may be required to permit all security remaining on deposit, or otherwise posted
by, Subtenant under the sublease to be released to Subtenant.

         8.       Brokerage   Commission.   Subtenant   shall  have  no
                  ----------------------
liability  for  any   brokerage   commission  in connection with this
transaction  other than as set forth in Paragraph 3(b) hereof.  Subtenant shall,
however,  pay any commission  which may be due any broker,  other than S.L.
Green Leasing,  Inc., with whom Subtenant may have dealt.  COSI shall have no
liability for any brokerage commission in connection with this transaction.

         9. Expiration of Eleventh Floor Option. In the event that the Landlord
fails to exercise the Eleventh Floor Option on or before the Eleventh Floor
Option Expiration date, this Tenth Floor Option Agreement shall immediately
cease to be of any further force or effect, and shall be deemed cancelled and
terminated, as of the Eleventh Floor Option Expiration Date.

         10. Expiration of Tenth Floor Option. In the event that the Landlord
shall exercise the Eleventh Floor Option, but shall fail to exercise the Tenth
Floor Option on or before the Tenth floor Option Expiration Date, this Agreement
shall immediately cease to be of any further force or effect, and shall be
deemed cancelled and terminated, as of the Tenth Floor Option Expiration Date.

         11.      Third  Party  Beneficiary.  S.L.  Green  Leasing,  Inc.  Shall
                  -------------------------
 be deemed a third party  beneficiary  of paragraphs "3" and "4" of this
Agreement.

         IN WITNESS WHEREOF, the parties have duly executed this Agreement as of
this 30th day of November, 1999.

                        G-H-G REALTY COMPPANY, LLC, Landlord

                                /s/ Bruce Gittlin
             By:      _______________________________________

                       RSL COM U.S.A., INC., Subtenant

                            /s/ Ruth Fisher
              By:     _______________________________________
                           Vice President

                        COMPUTER OUTSOURCING SERVICES, INC.

                         /s/ Nicolas J. Letizia
              By:     ________________________________________
                        Chief Financial Officer

                                     X - 6
<PAGE>

                              G-H-G REALTY COMPANY
                           21 PENN PLAZA o SUITE 1000
                              360 WEST 31ST STREET
                               NEW YORK, NY 10001
                                 (212) 244-4646

                                                            February 14, 2000

BY: HAND DELIVERY

Computer Outsourcing Services, Inc.
2 Christie Heights Street
Leonia, NJ 07605

RSL Com U.S.A., Inc.
430 Park Avenue
New York, NY 10022

Gentlemen:

In accordance with Paragraph 2. of the 10th Floor Option Agreement between us,
made as of the 30th day of November 1999 (the "Agreement"), this letter will
serve to formally notify you that we have elected to exercise the 10th Floor
Option set forth in Paragraph 1. of the Agreement.

Please note that in accordance with Paragraph 4. of the Agreement, RSL is
required to make the payments referred to in Paragraph 3. of the Agreement
within five (5) business days after receipt of this notice.

                                                              Very truly yours,

                                                 G-H-G REALTY COMPANY, L.L.C.
                                           By: G-H-G Realty Management Co., Inc.
                                                       Management Member

                                                      /s/ Bruce D. Gittlin
                                                       -------------------
                                                        Bruce D. Gittlin
                                                            President

                                     X - 7INFOCROSSING, INC. AND SUBSIDIARIES
                                  EXHIBIT 10.6B

                         ELEVENTH FLOOR OPTION AGREEMNT

         AGREEMENT made as of the 30th day of November, 1999, by and among G-H-G
REALTY COMPANY, L.L.C., a limited liability company formed in accordance with
the laws of the State of New York (successor to G-H-G Realty Company, a
partnership), having an office at 360 West 31st Street, New York, New York 10001
(hereinafter referred to as "Landlord"); RSL COM U.S.A., INC., a Delaware
corporation, having an office at 430 Park Avenue, New York, New York 10022
(hereinafter referred to as "Subtenant"); and COMPUTER OUTSOURCING SERVICES,
INC. (formerly known as Commercial Online Systems, Inc.), a Delaware corporation
having an office at 2 Christie Heights Street, Leonia, New Jersey 07605
(hereinafter referred to as "COSI").

                             W I T N E S S E T H:

         WHEREAS, the Landlord previously entered into an Agreement of Lease
dated January 24, 1991 with COSI with respect to certain space on the Tenth
(10th) and Eleventh (11th) Floors and certain basement space in the building
known as 360 West 31st Street, New York, New York (the "Building") (the said
Agreement of Lease together with five (5) separate supplemental agreements by
and between the parties thereto being collectively referred to herein as "the
Lease"); and

         WHEREAS, COSI thereafter entered into an Agreement of Sublease dated
July 1998 with the Subtenant (the "Sublease"), pursuant to which COSI sublet to
Subtenant the entire Eleventh (11th) Floor of the Building (the "Eleventh Floor
Premises") consisting of approximately 22,300 rentable square feet and part of
the Tenth (10th) Floor (the "Tenth Floor Premises") of the Building, consisting
of approximately 9,200 rentable square feet (the Eleventh Floor Premises and the
Tenth Floor Premises being collectively referred to herein as the "Demised
Premises"); and

         WHEREAS, Subtenant, as a condition of Landlord's consent to Sublease,
agreed to be subject and subordinate at all times to all covenants, agreements,
terms, provisions and conditions of the Lease and of a certain Consent to
Sublease dated September 14, 1998 (the "Consent"); and

         WHEREAS, the parties have entered into a certain agreement of even date
herewith (the "Tenth Floor Option Agreement") pursuant to which COSI and
Subtenant have granted to Landlord an option (the "Tenth Floor Option") to take
back the Tenth Floor Premises, which option shall expire on February 15, 2000
(the "Tenth Floor Option Expiration Date"); and

         WHEREAS, Landlord has requested an option to take back the Eleventh
Floor Premises, and COSI and Subtenant desire to grant such option to Landlord
on the terms and conditions set forth herein.

         NOW, THEREFORE, in consideration of the premises, the mutual
obligations of the parties hereto, and other good and valuable consideration,
receipt of which is acknowledged by each of them, the parties hereby covenant
and agree as follows:

         1. Grant of Option. Subtenant and COSI hereby grant Landlord the option
(the "Eleventh Floor Option"), expiring on December 3, 1999 (the "Eleventh Floor

                                     X - 8
<PAGE>
Option Expiration Date") to take back the Eleventh Floor Premises, effective as
of November 30, 1999 (the "Eleventh Floor Effective Date").

         2. Manner of Exercise. The Eleventh Floor Option may be exercised only
by delivery of written notice of such exercise to Subtenant and COSI prior to
the Eleventh Floor Option Expiration Date. Such notice shall be deemed given on
the date of actual receipt thereof by Subtenant and COSI (such date being
referred to herein as the "Eleventh Floor Option Exercise Date").

         3.       Consideration.  In the  event  that  the  Landlord  elects  to
                  -------------
  exercise  the  Eleventh  Floor  Option, Subtenant shall pay the total sum of
Two Hundred Fifty Thousand ($250,000.00) Dollars, ("Consideration") as follows:

                  a        To the Landlord, the sum of Eighty Thousand Dollars
                           ($80,000.00);

                  b        To S.L. Green Leasing, Inc., the sum of One Hundred
                           Twenty Five Thousand  Dollars ($125,500.00);

                  c        To COSI, the sum of Forty Five Thousand Dollars
                           ($45,000.00).

         4.       Payment.        The aforementioned payments shall be made
                  -------
within five (5) business days after receipt by Subtenant and COSI of notice of
exercise of the Eleventh Floor Option. If such payments are not timely made,
they shall accrue interest at the highest rate permitted by law. In the event
that Landlord, COSI, or S.L. Green Leasing, Inc. as the case may be, is required
to expand any sums, including but not limited to reasonable legal fees, to
collect any such payment, Subtenant shall, in addition to all other payments
required hereunder, be liable for all such costs and expenses.

6.       Amendment of Sublease; Mutual Release.
         -------------------------------------

A.       The Sublease shall automatically be deemed amended, effective as of the
Eleventh Floor Effective Date, to eliminate the Eleventh Floor Premises from the
Demised Premises, and Subtenant shall have no further liability to COSI or
Landlord as of the Eleventh Floor Effective Date, for any rent or other
obligation whatsoever pertaining to the Eleventh Floor Premises, whether arising
out of the Sublease, the Lease, the Consent or otherwise, all of which
liabilities are hereby released, except for rent or other obligations under the
Sublease accruing prior to the Eleventh Floor Effective Date and the
Consideration payment obligations set forth herein. All payments due from RSL
under the Sublease shall thereupon be reduced, so that each such payment shall
be in an amount equal to (x) the payment provided for under the terms of the
Sublease, multiplied by (y) Twenty Nine and 21/100 Per Cent (29.21%).

B.       Effective as of the Eleventh Floor Effective Date, Subtenant releases
COSI from all liability under the Sublease with respect to the Eleventh Floor
Premises.

         6. COSI Liability. After the Eleventh Floor Effective Date, COSI shall
continue to be liable for the rent and additional rent due under the Lease but
for no other obligations thereunder, the Landlord releasing COSI from all
claims, obligations, actions, suits and the like under the Lease except COSI's
liability for the rent and additional rent thereunder as limited herein and
except for obligations under the lease, if any, arising prior to the Eleventh
                                     X - 9
<PAGE>
Floor Effective Date; provided, however, that effective as of the Eleventh Floor
Effective Date, the liability of COSI thereunder shall be reduced by an amount
equal to the amount by which the liability of Subtenant under the Sublease for
rent and additional rent shall have been reduced pursuant to the provisions of
paragraph "5" hereof.

         7. Refund of Security. Simultaneously with the receipt of the payment
to be made to it pursuant to paragraph "3" hereof, COSI shall take such steps as
may be required to permit a portion of the security deposited (or otherwise
posted by) Subtenant under the sublease, equal to Seventy and 79/100 Per Cent
(70.79%) of the amount thereof, to be released to Subtenant (or the Letter of
Credit reduced accordingly).

         8. Landlord's Work. Landlord shall, on or before the Tenth Floor Option
Expiration Date, at its sold cost and expense, cause (i) the staircase
connecting the Tenth Floor Premises and Eleventh Floor Premises to be removed
and disposed of, with any structural damage resulting from such removal to be
repaired in a workmanlike manner; (ii) the ceiling of the Tenth Floor Premises
to be closed and finished in a manner consistent with the remainder of such
ceiling; and (iii) the floor area of the Tenth Floor Premises under the
staircase to be repaired and finished to match the surrounding floor area,
except that no carpet repair or replacement shall be done.

         9.       Brokerage   Commission.   Subtenant   shall  have  no
                  ----------------------
liability for any brokerage commission in connection with this transaction other
than as set forth in Paragraph 3(b) hereof.  Subtenant shall,  however,  pay any
commission  which may be due any broker,  other than S.L. Green Leasing,  Inc.,
with whom Subtenant may have dealt.  COSI shall have no liability for any
brokerage commission in connection with this transaction.

         10. Waiver of Claim. Subtenant agrees that, provided that Landlord
exercises the Eleventh Floor Option, Subtenant shall not assert any claim
against Landlord or COSI based upon or relating to efforts heretofore made by
Subtenant to further sublet the Demised Premises or any part thereof.

         11. Expiration of Eleventh Floor Option. In the event that the Landlord
fails to exercise the Eleventh Floor Option on or before the Eleventh Floor
Option Expiration date, this Agreement shall immediately cease to be of any
further force or effect, and shall be deemed cancelled and terminated, as of the
Eleventh Floor Option Expiration Date.

         12.      Third  Party  Beneficiary.  S.L.  Green  Leasing,  Inc.
                  -------------------------
Shall be deemed a third party  beneficiary  of paragraphs "3" and "4" of this
Agreement.

         IN WITNESS WHEREOF, the parties have duly executed this Agreement as of
this 30th day of November, 1999.

                         G-H-G REALTY COMPPANY, LLC, Landlord

                                /s/ Bruce Gittlin
                         By:   _____________________________________

                         RSL COM U.S.A., INC., Subtenant

                                 /s/ Ruth Fisher
                         By:   _____________________________________
                                 Vice President

                         COMPUTER OUTSOURCING SERVICES, INC.

                                  /s/ Nicolas J. Letizia
                         By:   _____________________________________
                                  Chief Financial Officer

                                     X - 10
<PAGE>

                            GHG REALTY COMPANY, LLC.
                              360 West 31st Street
                            New York, New York 10001

December 2, 1999

Computer Outsourcing Services, Inc.                   RSL COM U.S.A. Inc.
2 Christie Heights Street                             430 Park Avenue
Leonia, New Jersey   07605                            New York, New York  10022
Attention: Zach Lonstein                              Attention: Ruth Fisher

         In accordance with Paragraph 2 of the Eleventh Floor Option Agreement
and Between us made as of the 30th Day of November, 1999, ("The" Agreement).
This letter will serve to formally notify you that we have elected to exercise
the Eleventh Floor Option set forth in Paragraph 1 of the Agreement.

                            GHG Realty Company, LLC.

                            /s/ Bruce D. Gittlin
                            -----------------------
                            Bruce D. Gittlin
                            President

BDG:ag
Cc: Richard Bier, ESQ.
       Howard Tenenbaum

                                     X - 11

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