Document:

<PAGE>

                                                                     EXHIBIT 4.4

                               SECURITY AGREEMENT

To:               Laurus Master Fund, Ltd.
                  c/o Onshore Corporate Services, Ltd.
                  P.O. Box 1234 G.T
                  Queensgate House
                  South Church Street
                  Grand Cayman, Cayman Islands

Gentlemen:

         1.       To secure the payment of all Obligations (as hereafter
defined), we hereby grant to you a continuing security interest in all of the
following property now owned or at any time hereafter acquired by us, or in
which we now have or at any time in the future may acquire any right, title or
interest (the "Collateral"): all accounts, inventory, equipment, goods,
documents, instruments (including, without limitation, promissory notes),
contract rights, general intangibles (including, without limitation, payment
intangibles), chattel paper, supporting obligations, investment property,
letter-of-credit rights, trademarks and tradestyles in which we now have or
hereafter may acquire any right, title or interest, all proceeds and products
thereof (including, without limitation, proceeds of insurance) and all
additions, accessions and substitutions thereto or therefor.

         2.       The term "Obligations" as used herein shall mean and include
all debts, liabilities and obligations owing by each of us to you under that
certain Guaranty, dated as of the date hereof, as amended, modified and
supplemented from time to time (as so amended, modified and supplemented, the
"Guaranty") and all obligations owing by Numerex Corp. ("Company") to you under
the Convertible Term Note dated as of the date hereof in the original principal
amount of $4,500,000, as amended, modified and supplemented from time to time or
otherwise (as so amended, modified and supplemented from time to time, the
"Note").

         3.       We hereby represent, warrant and covenant to you that: (a)
each of us is a legal entity validly existing, in good standing and formed under
the laws of the jurisdictions set forth below our names on the signature pages
hereto with an organization identification number set forth below our names on
the signature pages hereto and we will provide you thirty (30) days' prior
written notice of any change in our state of formation; (b) our legal names are
as set forth on the signature pages hereto and are identical to that which is
set forth in our certificates or articles of incorporation or other constitutive
documents, as amended through the date hereof; (c) we are the lawful owner of
the Collateral and have the sole right to grant a security interest therein and
will defend the Collateral against all claims and demands of all persons and
entities; (d) we will keep the Collateral free and clear of all attachments,
levies, taxes, liens, security interests and encumbrances of every kind and
nature ("Encumbrances"), except to the extent said Encumbrance does not secure
indebtedness in excess of $150,000 on a combined basis for each of us at any one
time and such Encumbrance is removed or otherwise released within 10 business
days of the creation thereof; (e) we will at our own cost and expense use
commercially

<PAGE>

reasonable efforts to keep the Collateral in good state of repair (ordinary wear
and tear excepted) and will use commercially reasonable efforts not to waste or
destroy the same or any part thereof other than ordinary course discarding of
items no longer used or useful in our business; (f) we will not without your
prior written consent, sell, exchange, lease or otherwise dispose of the
Collateral or any of our rights therein, whether by sale, lease or otherwise,
except for (I) Permitted Non-Core Asset Sales (as defined in the Note), (II) the
sale of inventory in the ordinary course of business and (III) the disposition
or transfer in the ordinary course of business during any fiscal year of
obsolete and worn-out equipment having an aggregate fair market value of not
more than $37,500 and only to the extent that (i) the proceeds of any such
equipment disposition are used to acquire replacement equipment which is subject
to your first priority security interest or are used to repay Obligations or to
pay general corporate expenses, or (ii) following the occurrence of an Event of
Default which continues to exist the proceeds of which are remitted to you to be
held as cash collateral for the Obligations; (g) we will name you as an
additional insured and lender's loss payee under all of our policies of
insurance which shall insure, without limitation, the Collateral against such
losses, damages and hazards as you shall reasonably require and in amounts and
under policies issued by insurers reasonably acceptable to you. If we fail to do
so, you may procure such insurance and the cost thereof shall constitute
Obligations; (h) we will at all reasonable times and upon reasonable advance
notice (except that such notice shall not be required in the event you
reasonably believe such access is necessary to preserve or protect the
Collateral and/or during the continuance of an Event of Default) allow you or
your representatives free access to and the right of inspection of the
Collateral provided that you do not unreasonably interfere with our normal
business operations; (i) we hereby indemnify and save you harmless from all
loss, costs, damage, liability and/or expense, including reasonable attorneys'
fees, that you may sustain or incur to enforce payment, performance or
fulfillment of any of the Obligations and/or in the enforcement of this
Agreement or in the prosecution or defense of any action or proceeding either
against you or us concerning any matter growing out of or in connection with
this Agreement, and/or any of the Obligations and/or any of the Collateral,
except to the extent caused by your own gross negligence or willful misconduct;
(j) with respect to all accounts arising out of contracts between us and the
United States of America, or any state, or any department, agency or
instrumentality of any of them (each, a "Government Contract"), we will, upon
your request, comply with any governmental notice or approval requirements,
including, without limitation, compliance with the Federal Assignment of Claims
Act, and (k) each account shall conform to the following criteria: (i) shipment
of the merchandise or rendition of services has been completed, (ii) merchandise
or services shall not have been rejected or disputed by the account debtor and
there shall not have been asserted any offset, defense or counterclaim (other
than any such rejections, disputes, offsets, defenses or counterclaims which are
asserted in the ordinary course of business), and (iii) each such account shall
be a good and valid account representing an undisputed bona fide indebtedness
(other than in connection with any such dispute arising in the ordinary course
of business) incurred by the account debtor liable therefor, for a fixed sum as
set forth in the invoice relating thereto with respect to an unconditional sale
and delivery upon the stated terms of goods sold by us, or work, labor and/or
services rendered by us, as applicable. You acknowledge that concurrent with
each such sale, and your receipt in immediately available funds of all proceeds
of such required to be paid to you pursuant to the Note, you shall promptly take
all action

                                        2
<PAGE>

reasonably requested by us to release your security interest in those assets
sold pursuant to a Permitted Non-Core Asset Sale.

         4.       Following the occurrence and during the continuance of an
Event of Default, you shall have the right to instruct all of our account
debtors to remit payments on all accounts in accordance with your express
written instructions. If, despite such instructions, we shall receive any
payments with respect to accounts, we shall receive such payments in trust for
your benefit, shall segregate such payments from our other funds and shall
deliver or cause to be delivered to you, in the same form as so received with
all necessary endorsements, all such payments as soon as practicable, but in no
event later than five (5) business days after our receipt thereof. Following the
occurrence and during the continuation of an Event of Default, you shall have
full power and authority to collect each account, through legal action or
otherwise, and may settle, compromise, or assign (in whole or in part) the claim
for any account, or otherwise exercise any other right now existing or hereafter
arising with respect to any account if such action is commercially reasonable
and will expedite collection.

         5.       We shall be in default under this Agreement upon the happening
of any of the following events or conditions, each such event or condition being
an "Event of Default" (a) the occurrence of any Event of Default under and as
defined in the Note and/or Guaranty which is not cured within any applicable
notice, cure, grace or similar period; (b) any warranty, representation or
statement made or furnished to you by any of us or on our behalf was false in
any material respect when made or furnished; (c) any of us shall breach in any
material respect any provision of this Agreement, as the same may be amended,
modified and supplemented from time to time, and such breach shall not have been
cured during any applicable notice, cure, grace or similar period; (d) except to
the extent otherwise expressly permitted hereunder, the loss, theft, damage,
destruction, sale or encumbrance to or of any of the Collateral or the making of
any levy, seizure or attachment thereof or thereon except to the extent (i) said
levy, seizure or attachment does not secure indebtedness in excess of $100,000
and such levy, seizure or attachment has not been removed or otherwise released
within 10 business days of the creation or the assertion thereof or (ii) (I)
with respect to any loss, theft, destruction or damage to or of any of the
Collateral (collectively, a "Loss") in an aggregate amount equal to $1,000,000
or more on a combined basis for all Collateral, you shall have received within
ninety (90) days of the occurrence of such Loss insurance proceeds in an amount
not less than ninety percent (90%) of the fair market value of the Collateral
subject to such Loss and (II) with respect to any Loss in an aggregate amount
less than $1,000,000 on a combined basis for all Collateral, you shall have
repaired, replaced or otherwise restored the Collateral subject to such Loss
within ninety (90) days of the occurrence of such Loss; (e) other than in
connection with a Permitted Transaction, any of us shall become insolvent, cease
operations, dissolve, terminate our business existence, make an assignment for
the benefit of creditors, or suffer the appointment of a receiver, trustee,
liquidator or custodian of all or any part of our property; (f) any proceedings
under any bankruptcy or insolvency law shall be commenced by or against any of
us and if commenced against us shall not be dismissed within 45 days; (g) any of
us shall repudiate or purport to revoke any of our obligations under the Note or
any guaranty agreement made by any of us in favor of you after expiration of
applicable cure, notice, grace or similar period; or (h) if any Core Company
shall at any time transfer in any manner whatsoever, including by way of merger,

                                        3
<PAGE>

consolidation or otherwise, any of its assets to a Non-Core Company. For
purposes of subsection (e) above, the term "Permitted Transaction" shall mean a
Permitted Non-Core Asset Sale or any winding-up, dissolution, merger or
liquidation of any subsidiary of the Company following the sale of all or
substantially all of its assets as a result of a Permitted Non-Core Asset Sale.
For purposes of subsection (h) above, the following terms shall have the
following meanings: (1) "Core Company" shall mean any one or more of the
following companies: Numerex Corp. (a Pennsylvania corporation), Numerex
Solutions, LLC (a Delaware limited liability company), Cellemetry LLC (a
Delaware limited liability company), Numerex Investment Corp. (a Delaware
corporation), Mobileguardian LLC (a Delaware limited liability company) and
Uplink Security, Inc. (a Georgia corporation); and (2) "Non-Core Company" shall
mean any one or more of the following companies: Digilog Inc. (a Pennsylvania
corporation), DCX Systems Inc. (a Pennsylvania corporation), DCX Systems
Australia PTY Limited (an Australian company), Broadband Networks Inc. (a
Delaware corporation) and BNI Solutions LLC (a Delaware limited liability
company). You hereby acknowledge that you will not unreasonably withhold your
consent to any non-bankruptcy internal corporate reorganization or restructuring
of the Company and/or any of its subsidiaries.

         6.       Upon the occurrence of any Event of Default and for so long as
such Event of Default is continuing, you may declare all Obligations immediately
due and payable and you shall have the remedies of a secured party provided in
the Uniform Commercial Code as in effect in the State of New York, this
Agreement and other applicable law. Upon the occurrence of any Event of Default
and for so long as such Event of Default is continuing, you will have the right
to take possession of the Collateral and to maintain such possession on our
premises or to remove the Collateral or any part thereof to such other premises
as you may desire. Upon your request (following the occurrence of an Event of
Default for so long as such Event of Default is continuing), we shall assemble
the Collateral and make it available to you at a place designated by you. If any
notification of intended disposition of any Collateral is required by law, such
notification, if mailed, shall be deemed properly and reasonably given if mailed
at least ten (10) days before such disposition, postage prepaid, addressed to us
either at our address shown herein or at any other address for such notice as we
may provide you from time to time in writing pursuant to Section 11 hereof. Any
proceeds of any disposition of any of the Collateral shall be applied by you in
the following order to the extent of any such proceeds: first, to the payment of
all reasonable expenses in connection with the sale of the Collateral, including
reasonable attorneys' fees and other legal expenses and disbursements and the
reasonable expense of retaking, holding, preparing for sale, selling, and the
like, second, toward the payment of the Obligations in such order of application
as you may elect subject to the terms of the Note, and third, to us or as
otherwise required by the Uniform Commercial Code or as a court of competent
jurisdiction may direct.

         7.       If we default in the performance or fulfillment of any of the
terms, conditions, promises, covenants, provisions or warranties on our part to
be performed or fulfilled under or pursuant to this Agreement, you may, at your
option without waiving your right to enforce this Agreement according to its
terms, at any time after five (5) days' written notice to Numerex Corp., as our
agent (provided that no such notice shall be required in the event prompt action
is necessary to preserve or protect the Collateral), perform or fulfill the same
or cause the

                                        4
<PAGE>

performance or fulfillment of the same for our account and at our sole cost and
expense, and the reasonable out-of-pocket cost and expense thereof (including
reasonable attorneys' fees) shall be added to the Obligations and shall be
payable on demand with interest thereon at the highest interest rate under the
Note.

         8.       We appoint you, any of your officers, employees or any other
person or entity whom you may designate as our attorney, with power to execute
such documents in our behalf and to supply any omitted information and correct
patent errors in any documents executed by us or on our behalf; to file
financing statements against us covering the Collateral; to sign our name on
public records only if and to the extent necessary to evidence, perfect and/or
preserve the security interest created pursuant to this Agreement; and to take
all such other reasonable actions that are necessary to carry out this
Agreement. We hereby ratify and approve all acts of the attorney and neither you
nor the attorney will be liable for any acts of commission or omission, nor for
any error of judgment or mistake of fact or law other than gross negligence or
willful misconduct. This power being coupled with an interest, is irrevocable so
long as any Obligations remains unpaid.

         9.       No delay or failure on your part in exercising any right,
privilege or option hereunder shall operate as a waiver of such or of any other
right, privilege, remedy or option, and no waiver whatever shall be valid unless
in writing, signed by you and then only to the extent therein set forth, and no
waiver by you of any default shall operate as a waiver of any other default or
of the same default on a future occasion. You shall have the right to enforce
any one or more of the remedies available to you, successively, alternately or
concurrently. We agree to join with you in executing financing statements or
other instruments to the extent required by the Uniform Commercial Code in form
satisfactory to you and in executing such other documents or instruments as may
be reasonably required or deemed necessary by you for purposes of effecting or
continuing your security interest in the Collateral.

         10.      This Agreement cannot be changed or terminated orally, and
shall be governed by and construed in accordance with the laws of the State of
New York, without regard to principles of conflicts of laws. Any action brought
by either party against the other concerning the transactions contemplated by
this Agreement shall be brought only in any state or federal court sitting in
the Borough of Manhattan, City of New York; provided that nothing contained in
this Agreement shall be deemed to preclude you from bringing suit or taking
other legal action in any other court of competent jurisdiction and nothing
shall be deemed to preclude us from asserting any defenses or counterclaims in
any such actions. You, we and the individuals executing this Agreement agree to
submit to the jurisdiction of such courts and waive trial by jury. You, we and
the individuals executing this Agreement further consent that any summons,
subpoena or other process or papers (including, without limitation, any notice
or motion or other application to either of the aforementioned courts or a judge
thereof) or any notice in connection with any proceedings hereunder, may be
served by registered or certified mail, return receipt requested, or by personal
service provided a reasonable time for appearance is permitted, or in such other
manner as may be permissible under the rules of said courts. You, we and the
individuals executing this Agreement waive any objection to jurisdiction and
venue of any action instituted hereon in the Supreme Court for the State of New
York, County of New York or the United

                                        5
<PAGE>

States District Court for the Southern District of New York and shall not assert
any defense based on lack of jurisdiction or venue or based upon forum non
conveniens in any action brought in either such court.

         11.      All notices from you to us shall be sufficiently given if
mailed or delivered to us at our address set forth below unless you shall have
received from us in writing another address for notices. Copies of all notices
to us shall also be sent to: Legal Counsel, Numerex Corp., 1600 Parkwood Circle
SE, Suite 200, Atlanta, Georgia 30339, facsimile: (770) 693-5951, and Richard
Baltz, Esq., Arnold & Porter, 555 12th Street, N.W., Washington, D.C. 20004,
facsimile: (202) 942-5999.

                       [SIGNATURE LINES ON FOLLOWING PAGE]

                                        6
<PAGE>

                  [SIGNATURE PAGE NO. 1 TO SECURITY AGREEMENT]

                                     Very truly yours,

                                     NUMEREX CORP.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: CEO
                                         ------------------------------
                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339

                                     State of Formation: Pennsylvania
                                     Org. ID#: PA2569500

                                     NUMEREX SOLUTIONS LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: MANAGER
                                         ------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339

                                     State of Formation: Delaware
                                     Org. ID#: DE3361359

                                     CELLEMETRY LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: MANAGER
                                         ------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339

                                     State of Formation: Delaware
                                     Org. ID#: DE2896495

                  [SIGNATURE LINES CONTINUED ON FOLLOWING PAGE]

                                        7
<PAGE>

                  [SIGNATURE PAGE NO. 2 TO SECURITY AGREEMENT]

                                     NUMEREX INVESTMENT CORP.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: CEO
                                         ------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339

                                     State of Formation: Delaware
                                     Org. ID#: DE2429448

                                     BROADBAND NETWORKS INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: CEO
                                         ------------------------------

                                     Address: 2820 E. College Ave. Suite B
                                              State College, PA 16801-7548

                                     State of Formation: Delaware
                                     Org. ID#: DE2280048

                                     BNI SOLUTIONS LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its:  MANAGER
                                         ------------------------------

                                     Address: 2820 E. College Ave. Suite B
                                              State College, PA 16801-7548

                                     State of Formation: Delaware
                                     Org. ID#: DE3410681

                  [SIGNATURE LINES CONTINUED ON FOLLOWING PAGE]

                                        8
<PAGE>

                  [SIGNATURE PAGE NO. 3 TO SECURITY AGREEMENT]

                                     DIGILOG INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: CEO
                                         ------------------------------

                                     Address: 2360 Maryland Road
                                              Willow Grove, PA 19090

                                     State of Formation: Pennsylvania
                                     Org. ID#: PA2587972

                                     DCX SYSTEMS INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: CEO
                                         ------------------------------

                                     Address: 2360 Maryland Road
                                              Willow Grove, PA 19090

                                     State of Formation: Pennsylvania
                                     Org. ID#: PA2608798

                                     DCX SYSTEMS AUSTRALIA PTY LIMITED

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its:  DIRECTOR
                                         ------------------------------

                                     Address: Lindfield Executive Centre
                                              12 Tryon Rd.
                                              P.O. Box 42
                                              Lindfield, NSW 2072, Australia

                                     State of Formation: Australia
                                     Org. ID#: 078013573

                  [SIGNATURE LINES CONTINUED ON FOLLOWING PAGE]

                                        9
<PAGE>

                  [SIGNATURE PAGE NO. 4 TO SECURITY AGREEMENT]

                                     MOBILEGUARDIAN LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: MANAGER
                                         ------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339

                                     State of Formation: Delaware
                                     Org. ID#: DE3597074

                                     UPLINK SECURITY, INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        -------------------------------
                                     Its: CEO
                                         ------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339

                                     State of Formation: Georgia
                                     Org. ID#: GAK823623

                                     Dated as of: January 13, 2004

ACKNOWLEDGED:

LAURUS MASTER FUND, LTD.

By: /s/ DAVID GRIN
   ----------------------------
Its:
    ---------------------------
                                       10
<PAGE>

STATE OF Georgia)
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Numerex Corp., the corporation described in and which executed the
above instrument; and that s/he signed her/his name thereto by order of the
board of directors of said corporation.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the manager of Numerex Solutions LLC, the limited liability company described
in and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the manager of Cellemetry, LLC, the limited liability company described in
and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

                                       11
<PAGE>

STATE OF Georgia)
     : ss.:
COUNTY OF Cobb)

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Numerex Investment Corp., the corporation described in and which
executed the above instrument; and that s/he signed her/his name thereto by
order of the board of directors of said corporation.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of BroadBand Networks Inc., the corporation described in and which
executed the above instrument; and that s/he signed her/his name thereto by
order of the board of directors of said corporation.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )
                                     ________________________________

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the manager of BNI Solutions LLC, the limited liability company described in
and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

                                       12
<PAGE>

STATE OF Georgia)
     : ss.:
COUNTY OF Cobb)

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Digilog Inc., the corporation described in and which executed the
above instrument; and that s/he signed her/his name thereto by order of the
board of directors of said corporation.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of DCX Systems Inc., the corporation described in and which executed
the above instrument; and that s/he signed her/his name thereto by order of the
board of directors of said corporation.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the Director of DCX Systems Australia PTY Limited, the ______________
described in and which executed the above instrument; and that s/he signed
her/his name thereto by order of the board of directors of said
__________________.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

                                       13
<PAGE>

STATE OF Georgia)
     : ss.:
COUNTY OF Cobb)

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the manager of MobileGuardian LLC, the limited liability company described in
and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

STATE OF Georgia    )
     : ss.:
COUNTY OF Cobb      )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Uplink Security, Inc., the corporation described in and which
executed the above instrument; and that s/he signed her/his name thereto by
order of the board of directors of said corporation.

                                     Pamela S. Lester
                                     -----------------------
                                     Notary Public

                                       14<PAGE>

                                                                     EXHIBIT 4.5

                                    GUARANTY

New York, New York                                              January 13, 2004

         FOR VALUE RECEIVED, and in consideration of loans made or to be made or
credit otherwise extended or to be extended by LAURUS MASTER FUND, LTD.
("Laurus") to or for the account of NUMEREX CORP. ("Company") from time to time
and at any time and for other good and valuable consideration and to induce
Laurus, in its discretion, to make such loans or extensions of credit and to
make or grant such renewals, extensions, releases of collateral or
relinquishments of legal rights as Laurus may deem advisable, the undersigned
(and each of them if more than one, the liability under this Guaranty being
joint and several) (jointly and severally referred to as "Guarantor" or "the
undersigned") unconditionally guaranties to Laurus, its successors, endorsees
and assigns the prompt payment when due (whether by acceleration or otherwise)
of all present and future obligations and liabilities of any and all kinds of
Company to Laurus arising under, out of, or in connection with that certain
Convertible Term Note dated as of the date hereof made by Company in favor of
Laurus (as amended, modified, restated or supplemented from time to time, the
"Note") and all other documents, agreements and instruments of any nature
entered into in connection therewith (the Note and all such other documents,
agreements and instruments, collectively, the "Documents") (all of which are
herein collectively referred to as the "Obligations"), and irrespective of the
genuineness, validity, regularity or enforceability of such Obligations, or of
any instrument evidencing any of the Obligations or of any security interest in
and to any collateral therefor or of the existence or extent of such collateral,
and irrespective of the allowability, allowance or disallowance of any or all of
the Obligations in any case commenced by or against Company under Title 11,
United States Code, including, without limitation, obligations or indebtedness
of Company for post-petition interest, fees, costs and charges that would have
accrued or been added to the Obligations but for the commencement of such case.
In furtherance of the foregoing, the undersigned hereby agrees as follows:

         1.       No Impairment. Laurus may at any time and from time to time,
either before or after the maturity thereof, without notice to or further
consent of the undersigned, extend the time of payment of, exchange or surrender
any collateral for, renew or extend any of the Obligations or increase or
decrease the interest rate thereon, and may also make any agreement with Company
or with any other party to or person liable on any of the Obligations, or
interested therein, for the extension, renewal, payment, compromise, discharge
or release thereof, in whole or in part, or for any modification of the terms
thereof or of any agreement between Laurus and Company or any such other party
or person, or make any election of rights Laurus may deem desirable under the
United States Bankruptcy Code, as amended, or any other federal or state
bankruptcy, reorganization, moratorium or insolvency law relating to or
affecting the enforcement of creditors' rights generally (any of the foregoing,
an "Insolvency Law") without in any way impairing or affecting this Guaranty.
This Guaranty shall be effective regardless of the subsequent incorporation,
merger or consolidation of Company, or any change in the composition, nature,
personnel or location of Company and shall extend to any successor entity to
Company, including a debtor in possession or the like under any Insolvency Law.

<PAGE>

         2.       Guaranty Absolute. The undersigned guarantees that the
Obligations will be paid strictly in accordance with the terms of the Note
and/or any other document, instrument or agreement creating or evidencing the
Obligations, regardless of any law, regulation or order now or hereafter in
effect in any jurisdiction affecting any of such terms or the rights of Company
with respect thereto. Guarantor hereby knowingly accepts the full range of risk
encompassed within a contract of "continuing guaranty" which risk includes the
possibility that Company will contract additional indebtedness for which
Guarantor may be liable hereunder after Company's financial condition or ability
to pay its lawful debts when they fall due has deteriorated, whether or not
Company has properly authorized incurring such additional indebtedness. The
undersigned acknowledges that (i) no oral representations, including any
representations to extend credit or provide other financial accommodations to
Company, have been made by Laurus to induce the undersigned to enter into this
Guaranty and (ii) any extension of credit to the Company shall be governed
solely by the provisions of the Note, the other Documents and applicable law.
The liability of the undersigned under this Guaranty shall be absolute and
unconditional, in accordance with its terms, and shall remain in full force and
effect without regard to, and shall not be released, suspended, discharged,
terminated or otherwise affected by, any circumstance or occurrence whatsoever,
including, without limitation: (a) any waiver, indulgence, renewal, extension,
amendment or modification of or addition, consent or supplement to or deletion
from or any other action or inaction under or in respect of the Documents or any
other instruments or agreements relating to the Obligations or any assignment or
transfer of any thereof, (b) any lack of validity or enforceability of any
Document or other documents, instruments or agreements relating to the
Obligations or any assignment or transfer of any thereof to an assignee of the
Note permitted pursuant to the terms of the Note and the other Documents, (c)
any furnishing of any additional security to Laurus or its assignees or any
acceptance thereof or any release of any security by Laurus or its assignees,
(d) any limitation on any party's liability or obligation under the Documents or
any other documents, instruments or agreements relating to the Obligations or
any assignment or transfer of any thereof to an assignee of the Note permitted
pursuant to the terms of the Note and the other Documents, or any invalidity or
unenforceability, in whole or in part, of any such document, instrument or
agreement or any term thereof, (e) any bankruptcy, insolvency, reorganization,
composition, adjustment, dissolution, liquidation or other like proceeding
relating to Company, or any action taken with respect to this Guaranty by any
trustee or receiver, or by any court, in any such proceeding, whether or not the
undersigned shall have notice or knowledge of any of the foregoing, (f) any
exchange, release or nonperfection of any collateral, or any release, or
amendment or waiver of or consent to departure from any guaranty or security,
for all or any of the Obligations or (g) any other circumstance which might
otherwise constitute a defense available to, or a discharge of, the undersigned.
Any amounts due from the undersigned to Laurus shall bear interest until such
amounts are paid in full at the highest rate then applicable to the Obligations
(but without duplication of any interest accrued or payable under the Note).
Obligations include post-petition interest whether or not allowed or allowable.

         3.       Waivers. (a) This Guaranty is a guaranty of payment and not of
collection. Laurus shall be under no obligation to institute suit, exercise
rights or remedies or take any other action against Company or any other person
liable with respect to any of the Obligations or resort to any collateral
security held by it to secure any of the Obligations as a condition precedent to
the undersigned being obligated to perform as agreed herein and Guarantor hereby
waives to the

                                       2
<PAGE>

fullest extent permitted by applicable law any and all rights which it may have
by statute or otherwise which would require Laurus to do any of the foregoing.
Guarantor further consents and agrees that Laurus shall be under no obligation
to marshal any assets in favor of Guarantor, or against or in payment of any or
all of the Obligations. The undersigned hereby waives all suretyship defenses
and any rights to interpose any defense, counterclaim or offset of any nature
and description which the undersigned may have by virtue of its status as a
guarantor or surety of the Obligations.

                  (b)      The undersigned further waives (i) notice of the
acceptance of this Guaranty, of the making of any such loans or extensions of
credit, and of all notices and demands of any kind to which the undersigned may
be entitled, including, without limitation, notice of adverse change in
Company's financial condition or of any other fact which might materially
increase the risk of the undersigned and (ii) presentment to or demand of
payment from anyone whomsoever liable upon any of the Obligations, protest,
notices of presentment, non-payment or protest and notice of any sale of
collateral security or any default of any sort, other than to the extent any
such notice is required under the Note, the other Documents or applicable law.

                  (c)      Notwithstanding any payment or payments made by the
undersigned hereunder, or any setoff or application of funds of the undersigned
by Laurus, the undersigned shall not be entitled to be subrogated to any of the
rights of Laurus against Company or against any collateral or guarantee or right
of offset held by Laurus for the payment of the Obligations, nor shall the
undersigned seek or be entitled to seek any contribution or reimbursement from
Company in respect of payments made by the undersigned hereunder, in each case
until all amounts owing to Laurus by Company on account of the Obligations are
paid in full and the Note has been terminated. If, notwithstanding the
foregoing, any amount shall be paid to the undersigned on account of such
subrogation rights at any time when all of the Obligations shall not have been
paid in full and the Note shall not have been terminated, such amount shall be
held by the undersigned in trust for Laurus, segregated from other funds of the
undersigned, and shall forthwith upon, and in any event within two (2) business
days of, receipt by the undersigned, be turned over to Laurus in the exact form
received by the undersigned (duly endorsed by the undersigned to Laurus, if
required), to be applied against the Obligations, whether matured or unmatured,
in such order as Laurus may determine, subject to the provisions of the Note.
Any and all present and future debts and obligations of Company to any of the
undersigned are hereby waived and postponed in favor of, and subordinated to the
full payment and performance of, all present and future debts and obligations of
Company to Laurus.

         4.       Security. All sums at any time to the credit of the
undersigned and any property of the undersigned in Laurus's possession or in the
possession of any bank, financial institution or other entity that directly or
indirectly, through one or more intermediaries, controls or is controlled by, or
is under common control with, Laurus (each such entity, an "Affiliate") shall be
deemed held by Laurus or such Affiliate, as the case may be, as security for any
and all of the undersigned's obligations to Laurus and to any Affiliate of
Laurus, no matter how or when arising and whether under this or any other
instrument, agreement or otherwise.

         5.       Representations and Warranties. The undersigned hereby
represent and warrant to Laurus (all of which representations and warranties (i)
are made as of the date of this

                                        3
<PAGE>

Guaranty, (ii) are supplemented by and subject to the Exchange Act Filings (as
defined in the Securities Purchase Agreement, dated as of the date hereof, by
and between the Company and Laurus (as amended, modified and supplemented from
time to time, the "Securities Purchase Agreement") and the representations and
warranties made in the Securities Purchase Agreement or any schedule thereto and
(iii) shall survive until all Obligations are indefeasibly satisfied in full and
the Note has been irrevocably terminated), that:

                  (a)      Corporate Status. Each of the undersigned is duly
organized, validly existing and in good standing under the laws of its state of
formation as set forth under the undersigned's signature on the signature pages
hereto and has full corporate or other organization power, authority and legal
right to own its property and assets and to transact the business in which it is
engaged.

                  (b)      Authority and Execution. Each of the undersigned has
full corporate or other organizational power, authority and legal right to
execute and deliver, and to perform its obligations under, this Guaranty and has
taken all necessary corporate and legal action to authorize the execution,
delivery and performance of this Guaranty.

                  (c)      Legal, Valid and Binding Character. This Guaranty
constitutes the legal, valid and binding obligation of the undersigned
enforceable in accordance with its terms, except as enforceability may be
limited by applicable Insolvency Law or general principles of equity that
restrict the availability of equitable or legal remedies.

                  (d)      Violations. Except as set forth on Schedule 5(d), the
execution, delivery and performance of this Guaranty will not violate any
requirement of law applicable to the undersigned or any material contract,
agreement or instrument to which any of the undersigned is a party or by which
any of the undersigned or any property of the undersigned is bound or result in
the creation or imposition of any mortgage, lien or other encumbrance other than
to Laurus on any of the property or assets of any of the undersigned pursuant to
the provisions of any of the foregoing.

                  (e)      Consents or Approvals. Except as set forth on
Schedule 5(e), no consent of any other person or entity (including, without
limitation, any creditor of any of the undersigned) and no consent, license,
permit, approval or authorization of, exemption by, notice or report to, or
registration, filing or declaration with, any governmental authority is required
in connection with the execution, delivery, performance, validity or
enforceability of this Guaranty.

                  (f)      Litigation. Except as set forth on Schedule 4.12 to
the Securities Purchase Agreement, no litigation, arbitration, investigation or
administrative proceeding of or before any court, arbitrator or governmental
authority, bureau or agency is currently pending or, to the actual knowledge of
the officers of the undersigned, threatened (i) with respect to this Guaranty or
any of the transactions contemplated by this Guaranty or (ii) against or
affecting any of the undersigned, or any of the property or assets of any of the
undersigned, which, if adversely determined, would have a Material Adverse
Effect (as defined in the Securities Purchase Agreement).

                                        4
<PAGE>

                  (g)      Financial Benefit. The undersigned have derived or
expect to derive a financial or other advantage from each and every loan,
advance or extension of credit made under the Note.

         6.       Acceleration. It shall be an "Event of Default" under this
Guaranty if: (i) any Event of Default shall occur and be continuing under and as
defined in the Note or the Security Agreement after expiration of any notice,
cure, grace or similar period, (ii) any representation or warranty of any of the
undersigned shall have been untrue in any material respect when made, (iii) any
of the undersigned should at any time become insolvent, or make a general
assignment, or if a proceeding in or under any Insolvency Law shall be filed or
commenced by, or in respect of, any of the undersigned, which proceeding, if not
commenced by the undersigned, shall not be dismissed within 60 days of its
filing; (iv) a notice of any lien, levy, or assessment in excess of $100,000 (in
the aggregate outstanding at any time for all of the undersigned on a combined
basis) is filed of record with respect to any assets of any of the undersigned
by the United States of America or any department, agency, or instrumentality
thereof, or (v) the undersigned shall breach in the performance of any
obligation under this Guaranty in any respect. Upon the occurrence of any Event
of Default, any and all Obligations shall for purposes hereof, at Laurus'
option, be deemed due and payable without notice notwithstanding that any such
Obligation is not then due and payable by Company.

         7.       Payments from Guarantor. Laurus, in its sole and absolute
discretion, with or without notice to the undersigned, may apply on account of
the Obligations any payment from the undersigned or any other guarantor, or
amounts realized from any security for the Obligations, or may deposit any and
all such amounts realized in a non-interest bearing cash collateral deposit
account to be maintained as security for the Obligations.

         8.       Costs. The undersigned shall pay on demand, all reasonable out
of pockets costs, fees and expenses (including reasonable expenses for legal
services of every kind) relating to the enforcement or protection of the rights
of Laurus hereunder or under any of the Obligations.

         9.       No Termination. This is a continuing irrevocable guaranty and
shall remain in full force and effect and be binding upon the undersigned, and
the undersigned's successors and assigns, until all of the Obligations then
outstanding on the date on which the Note is paid in full (whether by cash
payment or by conversion of the Note to Common Stock (as defined in the
Securities Purchase Agreement) pursuant to the terms of the Note) are paid in
full, whereupon this Guaranty shall expire and terminate and be of no further
force and effect. If any of the present or future Obligations are guarantied by
persons, partnerships or corporations in addition to the undersigned, the death,
release or discharge in whole or in part or the bankruptcy, merger,
consolidation, incorporation, liquidation or dissolution of one or more of them
shall not discharge or affect the liabilities of the undersigned under this
Guaranty.

         10.      Recapture. Anything in this Guaranty to the contrary
notwithstanding, if Laurus receives any payment or payments on account of the
liabilities guaranteed hereby, which payment or payments or any part thereof are
subsequently invalidated, declared to be fraudulent or preferential, set aside
and/or required to be repaid to a trustee, receiver, or any other party under
any Insolvency Law, common law or equitable doctrine, then to the extent of any
sum not finally retained by Laurus, the undersigned's obligations to Laurus
shall be reinstated and this

                                        5
<PAGE>

Guaranty shall remain in full force and effect (or be reinstated) until payment
shall have been made to Laurus, which payment shall be due on demand.

         11.      No Waiver. No failure on the part of Laurus to exercise, and
no delay in exercising, any right, remedy or power hereunder shall operate as a
waiver thereof, nor shall any single or partial exercise by Laurus of any right,
remedy or power hereunder preclude any other or future exercise of any other
legal right, remedy or power. Each and every right, remedy and power hereby
granted to Laurus or allowed it by law or other agreement shall be cumulative
and not exclusive of any other, and may be exercised by Laurus at any time and
from time to time.

         12.      Waiver of Jury Trial. THE GUARANTOR AND THE INDIVIDUALS
EXECUTING THIS INSTRUMENT ON BEHALF OF THE GUARANTOR DOES HEREBY KNOWINGLY,
VOLUNTARILY AND INTENTIONALLY WAIVE THE RIGHT TO TRIAL BY JURY IN ANY ACTION OR
PROCEEDING BASED ON OR WITH RESPECT TO THIS GUARANTY OR ANY OF THE TRANSACTIONS
CONTEMPLATED HEREBY OR RELATING OR INCIDENTAL HERETO. THE UNDERSIGNED DOES
HEREBY CERTIFY THAT NO REPRESENTATIVE OR AGENT OF LAURUS HAS REPRESENTED,
EXPRESSLY OR OTHERWISE, THAT LAURUS WOULD NOT, IN THE EVENT OF LITIGATION, SEEK
TO ENFORCE THIS WAIVER OF RIGHT TO JURY TRIAL PROVISION.

         13.      Governing Law; Jurisdiction; Amendments. THIS INSTRUMENT SHALL
BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW
YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS. ANY ACTION BROUGHT BY
EITHER PARTY AGAINST THE OTHER CONCERNING THE TRANSACTIONS CONTEMPLATED BY THIS
INSTRUMENT SHALL BE BROUGHT ONLY IN ANY STATE OR FEDERAL COURT SITTING IN THE
BOROUGH OF MANHATTAN, CITY OF NEW YORK; PROVIDED THAT NOTHING CONTAINED IN THIS
INSTRUMENT SHALL BE DEEMED TO PRECLUDE LAURUS FROM BRINGING SUIT OR TAKING OTHER
LEGAL ACTION IN ANY OTHER COURT OF COMPETENT JURISDICTION AND NOTHING SHALL BE
DEEMED TO PRECLUDE THE GUARANTOR FROM ASSERTING ANY DEFENSES OR COUNTERCLAIMS IN
ANY SUCH ACTIONS. THE GUARANTOR AND THE INDIVIDUALS EXECUTING THIS INSTRUMENT ON
BEHALF OF THE GUARANTOR AGREE TO SUBMIT TO THE JURISDICTION OF SUCH COURTS. THE
GUARANTOR AND THE INDIVIDUALS EXECUTING THIS INSTRUMENT FURTHER CONSENT THAT ANY
SUMMONS, SUBPOENA OR OTHER PROCESS OR PAPERS (INCLUDING, WITHOUT LIMITATION, ANY
NOTICE OR MOTION OR OTHER APPLICATION TO EITHER OF THE AFOREMENTIONED COURTS OR
A JUDGE THEREOF) OR ANY NOTICE IN CONNECTION WITH ANY PROCEEDINGS HEREUNDER, MAY
BE SERVED BY REGISTERED OR CERTIFIED MAIL, RETURN RECEIPT REQUESTED, OR BY
PERSONAL SERVICE PROVIDED A REASONABLE TIME FOR APPEARANCE IS PERMITTED, OR IN
SUCH OTHER MANNER AS MAY BE PERMISSIBLE UNDER THE RULES OF SAID COURTS. THE
GUARANTOR AND THE INDIVIDUALS EXECUTING THIS INSTRUMENT WAIVE ANY OBJECTION TO
JURISDICTION AND VENUE OF ANY ACTION INSTITUTED HEREON IN THE SUPREME COURT FOR
THE STATE OF

                                        6
<PAGE>

NEW YORK, COUNTY OF NEW YORK, OR THE UNITED STATES DISTRICT COURT FOR THE
SOUTHERN DISTRICT OF NEW YORK AND SHALL NOT ASSERT ANY DEFENSE BASED ON LACK OF
JURISDICTION OR VENUE OR BASED UPON FORUM NON CONVENIENS FOR ANY ACTION FILED IN
EITHER SUCH COURT. THE PREVAILING PARTY SHALL BE ENTITLED TO RECOVER FROM THE
OTHER PARTY ITS REASONABLE ATTORNEY'S FEES AND COSTS; PROVIDED, HOWEVER, THAT IF
THE PARTIES HERETO AGREE TO SETTLE ANY CLAIM, ACTION, PROCEEDING OR LAWSUIT
BROUGHT BY ONE PARTY HERETO AGAINST THE OTHER PARTY HERETO, THEN EACH OF THE
PARTIES SHALL BEAR ITS OWN COSTS IN CONNECTION WITH SUCH CLAIM, ACTION,
PROCEEDING OR LAWSUIT, UNLESS OTHERWISE DIRECTED BY A COURT OF COMPETENT
JURISDICTION.

         14.      Severability. In the event that any provision of this Guaranty
is invalid or unenforceable under any applicable statute or rule of law, then
such provision shall be deemed inoperative to the extent that it may conflict
therewith and shall be deemed modified to conform with such statute or rule of
law. Any such provision which may prove invalid or unenforceable under any law
shall not affect the validity or unenforceability of any other provision of this
Guaranty.

         15.      Amendments, Waivers. No amendment or waiver of any provision
of this Guaranty nor consent to any departure by the undersigned therefrom shall
in any event be effective unless the same shall be in writing executed by the
undersigned and Laurus.

         16.      Notice. All notices, requests and demands to or upon the
undersigned, shall be in writing and shall be deemed to have been duly given or
made (a) when delivered, if by hand, (b) three (3) days after being sent,
postage prepaid, if by registered or certified mail, (c) when confirmed
electronically, if by facsimile, or (d) when delivered, if by a recognized
overnight delivery service in each event, to the numbers and/or address set
forth beneath the signature of the undersigned, with a copy to: Legal Counsel,
Numerex Corp., 1600 Parkwood Circle SE, Suite 200, Atlanta, Georgia 30339,
facsimile: (770) 693-5951, and Richard Baltz, Esq., Arnold & Porter, 555 12th
Street, N.W., Washington, D.C. 20004, facsimile: (202) 942-5999.

         17.      Successors. Laurus may, from time to time, without notice to
the undersigned, sell, assign, transfer or otherwise dispose of all or any part
of the Obligations and/or rights under this Guaranty to any assignee or
transferee of the Note, but only to the extent such assignment is permitted by
the Note or Securities Purchase Agreement. Without limiting the generality of
the foregoing, Laurus may assign, or grant participations to, one or more banks,
financial institutions or other entities all or any part of any of the
Obligations who are assignees, transferees or participants in a corresponding
portion of the Note. In each such event, Laurus and each and every immediate and
successive purchaser, assignee, transferee or holder of all or any part of the
Obligations shall, acting as a single, unified group, have the right to enforce
this Guaranty, by legal action or otherwise, for their own benefit as fully as
if such purchasers, assignees, transferees or holders were herein by name
specifically given such right; provided, however, that the holders of the
Obligations shall appoint an agent to act on their behalf and shall act and
enforce rights and remedies through a single action.

                                        7
<PAGE>

         18.      Release. Nothing except payment in full of all Obligations
then outstanding on the date all amounts due under the Note are paid in full
(whether by cash payment or by conversion of the Note to Common Stock (as
defined in the Securities Purchase Agreement) pursuant to the terms of the Note)
shall release the undersigned from liability under this Guaranty.

                                        8
<PAGE>

         IN WITNESS WHEREOF, this Guaranty has been executed by the undersigned
this 13th day of January, 2004.

                                     NUMEREX SOLUTIONS, LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   MANAGER
                                         --------------------------------
                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Delaware

                                     CELLEMETRY LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   MANAGER
                                         --------------------------------
                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Delaware

                                     NUMEREX INVESTMENT CORP.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   CEO
                                         --------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Delaware

<PAGE>

                                     BROADBAND NETWORKS INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   CEO
                                         --------------------------------

                                     Address: 2820 E. College Ave. Suite B
                                              State College, PA 16801-7548
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Delaware

                                     BNI SOLUTIONS LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   MANAGER
                                         --------------------------------

                                     Address: 2820 E. College Ave. Suite B
                                              State College, PA 16801-7548
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Delaware

                                     DIGILOG INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   CEO
                                         --------------------------------

                                     Address: 2360 Maryland Road
                                              Willow Grove, PA 19090
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Pennsylvania

                                       10
<PAGE>

                                     DCX SYSTEMS INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   CEO
                                         --------------------------------

                                     Address: 2360 Maryland Road
                                              Willow Grove, PA 19090
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Pennsylvania

                                     DCX SYSTEMS AUSTRALIA PTY LIMITED

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   DIRECTOR
                                         --------------------------------

                                     Address: Lindfield Executive Centre
                                              12 Tryon Rd.
                                              P.O. Box 42
                                              Lindfield, NSW 2072, Australia
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Australia

                                     MOBILEGUARDIAN LLC

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   MANAGER
                                         --------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Delaware

                                     UPLINK SECURITY, INC.

                                     By: /s/ STRATTON J. NICOLAIDES
                                        ---------------------------------
                                     Its:   CEO
                                         --------------------------------

                                     Address: 1600 Parkwood Circle SE, Suite 200
                                              Atlanta, GA 30339
                                     Telephone No.: (770) 485-2527
                                     Facsimile No.: (770) 693-5951

                                     State of Formation: Georgia

                                       11
<PAGE>

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the Manager of Cellemetry, LLC, the limited liability company described in
and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the Manager of Numerex Solutions LLC, the limited liability company described
in and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

<PAGE>

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Numerex Investment Corp., the corporation described in and which
executed the above instrument; and that s/he signed her/his name thereto by
order of the board of directors of said corporation.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of BroadBand Networks Inc., the corporation described in and which
executed the above instrument; and that s/he signed her/his name thereto by
order of the board of directors of said corporation.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the Manager of BNI Solutions LLC, the limited liability company described in
and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

                                       13
<PAGE>

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Digilog Inc., the corporation described in and which executed the
above instrument; and that s/he signed her/his name thereto by order of the
board of directors of said corporation.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of DCX Systems Inc., the corporation described in and which executed
the above instrument; and that s/he signed her/his name thereto by order of the
board of directors of said corporation.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the Director of DCX Systems Australia PTY Limited, the ______________
described in and which executed the above instrument; and that s/he signed
her/his name thereto by order of the board of directors of said
__________________.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the Manager of MobileGuardian LLC, the limited liability company described in
and which executed the above instrument; and that s/he signed her/his name
thereto by order of the board of directors of said limited liability company.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

                                       14
<PAGE>

STATE OF Georgia )
     : ss.:
COUNTY OF Cobb )

         On the 13th day of January, 2004, before me personally came Stratton J.
Nicolaides to me known, who, being by me duly sworn did depose and say that s/he
is the CEO of Uplink Security, Inc., the corporation described in and which
executed the above instrument; and that s/he signed her/his name thereto by
order of the board of directors of said corporation.

                                     /s/ Pamela S. Lester
                                     -------------------------------
                                     Notary Public

                                       15

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00060-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00060-of-00352.parquet"}]]