Document:

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                                                                   Exhibit 10.17

                               SUBLEASE AGREEMENT
                               ------------------

     THIS SUBLEASE AGREEMENT (sometimes hereinafter referred to as the
"Sublease") is made and entered into as of the     day of May, 2001, by and
 --------                                      ---
between CELLIT, INC., a Florida corporation (hereinafter called "Sublandlord"),
                                                                 -----------
whose address for purposes hereof is Westside Plaza II, 8300 N.W. 33(rd) Street,
Suite 200, Miami, Florida 33166 and VELOCITEL, INC., a Delaware corporation
whose address for purposes hereof is 8300 N.W. 33(rd) Street, Suite 300, Miami,
Florida 33166 (hereinafter called "Subtenant").
                                   ---------

                                   WITNESSETH
                                   ----------

     WHEREAS, by Lease Agreement entered into February 23, 1999 between
Sublandlord and Codina West Dade Development Corp., No. 4, a Florida corporation
("Prior Landlord"), as assigned by Prior Landlord to the Prudential Insurance
  --------------
Company of America (the "Master Landlord"), and as amended by (a) First
                         ---------------
Amendment to Lease Agreement dated as of March 30, 2000 between Master Landlord
and Sublandlord, (b) Second Amendment to Lease Agreement retroactively effective
as of March 30, 2000 between Master Landlord and Sublandlord and (c) Third
Amendment to Lease Agreement dated as of May 26, 2000 between Master Landlord
and Sublandlord (collectively, the "Master Lease"), Sublandlord leases from
                                    ------------
Master Landlord approximately 43,716 square feet of rentable area on the 2(nd)
and 3(rd) floors (the "Master Lease Premises") in the building known as Westside
                       ---------------------
Plaza II, located at 8300 N.W. 33(rd) Street, Suite 2000, Miami, Florida 33166
(the "Building"); and
      --------

     WHEREAS, Subtenant desires to sublease a portion of the Master Lease
Premises from Sublandlord.

     NOW, THEREFORE, for and in consideration of the foregoing and for other
good and valuable consideration and of the mutual agreements hereinafter set
forth, Sublandlord and Subtenant stipulate, covenant and agree as follows:

     1. Capitalized Terms. Except as otherwise defined herein, all capitalized
        -----------------
terms shall have the same meaning as ascribed to such terms in the Master Lease.
A true and correct copy of the Master Lease is attached hereto as Exhibit "A"
                                                                  ----------
and made a part hereof by this reference.

     2. Sublease Premises. Subject to and upon the terms and conditions
        -----------------
hereinafter set forth, Sublandlord does hereby sublease to Subtenant a portion
of the Master Lease Premises consisting of 8,200 square feet of rentable area
(the "Sublease Premises") Suite 300, located on the third floor of the Building
      -----------------
and as depicted in red on Exhibit "B" attached hereto and made a part hereof by
                          ----------
this reference. Subtenant acknowledges and agrees that it has inspected and
measured the Sublease Premises and agrees that for all purposes under this
Sublease that the Sublease Premises contains 8,200 rentable square feet.
Sublandlord makes no representations or warranties as to the size of the
Sublease Premises.

     3. Term. The term of this Sublease (the "Term") shall commence (the
        ----                                  ----
"Commencement Date") on the date hereof and shall end on the earlier of (a)
 -----------------
December 30,

<PAGE>

2004 or (b) the date on which the Master Lease expires or terminates, unless
sooner terminated or extended as provided herein.

     4. Rent.
        ----

          a. Subtenant agrees to pay to Sublandlord base rent for each year of
the Term as follows (herein called the "Base Rent"):
                                        ---------

Year of Term    Annual Base Rent   Monthly Base Rent   Per Rentable Square Foot
-------------   ----------------   -----------------   ------------------------
1 to 6 month          68,250             11,375                  21.00
7 to 12 month         86,100             14,350                  21.00
      2              176,300             14,692                  21.50
      3              180,400             15,033                  22.00
      4              184,500             15,375                  22.50

Provided Subtenant does not commit a default under this Sublease, Base Rent for
the first six (6) months of the Term shall be calculated based only on 6,500
rentable square feet, so that the monthly Base Rent for each of the first six
(6) months of the Term shall be $11,375 plus applicable sales tax. Further, to
accommodate Subtenant's move-in and phone and data hookup, Sublandlord agrees
that Base Rent for the first 45 days of the Term shall be abated and shall not
be due and payable. Base Rent is payable in advance in equal monthly
installments, without any offset or deduction whatsoever, in lawful money (legal
tender for public or private debts) of the United States of America, at
Sublandlord's address as stated above, or elsewhere as designated from time to
time by Sublandlord's written notice to Subtenant, on the first day of each
month beginning with the calendar month in which the Commencement Date occurs.
If the Commencement Date occurs on any day of the month except the first day,
Subtenant shall pay the monthly installment of Base Rent as provided for in this
Section 4.a for such commencement month on a pro rata basis (such proration to
be based on the actual number of days in the commencement month). Base Rent for
any partial month of occupancy at the end of the term will be prorated, such
proration to be based on the actual number of days in the partial month. Upon
due date, Subtenant shall deliver to Sublandlord the first month's rent,
including sales tax, in the total amount of $12,114.38 which Sublandlord shall
apply to the first month Base Rent is due hereunder.

          b. In addition to the Base Rent, Subtenant shall pay to Sublandlord
additional rent (herein called "Additional Rent") (the Base Rent and Additional
                                ---------------
Rent, together with all other charges and other sums due from Subtenant to
Sublandlord hereunder, are herein collectively referred to as the "Rent"),
                                                                   ----
consisting of the following:

               i) an amount equal to a proportionate share of the increases in
Operating Expenses over those for the base year of 2001. Operating Expenses
shall be calculated in accordance with the terms of the Master Lease and shall
be due and payable to Sublandlord on those dates due and payable by Sublandlord
to Master Landlord under the terms of the Master Lease. Sublandlord shall
provide Subtenant with copies of all notices and calculations it actually
receives from Master Landlord with respect to Operating Expenses. Subtenant's
proportionate share of increases in Operating Expenses shall be determined by
dividing the rentable square

                                        2

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footage of the Sublease Premises (8,200) by the rentable square footage of the
Building as determined by Master Landlord from time to time. Subtenant's
obligation to pay its proportionate share of Operating Expenses and Real Estate
Taxes shall survive any expiration or termination of this Sublease;

               ii) all such other sums of money which shall become due from and
payable by Subtenant under this Sublease. Any such amount (including any
expenditure made by Sublandlord for which Subtenant is liable under this
Sublease) shall be due and payable by Subtenant with the succeeding installment
of Base Rent (unless some other date is expressly provided herein for payment of
such amount).

          c. If Sublandlord shall at any time or times accept Rent after it
shall become due and payable, such acceptance shall not constitute a waiver of
any of Sublandlord's rights hereunder or excuse such delay or delays on
subsequent occasions.

          d. Subtenant shall pay to Sublandlord each month a sum equal to any
sales tax, tax on rents, and any other charges, taxes and/or impositions now in
existence or subsequently imposed based upon the privilege of renting the space
leased under this Sublease or upon the amount of Rent collected whether such
taxes, charges or impositions are assessed on Rent or any other sums due or
payable pursuant to this Sublease. Subtenant's liability for such taxes and/or
impositions shall be payable whether assessed at the time Rent is paid or
retroactively and shall survive any expiration or termination of this Sublease.
Nothing herein shall, however, be taken to require Subtenant to pay any part of
any federal or state tax on income imposed upon Sublandlord.

     5. Condition of Sublease Premises. Subtenant acknowledges and agrees that
        ------------------------------
Subtenant accepts the Sublease Premises in "AS IS" condition. Subtenant hereby
waives any and all rights it may have against the Sublandlord as a result of any
defect within the Sublease Premises.

     6. Furnishings. Sublandlord shall provide Subtenant during the term of this
        -----------
Sublease with those items of furnishings described on Exhibit "C" attached
                                                      ----------
hereto and by this reference made a part hereof (collectively referred to herein
as the "Furnishings"). Subtenant acknowledges and agrees that Subtenant accepts
        -----------
the Furnishings in "AS IS" condition. Subtenant shall maintain the Furnishings
in their current condition, normal wear and tear excepted. The Furnishings shall
remain the property of Sublandlord and shall at all times during and after the
term of this Sublease remain on the Sublease Premises.

     7. Security Deposit. Concurrently with the execution of this Sublease by
        ----------------
Subtenant, Subtenant has deposited with Sublandlord the sum of $34,125.00, the
receipt of which is hereby acknowledged by Sublandlord. Within ten (10) business
days of the commencement of the seventh month of the Term, Subtenant shall
deposit with Sublandlord an additional $8,925.00, thereby providing a total
security deposit of $43,050.00. Failure of Subtenant to timely deliver such
additional sum of $8,925.00 shall, without notice or grace, be an immediate
default hereunder. Such initial sum of $34,125.00 and the additional sum of
$8,925.00 are collectively referred to as the "Security Deposit." This sum shall
                                               ----------------
be retained by Sublandlord as security for the payment by Subtenant of the Rents
and all other payments agreed in this Sublease to be paid by Subtenant and for
the faithful performance by Subtenant of the terms, provisions, covenants and
conditions of this Sublease. Sublandlord at Sublandlord's

                                        3

<PAGE>

option may at the time of any default by Subtenant apply said sum or any part of
it towards the payment of the Rent and towards the performance of each and
every one of Subtenant's covenants under this Sublease, and for any sum which
Sublandlord may spend or be required to spend because of Subtenant's default,
including any damages or deficiency in reletting, but such covenant and
Subtenant's liability under this Sublease shall thereby be discharged only pro
tanto; Subtenant shall remain liable for any amounts that such sum shall be
insufficient to pay. Sublandlord may exhaust any or all rights and remedies
against Subtenant before resorting to said sum, but nothing in this Sublease
shall require or be deemed to require Sublandlord to do so. If Sublandlord
applies all or part of the Security Deposit as provided in this paragraph,
Subtenant shall, promptly upon demand of Sublandlord, deposit with Sublandlord
the amount so applied so that Sublandlord shall have the full Security Deposit
on hand at all times during the term. In the event this Security Deposit shall
not be utilized for any such purpose, then, provided Subtenant has fully
performed under this Sublease and has vacated the Sublease Premises and
surrendered all keys to the Sublease Premises, but not if Sublandlord has
terminated this Sublease due to Subtenant's default under any provision of this
Sublease, it shall be returned by Sublandlord to Subtenant within thirty (30)
days after the expiration of the term or the determination and payment of all
amounts due under this Sublease, if any, whichever occurs later. Sublandlord
will not be required to pay Subtenant any interest on the Security Deposit and
Sublandlord may commingle the Security Deposit with its own funds.

     8. Assignment by Subtenant. The Subtenant may not assign, transfer or
        -----------------------
pledge this Sublease or sublet the Sublease Premises unless the prior written
consent of the Sublandlord is first obtained, which consent may be withheld in
Sublandlord's sole and absolute discretion.

     9. Parking. Subtenant acknowledges and agrees that no parking is available
        -------
for the Sublease Premises and that Sublandlord shall have no obligation to
provide any parking to Subtenant of any nature whatsoever. Notwithstanding the
foregoing, Sublandlord agrees to make available to Subtenant up to five (5)
parking spaces per 1,000 rentable square feet of the Sublease Premises, not to
exceed an aggregate of forty (40) parking spaces, to the extent Sublandlord is
provided at least five (5) parking spaces per 1,000 rentable square feet for the
Master Lease Premises. Any parking spaces provided to Subtenant shall be
unreserved, and Subtenant's use of such parking spaces is subject to the rights
of Master Landlord as provided in Section 34 of the Master Lease.

     10. Master Lease.
         ------------

          a. The parties agree that this Sublease is conditioned upon the
approval of the Master Landlord. The Subtenant agrees that it shall comply,
without delay, with all requirements of the Master Landlord with respect to its
consent to this Sublease. This Sublease is subject and subordinate to all of the
terms of the Master Lease with the same force and effect as if fully set forth
herein at length, excepting only as otherwise specifically provided herein. All
of the terms with which Sublandlord is bound to comply under the Master Lease
shall, to the extent only that they apply to the Sublease Premises and except as
otherwise provided herein, be binding upon Subtenant, and all of the obligations
of the Master Landlord set forth in the Master Lease shall, to the extent that
they apply to the Sublease Premises and except as otherwise provided herein,
inure to Subtenant's benefit. It is the intention of the parties that, except as
otherwise provided in this Sublease, the relationship between Sublandlord and
Subtenant shall be governed by the language of the various articles of the
Master Lease as if they were set forth in this Sublease in full, and the words
"Landlord," "Tenant," "Lease" and "Premises" as used in the

                                        4

<PAGE>

Master Lease, shall read respectively, "Sublandlord," "Subtenant," "Sublease"
and "Sublease Premises."

          b. For the purposes of this Sublease, the following provisions of the
Master Lease are hereby deleted or modified as follows:

               (i) the Basic Lease Provisions are deleted;

               (ii) Articles 1, 2, 3 and 4 are deleted;

               (iii) Article 10 is deleted;

               (iv) the clause "Except as described in Section 10 above," on the
first line of Article 11 is deleted. The clause "provided, however, that in the
event Landlord or an affiliate of Landlord is retained to complete the Tenant
Improvements, then Landlord shall be liable for any damage or injury to all or
any part of the Building caused by Landlord or its affiliate during installation
of the Tenant Improvements" in Article 11 is deleted;

               (v) Articles 12, 13 and 15 are deleted;

               (vi) the last sentence of Article 15 is deleted;

               (vii) Articles 16, 19, 20, 22(e), 25, 28, 29, 34, 35, 44, 45, 53,
54, and 57-60 are deleted;

               (viii) All exhibits are deleted;

               (ix) the First Amendment is deleted;

               (x) the Second Amendment is deleted; and

               (xi) the Third Amendment is deleted.

          c. Subtenant covenants and agrees that Subtenant shall not do or
suffer or permit anything to be done which would constitute a default under the
Master Lease or would cause the Master Lease to be canceled, terminated or
forfeited by virtue of any rights of cancellation, termination, or forfeiture
reserved or vested in the Master Landlord under the Master Lease, and that
Subtenant will indemnify and hold harmless Sublandlord from and defend
Sublandlord against all claims, liabilities, losses and damage of any kind
whatsoever that Sublandlord may incur by reason of, resulting from or arising
out of any such default, cancellation, termination or forfeiture.

     11. Master Landlord's Responsibilities. Subtenant recognizes that
         ----------------------------------
Sublandlord is not in a position to furnish the services set forth in the Master
Lease or to perform certain other obligations which are not within the control
of Sublandlord, such as, without limitation, maintenance, repairs and
replacements to the Building and Sublease Premises, compliance with laws, and
restoration of the Sublease Premises and/or Building after casualty or
condemnation. Therefore, notwithstanding anything to the contrary contained in
this Sublease, Subtenant agrees that Subtenant shall look solely to the Master
Landlord to furnish all services and to perform all obligations agreed upon to
be furnished and performed by the Master Landlord under the Master

                                        5

<PAGE>

Lease. Sublandlord shall not be liable to Subtenant or be deemed in default
hereunder for failure of the Master Landlord to furnish or perform the same.
Without limiting the generality of the foregoing, Subtenant shall not be
entitled by reason of the interruption, stoppage or suspension of any of the
Building systems or services for any reason whatsoever to claim any actual or
constructive eviction either in whole or in part nor to any other diminution or
abatement of Rent (except and only to the extent Sublandlord actually receives
an abatement of Rent with respect to the Sublease Premises pursuant to Article
28 of the Master Lease) or other compensation nor shall this Sublease or any of
the obligations of the Subtenant be affected or reduced.

     12. Condemnation; Damage by Fire or Other Casualty.
         ----------------------------------------------

          a. In the event of any taking by eminent domain or damage by fire or
other casualty to the Sublease Premises, thereby rendering the Sublease Premises
wholly or partially untenantable, Subtenant shall acquiesce in and be bound by
any action taken pursuant to the terms of the Master Lease or other agreement
entered into between Sublandlord and the Master Landlord with respect thereto;
and if, by application of the provisions of the Master Lease or separate
agreement between the Master Landlord and Sublandlord, the Master Lease is
terminated, this Sublease shall likewise terminate. If, however, the Master
Lease remains in effect, this Sublease shall remain in effect except that the
Base Rent and Additional Rent shall be abated proportionately during the period
of time that the Sublease Premises are wholly or partially untenantable,
provided however, that such abatement shall in no event exceed the abatement
granted to Sublandlord under the Master Lease for the Sublease Premises and
provided further, that no compensation or claim or reduction will be allowed or
paid by Sublandlord by reason of inconvenience, annoyance or injury to
Subtenant's business arising from the necessity of effecting repairs to the
Sublease Premises or any portion of the Building, regardless of whether or not
such repairs are required by operation of any provision of the Master Lease.

          b. Without limiting the generality of Section 11 of this Sublease,
Subtenant acknowledges that Sublandlord shall have no obligation to repair or
restore the Sublease Premises in case of damage by fire or other casualty or to
restore any uncondemned portion in the case of a taking by or as a result of the
exercise of the power of eminent domain, and any repair or restoration of the
Sublease Premises shall only be as provided by the Master Landlord pursuant to
the Master Lease.

     13. Signage. Subtenant shall, at Subtenant's sole cost and expense and to
         -------
the extent made available by Master Landlord, arrange with Master Landlord for
Building standard suite signage and Building standard lobby directory signage,
the location and design of which shall be subject to Master Landlord's prior
written consent and Sublandlord's prior written consent which shall not be
unreasonably withheld. Subtenant shall be entitled to no other signage rights.

     14. Alterations. Subtenant shall not make or allow to be made any
         -----------
alterations, physical additions or improvements in or to the Sublease Premises
without first obtaining in writing Sublandlord's written consent for each such
alteration or addition, which consent may be granted or withheld in the sole
discretion of Sublandlord.

     15. Right of Entry. Sublandlord shall have the right to enter onto the
         --------------
Sublease Premises for purposes of inspection and, at Sublandlord's sole option,
correct any defect and/or

                                        6

<PAGE>

perform any repair obligation that is the obligation of Subtenant. Any repair by
Sublandlord shall not cure any default of Subtenant.

     16. Notices. All notices, offers, acceptances, rejections, consents,
         -------
requests and other communications hereunder shall be in writing and shall be
deemed to have been given (a) when delivered in person, or (b) when sent by
telecopier, telex or other telegraphic means (with receipt confirmed), or (c) on
receipt after being sent by express mail or delivery service guaranteeing
overnight delivery, provided that in each of (a), (b) and (c) a copy is mailed
by first class registered or certified mail, postage prepaid, return receipt
requested, in each case addressed to the parties at the addresses set forth in
the first paragraph of this Sublease, or to such other person or address as any
such party shall furnish by notice to the other parties in writing. Notices need
not be given or made by an officer of either party but shall be deemed
sufficiently given if made by the counsel of such party, and all of such notices
shall be deemed in compliance hereof provided only that they be given in the
manner specified herein.

     17. Brokers. The parties each represent and warrant to the other that the
         -------
only real estate brokers, salesmen or finders involved in this transaction are
Cushman & Wakefield of Florida, Inc. and Courvoisier Realty, to whom Sublandlord
shall pay a brokerage commission pursuant to a separate agreement. If a claim
for brokerage in connection with the transaction is made by any other broker,
salesman or finder claiming to have dealt through or on behalf of one of the
parties hereto (the "Indemnitor"), said Indemnitor shall indemnify, defend and
                     ----------
hold the other party hereunder, and such other parties' officers, directors,
agents and representatives (collectively, the "Indemnitees") harmless from all
                                               -----------
liabilities, damages, claims, costs, fees and expenses whatsoever (including
reasonable attorney's fees and court costs through the trial and appellate
level) with respect to said claim for brokerage. The provisions of this Section
shall survive any cancellation or termination of this Sublease.

     18. Radon Gas. Radon is a naturally occurring radioactive gas that, when it
         ---------
has accumulated in a building in sufficient quantities, may present health risks
to persons who are exposed to it over time. Levels of radon that exceed federal
and state guidelines have been found in buildings in Florida. Additional
information regarding radon and radon testing may be obtained from your county
public health unit.

     19. Sublandlord's Right to Perform for Subtenant's Account. If Subtenant
         ------------------------------------------------------
fails to observe or perform any term or condition of this Sublease as and when
required hereunder after giving effect to any applicable grace periods, if any,
applicable thereto, then Sublandlord may immediately or at any time thereafter
perform the same for the account of Subtenant. If Sublandlord makes any
expenditure or incurs any obligation for the payment of money in connection with
such performance for Subtenant's account (including reasonable attorneys' fees
and costs in instituting, prosecuting and/or defending any action or proceeding
through appeal), the reasonable sums paid or obligations incurred, with interest
thereon at the highest lawful rate, shall be paid by Subtenant to Sublandlord
within five (5) days after rendition of a bill or statement to Subtenant.

     20. Severability. If any term, provisions, covenant, or condition of
         ------------
this Sublease, or the application thereof to any person of circumstance, shall,
to any extent be invalid or unenforceable, the remainder of this Sublease, or
the application of such term, provision, covenant or condition to persons or
circumstances other than those as to which it is held invalid or unenforceable,
shall not be affected thereby and each term, provision, covenant or condition

                                        7

<PAGE>

of this Sublease shall be valid and be enforceable to the fullest extent
permitted by law. This Sublease shall be construed in accordance with the laws
of the State of Florida without regard to principles of conflicts of law.

     21. Time. It is understood and agreed between the parties hereto that time
         ----
is of the essence of all the terms, provisions, covenants, and conditions of
this Sublease.

     22. Definitions and Paragraph Headings. The terms Sublandlord, Master
         ----------------------------------
Landlord and Subtenant as herein contained shall include singular and/or plural,
masculine, feminine, and/or neuter, heirs, successors, executors,
administrators, personal, representatives and/or assigns wherever the context so
requires or admits. The terms, provisions, covenants, and conditions of this
Sublease are expressed in the total language of this Sublease and the paragraph
headings are solely for the convenience of the reader and are not intended to be
all inclusive.

     23. Entire Agreement. This Sublease contains the entire agreement between
         ----------------
the parties hereto and all previous negotiations leading thereto, and it may be
modified only by an agreement in writing signed by Sublandlord and Subtenant. No
surrender of the Sublease Premises, or of the remainder of the terms of this
Sublease shall be valid unless accepted by Sublandlord in writing. Subtenant
acknowledges and agrees that Subtenant has not relied upon any statement,
representation, prior written, or prior or contemporaneous oral promises,
agreements or warranties, except such as are expressed herein.

     24. No Recording. Subtenant shall not record this Sublease nor a memorandum
         ------------
of this Sublease in any public records, including without limitation, the Public
Records of Miami-Dade County, Florida.

     25. Counterparts. This Sublease may be executed in one or more
         ------------
counterparts, each of which shall be deemed an original, but all of which taken
together shall constitute one instrument.

     26. Master Landlord's Approval. This Sublease is conditioned upon the
         --------------------------
consent hereto by Master Landlord. Subtenant shall be responsible for payment of
any and all reasonable fees and/or costs of Master Landlord which Sublandlord
may be obligated to pay under the terms of the Master Lease. In the event Master
Landlord fails to consent to this Sublease on or prior to the date that is ten
(10) days after the date of this Sublease, then Sublandlord shall return the
Security Deposit plus first month's Base Rent to Subtenant, and thereafter this
Sublease shall be null and void.

                                        8

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have signed, sealed and delivered
this Sublease on the day and year first above written.

WITNESSES:                               SUBLANDLORD:

/s/ illegible                            CELLIT, INC., a Florida corporation
-----------------------------

                                         By: /s/ illegible
-----------------------------                ---------------------------------
                                         Title: CFO

                                                  [CORPORATE SEAL]

                                         SUBTENANT:

                                         VELOCITEL, INC., a Delaware corporation
-----------------------------

/s/ illegible                            By: /s/ illegible
-----------------------------                ---------------------------------
                                         Title: illegible

                                                  [CORPORATE SEAL]

                                        9

<PAGE>

                                   EXHIBIT "A"
                                   -----------

                                  Master Lease
                                  ------------

                                       A-1

<PAGE>

                                   EXHIBIT "B"
                                   -----------

                         Depiction of Sublease Premises
                         ------------------------------

                                       B-1

<PAGE>

                                    [GRAPHIC]

<PAGE>

                                   EXHIBIT "C"
                                   -----------

                                   Furnishings
                                   -----------

                                       C-1

<PAGE>

                            FURNITURE LIST - SUBLEASE
                            -------------------------

14 Sets of Office Furniture. Each Set includes the following:

     1 Bow Front Desk with 2 Drawers

     1 Bride

     1 Rectangular Surface

     2 Drawer Lateral File

     1 Book Case

1 Conference Table

20 Cubicle Spaces. Each Cubicle includes the following:

     1 Three-Drawer Unit

     1 Two-Drawer Unit

     1 Two-Overhead Bin Unit

2 Cubicle Work Spaces. Each containing the following:

     2 Work Tables

<PAGE>

                               CONSENT TO SUBLEASE
                               -------------------

     This Consent to Sublease (this "Agreement") is executed as of March 14th,
                                     ---------
2001 between THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, a New Jersey
corporation ("Landlord"), CELLIT, INC., a Florida corporation ("Tenant"), and
              --------                                          ------
VELOClTEL, INC., a Delaware corporation ("Subtenant").
                                          ---------

                                    RECITALS:

     A. Tenant and Landlord entered into the Lease Agreement dated as of
February 23, 1999, as amended by that certain First Amendment to Lease Agreement
dated as of March 30, 2000, as amended by that certain Second Amendment to Lease
Agreement dated as of May 26, 2000, and as amended by that certain Third
Amendment to Lease Agreement dated as of May 26, 2000 (as so amended, the
"Lease"), under which Landlord is leasing to Tenant therein described space
 -----
comprising 43,716 square feet office building commonly known as Westside Plaza
II, located at 8300 N.W. 33(rd) Street, Miami, Florida 33122. Capitalized terms
used herein but not defined shall be given the meanings assigned to them in the
Lease.

     B. Tenant desires to sublet approximately 8,200 square feet as more
particularly described in Exhibit A hereto (the "Subleased Premises") to
                          ---------              ------------------
Subtenant, and Subtenant desires to assume all of Tenant's obligations under the
Lease, subject to the terms and conditions contained herein.

                                   AGREEMENTS:

     For valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

     1. Consent. Subject to the terms and conditions contained in this
        -------
Agreement, Landlord hereby consents to the subletting by Tenant of the Subleased
Premises to Subtenant pursuant to the Sublease Agreement between Tenant and
Subtenant, the exact form of which is attached hereto as Exhibit B (the
                                                         ---------
"Sublease"). Landlord's consent contained herein shall not waive its rights as
 --------
to any subsequent assignment, sublease or other transfer. This Consent is a
consent only to the subletting itself and the occupancy of the Subleased
Premises by the Subtenant and shall not be deemed a consent to any other
provisions contained in the Sublease.

     2. Assumption of Liabilities. Tenant and Subtenant shall be jointly and
        -------------------------
severally liable to Landlord for all of the obligations of the "Tenant" under
                                                                ------
the Lease, including, without limitation, Tenant's indemnification obligations,
and Landlord may enforce the same directly against Subtenant; however, Subtenant
shall be liable to Landlord only for the amount of rent (including any
pass-through expenses) agreed to be paid by Subtenant under the terms of the
Sublease.

     3. No Obligations Created. Each of the parties to this Agreement agree and
        ----------------------
acknowledge that Landlord shall have no obligation or liability under the terms
of the Sublease. Without limiting the generality of the foregoing, Landlord
shall have no liability (and shall not be bound by) any modifications, deletions
or waivers of any provision of the Lease as embodied in the Sublease or any
other agreement between Tenant and Subtenant. Additionally, Landlord shall have
no obligation to give notice of any default under the Lease except to Tenant
(and only to the extent required under the Lease) and shall have no obligation
to deal with any party other than Tenant with respect to the Lease or the
Subleased Premises. Nothing in this Agreement or otherwise shall create privity
of estate between Landlord and Subtenant, and Subtenant irrevocably waives any
claims based on, or alleged to have arisen from, such an estate. Subtenant
hereby releases, acquits and forever discharges Landlord and its agents,
employees, officers, directors, partners and affiliates from any and all claims,
liabilities and obligations arising out of or in any way related to the Sublease
which Subtenant or any party claiming by, through or under Subtenant now has or
may ever have in the future against Landlord or any of such other parties.
Subtenant acknowledges that Landlord would not have entered this Agreement
without such release.

     4. Indemnification. To the fullest extent allowed by law, Subtenant shall
        ---------------
indemnify, defend and hold harmless Landlord from and against any and all loss,
liability, attorneys' fees, expenses and claims arising out

                                        1

<PAGE>

of any injury to person or damage to property on or about the Subleased Premises
caused by any act or omission of Subtenant, its agents, servants, contractors,
employees or invitees.

     5. Condition of Subleased Premises. Landlord makes no representations or
        -------------------------------
warranties, express or implied, concerning the condition of the Subleased
Premises and Subtenant accepts the Subleased Premises in their "as-is" condition
as of the date hereof.

     6. Subordination. The Sublease shall in all respects be subject and
        -------------
subordinate to the Lease and to all modifications, amendments and extensions
thereof, and any term, condition or provision contained in the Sublease in
conflict with the Lease shall be null and void as to Landlord (although
effective between Tenant and Subtenant) notwithstanding Landlord's consent to
the subletting. Subject to Landlord's rights in Paragraph 13 below, any
termination of the Lease shall result in a termination of the Sublease.

     7. Brokerage. Neither Tenant nor Subtenant has dealt with any broker or
        ---------
agent in connection with the negotiation or execution of this lease, other
than Cushman & Wakefield of Florida, Inc. Courvoisier Realty, whose commission
shall be paid by Tenant pursuant to a separate written agreement. In no event
shall Landlord be liable for any leasing or brokerage commission with respect to
the negotiation and execution of the Sublease or this Agreement. Tenant and
Subtenant shall each jointly and severally indemnify, defend and hold Landlord
harmless from and against all costs, expenses, attorneys' fees and other
liability for commissions or other compensation claimed by any broker or agent
claiming the same by, through or under the indemnifying party with respect to
the Sublease or this Agreement.

     8. Notices. All notices and other communications given pursuant to the
        -------
Lease and this Agreement shall be in writing and shall be (a) mailed by first
class, United States mail, postage prepaid, certified, with return receipt
requested, and addressed to the parties hereto at the address listed below, (b)
hand delivered to the intended addressee, or (c) sent by prepaid telegram,
cable, facsimile transmission, or telex followed by a confirmatory letter.
Notice sent by certified mail, postage prepaid, shall be effective three
business days after being deposited in the United States mail; all other notices
shall be effective upon delivery to the address of the addressee. The parties
hereto may change their addresses by giving notice thereof to the other in
conformity with this provision. Without limiting the provisions of Section 3
hereof, the addressees for notice set forth below shall supersede and replace
any addresses for notice set forth in the Lease.

Landlord's Notice Address:          The Prudential Insurance Company of America
                                    Two Ravinia Drive, Suite 1400
                                    Atlanta, Georgia 30346-2116
                                    Attention: PRlSA Asset Manager

With a copy to:                     Codina Real Estate Management, Inc.
                                    8323 N.W. 12(th) Street, Suite 115
                                    Miami, Florida 33126

Tenant's Notice Address:            Cellit, Inc.
                                    8300 N.W.33(rd) Street, Suite 200
                                    Miami,Florida 33166

Subtenant's Notice Address:         Velocitel, Inc.
                                    8300 N. W. 33rd Street, Suite 300
                                    Miami, Florida 33166

     9. Ratification. Tenant and Subtenant hereby ratify and confirm their
        ------------
respective obligations under the Lease, and represent and warrant to Landlord
that, as of the date hereof, they have no defenses thereto Additionally,
Tenant, and Subtenant further confirm and ratify that, as of the date hereof,
(a) the Lease is and remains in good standing and in full force and effect, and
(b) neither of such parties has any claims, counterclaims, set-offs or defenses
against Landlord arising out of the Lease or in any way relating thereto or
arising out of any other transaction between Landlord, Tenant or Subtenant.

                                        2

<PAGE>

     10. Binding Effect; Governing Law. Except as modified hereby, the Lease
         -----------------------------
shall remain in full effect and this Agreement shall be binding upon Landlord,
Tenant, and Subtenant and their respective successors and assigns. If any
inconsistency exists or arises between the terms of this Agreement and the terms
of the Lease, the terms of this Agreement shall prevail. This Agreement shall be
governed by the laws of the state in which the Subleased Premises are located.

     11. Amendment; Entire Agreement. This Agreement shall not be amended or
         ---------------------------
modified except by an instrument in writing signed by all the parties hereto and
this Agreement contains all of the agreements, understandings, representations
and warranties of the parties with respect to the subject matter hereof.

     12. Counterparts. This Agreement may be executed in multiple counterparts,
         ------------
each of which shall constitute an original, but all of which shall constitute
one document.

     13. Direct Lease. If Landlord shall recover or come into possession of the
         ------------
Subleased Premises before the stated expiration date of the Lease, Landlord
shall have the right, but not the obligation, to take over the Sublease and to
succeed to all rights of Tenant thereunder, Tenant hereby assigning (effective
as of the date of Landlord's succession to Tenant's estate in the Subleased
Premises) the Sublease if Landlord shall elect to take over. The subletting
thereunder is subject to the condition that, from and after the termination of
the Lease or re-entry by Landlord thereunder or other succession by Landlord to
Tenant's estate in the Subleased Premises, Subtenant hereby waives any right to
surrender possession or to terminate the Sublease and, at Landlord's election,
shall be bound to Landlord for the balance of the term thereof and shall attorn
to and recognize Landlord as its landlord, under all of the then executory terms
of the Sublease, except that Landlord shall not be (a) liable for any previous
act, omission or negligence of Tenant under the Sublease, (b) subject to any
counterclaim, defense or offset theretofore accruing to Subtenant against
Tenant, (c) bound by any previous modification or amendment of the Sublease made
without Landlord's consent or by any previous prepayment of more than one
month's rent and additional rent unless paid as provided in the Sublease, or (d)
obligated to perform any repairs or other work in the Subleased Premises or the
Building beyond Landlord's obligations under the Lease, and Subtenant shall
execute and deliver such instruments as Landlord may reasonably request to
evidence and confirm such attornment.

                                        3

<PAGE>

     EXECUTED as of the date first written above.

WITNESSES:                                LANDLORD:

/s/ illegible                             THE PRUDENTIAL INSURANCE
-----------------------------             COMPANY OF AMERICA
Print Name: illegible
            -----------------

-----------------------------
Print Name: illegible                     By: /s/ illegible
            -----------------                 ----------------------------------
                                               Name: illegible
                                                     ---------------------------
                                               Title: illegible
                                                      --------------------------

WITNESSES:                                TENANT:

                                          CELLIT, INC.

-----------------------------
Print Name:
            -----------------

                                          By: /s/ illegible
                                              ----------------------------------
                                               Name: illegible
                                                     ---------------------------
                                               Title: illegible
                                                      --------------------------

-----------------------------
Print Name:
            -----------------

WITNESSES:                                SUBTENANT:

                                          VELOCITEL, INC

----------------------------
Print Name:
           -----------------

                                          By: /s/ illegible
                                              ----------------------------------
                                               Name: illegible
                                                     ---------------------------
                                               Title: illegible
                                                      --------------------------

----------------------------
Print Name:
           -----------------

                                        4

<PAGE>

                                    EXHIBIT A
                                    ---------

                        [DEPICTION OF SUBLEASED PREMISES]
                        ---------------------------------

                                        1

<PAGE>

                                    EXHIBIT B
                                    ---------

                                   [SUBLEASE]
                                   ----------

                                        1<PAGE>

                                                                   Exhibit 10.26

                              EMPLOYMENT AGREEMENT
                              --------------------
                                   Alex Tellez
                                   -----------

     This Employment Agreement ("Agreement") is made and entered into on this
___ day of January, 2002, by and between Davox Corporation (the "Company" or
"Davox") and Alex Tellez (hereinafter called the "Executive").

                                    RECITALS
                                    --------

     A.   The Executive is currently employed as President & Chief Executive
          Officer of CELLIT, Inc.

     B.   CELLIT, Inc. has merged with and into Dolphin Acquisition Corp., which
          is a wholly-owned subsidiary of Davox

     C.   The Executive possesses intimate knowledge of the business and affairs
          of CELLIT, Inc.

     D.   Davox values Executive's knowledge of the business affairs of CELLIT,
          INC. and desires to employ Executive.

     E.   The Executive wishes to leave the employ of CELLIT, Inc. and become
          employed by Davox and is willing to make his services available to the
          Company on the terms and conditions hereinafter set forth.

                                    AGREEMENT
                                    ---------

     NOW, THEREFORE, in consideration of the premises and mutual covenants set
forth herein, the parties agree as follows:

                                    ARTICLE I
                       Employment At-Will and Best Efforts
                       -----------------------------------

     1.1  Subject to Article III, Executive's employment with the Company is on
an "at-will" basis. Either the Company or the Executive may terminate
Executive's employment at any time, for any or no reason, with or without prior
notice.

     1.2  During the period of Executive's employment by the Company, Executive
shall devote his full time and best efforts to the Company's business, and he
shall neither pursue any business opportunity outside the Company nor take any
position with any organization other than the Company without the approval of
the Company's Chief Executive Officer; provided, however, that Executive may
participate in professional, civic, social and/or charitable activities that do
not adversely affect his ability to carry out his responsibilities to the
Company.

<PAGE>

                                   ARTICLE II
                                  Compensation
                                  ------------

     2.1  The Executive shall be employed as Executive Vice President
Engineering reporting to the President & Chief Executive Officer of Davox
Corporation. Executive shall receive during the term of this Agreement a base
salary at the annual rate of Two Hundred Thousand Dollars ($200,000).
Executive's salary is subject to the review and discretion of Davox's Chief
Executive Officer.

     2.2  Executive shall be eligible to participate in the Executive Incentive
          Compensation Program. Total combined incentive at 100% of plan for the
          year shall be equal to 50% of base salary. Eligibility is extended on
          a quarterly and annual basis subject to the terms and conditions of
          the the Incentive Compensation Plan. Bonus criteria is based on
          Executive and company performance. A copy of the plan shall be
          furnished to the executive annually.

     2.3  Executive shall be eligible to participate in all benefits plans
offered by the Company subject to the general terms and conditions of each such
plan, and as such plans are amended from time-to-time.

     2.4  Davox will grant employee the option to purchase 125,0000 shares of
Davox's common stock. The option will be subject to the terms and conditions of
Davox's Stock Option Plan and Davox's standard Stock Option Agreement, which
will include, among other terms and conditions, a vesting schedule.

     2.5  Executive shall be eligible for vacation time each calendar year
during the term of this Agreement, subject to the terms and conditions of the
Company's standard vacation policy, as it is amended from time-to-time.

     2.6  Executive will be reimbursed for all authorized business expenses in a
manner consistent with the Company's standard expense reimbursement policy, as
it is amended from time-to-time.

     2.7  Executive's years of employment with CELLIT, Inc. shall be credited as
years of service to the Company for purposes of all Company plans and policies.

                                   ARTICLE III
                                    Severance
                                    ---------
     3.1  Executive will be eligible for severance payments if terminated "for
economic reason" as defined in Article 3.2 below. If terminated for economic
reasons as defined herein, the Company shall continue Executive's then current
base salary and medical benefits (at the Company's cost) for a period of six (6)
months from the date of termination or until such time as Executive obtains new
employment, whichever occurs first.

                                        2

<PAGE>

     3.2 For purposes of this Article III, a termination "for economic reasons"
shall mean: (i) the Executive's inclusion in an economic layoff; (ii) the
Executive's inclusion in a downsizing which results in the elimination of
Executive's position; or (iii) a downsizing and/or reorganization which would
require Executive to relocate more than seventy-five (75) miles.

     3.3 Receipt of the severance payment set forth in Article 3.1 is contingent
upon Executive's execution of a release of claims in a form reasonably
acceptable to the Company.

                                   ARTICLE IV
                                   Definitions
                                   -----------

     4.1 Company: The term "Company" in Articles V through XI, exclusively, of
         -------
this Agreement shall mean Davox Corporation and any parent, subsidiary,
affiliate, successor or assign of Davox Corporation (including without
limitation CELLIT, Inc. and its subsidiaries and affiliates).

     4.2 Confidential Information: The term "Confidential Information" shall
         ------------------------
mean any trade secret, proprietary or confidential information concerning the
organization, personnel, business or finances of the Company, or of any third
party which the Company is under an obligation to keep confidential, and that is
maintained by the Company as confidential. Such Confidential Information shall
include, but is not limited to, trade secrets, proprietary or confidential
information respecting existing and future products and services, designs,
methods, formulas, drafts of publications, research, know-how, techniques,
systems, databases, processes, software programs or code, developments or
experimental work, works of authorship, customer lists and/or customer
information, business plans, marketing plans, financial information, sales
techniques, projects, the Company's salary and/or pay rates, and other Company
personnel information.

     4.3 Developments: The term "Developments" shall mean any invention,
         ------------
modification, discovery, design, development, improvement, process, software
program, work of authorship, documentation, formula, data, technique, know-how,
trade secret or intellectual property right whatsoever or any interest therein
(whether or not patentable or registrable under copyright, trademark or similar
statutes, including, but not limited to, the Semiconductor Chip Protection Act,
or subject to analogous protection).

                                    ARTICLE V
                           Disclosure of Developments
                           --------------------------

     5.1 Executive agrees that he will forthwith communicate in writing to the
Board of Directors of the Company, or such officer or individual as the Board of
Directors of the Company may from time to time designate, a full and complete
disclosure of any and all Developments, research and other information,
discoveries and improvements made, developed,

                                        3

<PAGE>

conceived and/or reduced to practice by him, alone, or jointly with others (i)
while in the employ of the Company and (ii) during a one [1] year period
following the termination of his employment or other association with the
Company if such Developments, research, discoveries or improvements relate to
the business of the Company.

         5.2 The business of the Company includes any technical or business
interest that has been worked on by the Company in the past (including without
limitation any technical or business interest of CELLIT, Inc. and its
subsidiaries and affiliates), or in which there is work in progress at the
Company during the period of Executive's employment with the Company. The
business interests of the Company include Company operations or activities in
the planning stages. Executive understands that this disclosure of Developments
and the following assignment of Developments does not cover any of his patents
or patents applications that are filed or based exclusively on inventions made
by Executive before his employment or association with CELLIT, Inc.
             ------

                                   ARTICLE VI
                           Assignment of Developments
                           --------------------------

         6.1 If at any time or times during Executive's employment or other
association with the Company (including Executive's employment or other
association with CELLIT, Inc. and its subsidiaries and affiliates), Executive
has in the past (either alone or with others) made, conceived, created,
discovered, invented or reduced to practice any Development, and/or Executive
shall going forward (either alone or with others) make, conceive, create,
discover, invent or reduce to practice any Development, that (i) relates to the
business of the Company or any customer of or supplier to the Company or any of
the products or services being developed, manufactured or sold by the Company or
which may be used in relation therewith; or (ii) results from tasks assigned to
Executive by the Company; or (iii) results from the use of premises or personal
property (whether tangible or intangible) owned, leased or contracted for by the
Company, then all such Developments and the benefits thereof are and shall
immediately become the sole and absolute property of the Company and its
assigns, as works made for hire or otherwise. Executive shall promptly disclose
to the Company (or any persons designated by it) each such Development. At the
Company's expense, Executive hereby assigns all rights (including, but not
limited to, rights to inventions, patentable subject matter, copyrights and
trademarks) Executive may have or may acquire in the Developments and all
benefits and/or rights resulting therefrom to the Company and its assigns
without further compensation and shall communicate, without delay, and without
disclosing to others the same, all available information relating thereto (with
all necessary plans and models) to the Company.

         6.2 Executive will assist, upon request, in locating writings and other
physical evidence of the making of Executive's Developments and provide
unrecorded information relating to them, and give testimony in any proceeding in
which any of Executive's Developments or any application or patent directed
thereto may be involved, provided that if Executive is no longer employed by the
Company reasonable compensation shall be paid for such services. To the extent
feasible, the Company will use its best efforts to request such assistance at
times and places as will least interfere with any other employment of the
Executive.

                                        4

<PAGE>

         6.3 If the Company is unable, after reasonable effort, to secure
Executive's signature on any application for patent, copyright, trademark or
other analogous protection or other documents regarding any legal protection
relating to a Development assigned or assignable to the Company under this
Article VI, whether because of Executive's physical or mental incapacity or for
any other reason whatsoever, Executive hereby irrevocably designates and
appoints the Company and its duly authorized officers and agents as his agent
and attorney-in-fact, to act for and in his behalf and stead to execute and file
any such application or applications or other documents and to do all other
lawfully permitted acts to further the prosecution and issuance of patent,
copyright or trademark registrations or any other legal protection thereon with
the same legal force and effect as if executed by Executive.

         6.4 Executive will promptly disclose to the Company all material which
Executive has produced, composed or written, and which Executive shall produce,
compose or write, individually or in collaboration with others, which arises out
of work delegated to Executive by the Company. Executive agrees that all such
material constitutes a work for hire, and at the expense of the Company,
Executive hereby assigns to the Company all his interest in such copyrightable
material and will sign all papers and do all other acts necessary to assist the
Company to obtain copyrights on such material in any and all countries.

         6.5 Any Development relating to the Company's business made by
Executive within one [1] year following the termination of his employment (and
which is required to be disclosed in accordance with Section 5.1 above) shall be
presumed to be owned by the Company.

         6.6 Executive represents that the Developments identified in the
Appendix attached hereto, if any, comprise all the Developments that he has made
or conceived prior to his employment by the Company, which Developments are
excluded from this Agreement. Executive understands that it is only necessary to
list the title of such Developments and the purpose thereof, but not details of
the Development itself. IF THERE ARE ANY SUCH DEVELOPMENTS TO BE EXCLUDED, THE
UNDERSIGNED SHOULD INITIAL HERE; OTHERWISE IT WILL BE DEEMED THAT THERE ARE NO
SUCH EXCLUSIONS. ______________.

                                   ARTICLE VII
                                 Non-Disclosure
                                 --------------

         7.1 Executive agrees that he will not, at any time, whether during or
after the termination of his employment, without first obtaining the written
approval of the Board of Directors of the Company, or of such officer or
individual as the Board of Directors of the Company may from time to time
designate, divulge or disclose to any person or entity outside of the Company,
whether by private communications or by public address or publication, or
otherwise, any Confidential Information, except to the extent that such
disclosure is necessary to perform Executive's duties and fulfill Executive's
responsibilities as an employee of the Company or is required by law or legal
process. All original and copies of any Confidential Information or other
written materials relating to the business of the Company, however and whenever
produced, shall be the sole property of the Company, and shall be surrendered to
the Company upon termination of Executive's employment.

                                        5

<PAGE>

         7.2 Subject to Section 7.1, Executive shall keep confidential all
matters entrusted to him and shall not use or attempt to use any Confidential
Information, including confidential information related to third parties which
the Company is obligated to maintain as confidential, except as may be required
in the ordinary course of performing his duties as an employee of the Company,
nor shall he use any Confidential Information in any manner which may injure or
cause loss or may be calculated to injure or cause loss to the Company, whether
directly or indirectly.

                                  ARTICLE VIII
                                 Non-Competition
                                 ---------------

         8.1 Executive agrees that while in the employ of the Company and for
one [1] year thereafter (the "Restriction Term"), regardless of the reasons for
his termination, Executive shall not, directly or indirectly, alone or as a
consultant, partner, officer, director, employee, joint venturer, lender or
stockholder of any entity (a) accept employment or establish any other
relationship with any business within the United States that is in competition
with the products or services created, developed or under development,
manufactured or planning to be manufactured, marketed or planning to be
marketed, distributed or planning to be distributed, sold or planning to be
sold, by the Company at the time of his termination (collectively, the "Products
and Services"), or (b) engage in any business or activity within the United
States that is in competition with the Products and Services, provided, however,
that the record or beneficial ownership of five [5] percent or less of the
outstanding publicly traded capital stock of any entity shall not be deemed, in
and of itself, to be in violation of this Article.

         8.2 Executive acknowledges and agrees that any violation by him of the
terms of this Article by either accepting employment or establishing any other
relationship that is in competition with the Company's Products and Services
will result in the inevitable disclosure (either intentionally or otherwise) of
the Company's valuable and sensitive Confidential Information.

                                   ARTICLE IX
                          Non-Solicitation Of Customers
                          ------------------------------

         9.1 Executive agrees that during the Restriction Term, regardless of
the reasons for his termination from employment, he will not directly or
indirectly, alone or as a consultant, partner, officer, director, employee,
joint venturer, lender or stockholder of any entity, solicit or do business in
any capacity that competes with any of the Company's Products and Services with
any customer of the Company or any potential customer of the Company (a) with
whom Executive had contact during the course of his employment with the Company,
or (b) about whom Executive obtained Confidential Information during the course
of his employment with the Company.

                                       6

<PAGE>

                                    ARTICLE X
                     Non-Solicitation/Non-Hire Of Employees
                     ---------------------------------------

         10.1 Executive agrees that during the Restriction Term, regardless of
the reasons for his termination, he will not directly or indirectly, alone or as
a consultant, partner, officer, director, employee, joint venturer, lender or
stockholder of any entity, recruit, solicit for hire, hire or knowingly and with
his involvement encourage (explicitly or implicitly) any company or business
organization in which he is employed or which is directly or indirectly
controlled by him to recruit, solicit for hire or hire any Company employee,
agent, representative or consultant, or any such person who has terminated
his/her relationship with the Company within six months of Executive's departure
from the Company.

                                   ARTICLE XI
                                Company Property
                                ----------------

         11.1 Except for de minimis personal use, at Executive's cost, Executive
agrees that during his employment he shall not make, use or permit to be used
any Company Property otherwise than for the benefit of the Company. The term
"Company Property" shall include all notes, memoranda, reports, lists, records,
drawings, sketches, rolodexes, specifications, software programs, software code,
data, computers, cellular telephones, pagers, palm pilots and their equivalents,
credit and/or calling cards, keys, access cards, documentation or other
materials of any nature and in any form, whether written, printed, electronic or
in digital format or otherwise, relating to any matter within the scope of the
business of the Company or concerning any of its dealings or affairs, and any
other Company property in Executive's possession, custody or control. Executive
further agrees that he shall not, after the termination of his employment, use
or permit others to use any such Company Property. Executive acknowledges and
agrees that all Company Property shall be and remain the sole and exclusive
property of the Company. Immediately upon the termination of his employment
Executive shall deliver all Company Property in my possession, and all copies
thereof, to the Company.

                                   ARTICLE XII
                          Acknowledgement By Executive
                          ----------------------------

         12.1 Executive acknowledges and confirms that (i) the restrictive
covenants contained in this Agreement are reasonably necessary to protect the
legitimate business interests of the Company, and (ii) the restrictions
contained in this Agreement (including without limitation the length of the term
of the provisions) are not overboard, overlong, or unfair and are not the result
of overreaching, duress or coercion of any kind. Executive further acknowledges
and confirms that his full, uninhibited and faithful observance of each of the
covenants contained in this Agreement will not cause him any undue hardship,
financial or otherwise, and that enforcement of each of the covenants contained
herein will not impair his ability to obtain employment commensurate with his
abilities and on terms fully acceptable to him or otherwise to obtain income
required for the comfortable support of him and his family and the satisfaction
of the needs of his creditors. The Executive acknowledges and confirms that his
special knowledge of

                                        7

<PAGE>

the business of the Company is such as would cause the Company serious injury or
loss if he were to use such ability and knowledge to the benefit of a competitor
or were to compete with the Company in violation of the terms of this Agreement.
The Executive further acknowledges that the restrictions contained in this
Agreement are intended to be, and shall be, for the benefit of and shall be
enforceable by, the Company's successors and assigns.

                                  ARTICLE XIII
                               General Provisions
                               ------------------

         13.1 Executive agrees that this Agreement shall be binding upon him
irrespective of the duration of his employment or other association with the
Company, the reasons for the cessation of his employment or other association
with the Company, or the amount of his wages and/or salary.

         13.2 Executive agrees that any breach of this Agreement by him will
cause irreparable damage to the Company and in the event of such breach the
Company shall have, in addition to any and all remedies of law, the right to an
injunction, specific performance or other equitable relief to prevent the
violations of my obligations hereunder.

         13.3 This Agreement sets forth the complete, sole and entire agreement
between the parties with respect to the subject matter herein and supersedes any
and all other agreements, negotiations, discussions, proposals, or
understandings, whether oral or written, previously entered into, discussed or
considered by the parties, including that certain Amended and Restated
Employment Agreement that Executive entered into with CELLIT, Inc. on November
19, 1998. Executive represents, warrants and agrees that entering into the
instant Agreement, and the employment relationship with the Company, does not
constitute a termination without cause by CELLIT, Inc. of Executive as that term
is used in the Amended and Restated Employment Agreement. No modification or
variation to this Agreement shall be deemed valid unless in writing and signed
by the Company and Executive.

         13.4 Executive does not have the right to assign or delegate his rights
or obligations hereunder to any other person and this Agreement shall be binding
upon Executive's heirs, executors, administrators and legal representatives. The
Company has the right to assign this Agreement by operation of law or otherwise,
without notice, to any entity which acquires by merger or otherwise a majority
voting interest in Company. This Agreement shall inure to the benefit of the
successors and assigns of the Company.

         13.5 Executive represents and warrants to the Company that he is not
under any obligations to any person, firm, corporation, or other business entity
other than the Company, and has no other interest which is inconsistent or in
conflict with this Agreement, or which would prevent, limit or impair, in any
way, the performance by him of any of the covenants hereunder or his duties in
his employment with the Company. Executive has not entered into, and shall not
enter into, any agreement either oral or written in conflict herewith.

         13.6 Any waiver by either party of a breach of any provision of this
Agreement shall not operate or be construed as a waiver of any subsequent breach
of such provision or any other

                                        8

<PAGE>

provision hereof. In addition, any amendment to or modification of this
Agreement or any waiver of any provision hereof must be in writing and signed by
the Company and Executive.

         13.7 The parties agree that each provision and the subparts of each
provision herein shall be treated as a separate and independent clause, and the
unenforceability of any one clause shall in no way impair the enforceability of
any of the other clauses of the Agreement. Moreover, if one or more of the
provisions contained in this Agreement shall for any reason be held to be
excessively broad as to scope, activity, subject or otherwise, so as to be
unenforceable by law, such provision or provisions shall be construed by the
appropriate judicial body by limiting or reducing it or them, so as to be
enforceable to the maximum extent compatible with the applicable law as it shall
then appear. The parties hereby further agree that the language of all parts of
this agreement shall in all cases be construed as a whole according to its fair
meaning and not strictly for or against either of the parties.

         13.8 The headings contained herein are for the sole purpose of
convenience of reference, and shall not in any way limit or affect the meaning
or interpretation of any of the terms or provisions of this Agreement.

         13.9 Executive acknowledges and agrees that the Company conducts
business throughout the United States and that the Company has an interest in
the uniform interpretation and enforcement of its Employment Agreements.
Accordingly, the Company and Executive acknowledge and agree that this Agreement
shall be governed by and construed in accordance with the laws of the
Commonwealth of Massachusetts and shall in all respects be interpreted, enforced
and governed under the internal and domestic laws of such state, without giving
effect to the principles of conflicts of laws of such state.

                                        9

<PAGE>

AGREED AND ACCEPTED:

Employee:   /s/ Alex Tellez                         Date: 1/10/02
            ------------------                            -------
            Alex Tellez

Witness:    /s/ Jose Villena                        Date: 1/10/02
            ----------------                              -------

Company:    Davox Corporation

            By: /s/ Paul R. Lucchese
               ---------------------
            Name: Paul R. Lucchese
                  ----------------
            Title: VP, General Counsel & Secretary
                   -------------------------------

                                       10

<PAGE>

                    APPENDIX - TITLE/PURPOSE OF DEVELOPMENTS

         The following is a complete list of all Developments and the purpose of
those Developments:

                                               X     No Developments
                                           --------

                                           ________  See Below

Developments and purpose:
------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

                                       /s/ Alex Tellez
                                       ---------------
                                       Employee Signature

                                       Alex Tellez
                                       -----------
                                       Print Name

                                       11

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