EXHIBIT 10.27

                             220-222 MHz SMR SYSTEM
                    PURCHASE AND LICENSE ASSIGNMENT AGREEMENT

     This 220-222 MHz Systems  Purchase and License  Assignment  Agreement  (the
"Agreement")  is entered into between Digi Link  Technologies,  Inc., a Delaware
corporation   ("Purchaser"),   and  Communications  Concepts,  Inc.,  a  Florida
corporation  (hereafter  "Seller"),  to be effective as of January 21, 2001 (the
"Agreement").

     WHEREAS, Purchaser is engaged in the ownership,  development and management
of 220 MHz SMR licenses; and

     WHEREAS,  Seller  desires to sell to Purchaser,  and  Purchaser  desires to
purchase from Seller,  each in accordance  with the terms and conditions of this
Agreement,  all of Seller's  right,  title and interest in and to various mobile
communications  radio  systems and  licenses  operating or to be operated in the
220-222 MHZ band (the  "Systems"),  which Systems are evidenced by, and operated
or to be operated  pursuant to, an authorization  (the "License")  issued by the
Federal  Communications  Commission (the "FCC"),  and which Systems and Licenses
are  further  described  in  Exhibit A  attached  hereto and made a part of this
Agreement.

     NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and  terms
contained herein, and for other valuable consideration,  receipt and sufficiency
of which is hereby mutually  acknowledged,  the Parties hereto,  intending to be
legally bound, agree as follows:

     1. Sale and Purchase.

     1.1  Systems  and  Licenses.  Subject to the terms and  conditions  of this
Agreement,  Seller agrees to sell, and Purchaser agrees to purchase,  subject to
prior FCC  approval,  all of Seller's  right,  title and  interest in and to all
tangible  and  intangible  assets (the  "Assets")  used in  connection  with the
Systems  and the  Licenses  including,  without  limitation,  assignment  of the
License,  License  files and records,  customer  lists and  records,  contracts,
leases  and other  agreements,  and  other  assets  owned by Seller  and used in
connection with the operation of the Systems and/or the Licenses existing on the
date of execution of this Agreement:

       (a) Tycom Dispatch Systems, L.C. with SMR systems in Dallas and
           Jacksonville;

       (b) SMR Acquisition L.C. with two SMR Systems in Los Angeles, California;

       (c) Comnet Dispatch with SMR System in Los Angeles;

       (d) Bottom Line Dispatch L.C. with SMR System in Chicago; and

       (e) License Pool 3, L.C., Milwaukee.

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     1.2 Purchase  Price.  Purchaser  agrees to pay Seller the amounts  detailed
immediately below for the Systems / Licenses:

       Systems / Licenses                              Purchase Price

       (a) Tycom Dispatch Systems, L.C.
           with SMR systems
           in Dallas and Jacksonville;                   $600,000.00

       (b) SMR Acquisition L.C.
           with SMR Systems
           in Los Angeles and Long Beach;                $600,000.00

       (c) Comnet Dispatch
           with SMR System
           in Los Angeles;                               $600,000.00

       (d) Bottom Line Dispatch L.C.
           with SMR System
           in Chicago; and                               $600,000.00

           Total (a) through (d)                       $2,400,000.00

       (e) License Pool 3, L.C.,
           Milwaukee.                                    $840,000.00

     Purchaser  agrees to pay Seller  $3,240,000,  which purchase price shall be
paid in the form of: (i)  3,240,000  shares of  restricted  common stock of Digi
Link  with an  agreed  to  value  of  $1.00  per  share  or (ii) if  there is an
established public trading market for Digi Link stock at the time the conditions
set forth in 1.3(c) are met, then the purchase price of $3,240,000 shall be paid
in Digi Link restricted  common stock at a rate equal to the last closing bid on
the OTC Bulletin Board or in the over-the-counter  market on the date before the
satisfaction  of the last condition set forth in  subparagraph  1.3c(i) and (ii)
below.   By way of  illustration,  if Digi Link stock is trading at $2.00 bid on
the date the conditions are met, then the number of shares to be issued shall be
1.62 million shares.

     1.3 Closing.  The purchase and sale of the License shall be  consummated in
the manner  described in this Section 1.3. Upon the signing of this Agreement by
Seller and Purchaser, the following shall occur immediately thereafter:

     (a) Seller shall  deliver to Purchaser  written  confirmation,  in form and
substance reasonably  satisfactory to Purchaser,  that Seller has applied to the
FCC for the transfer of the License to Purchaser as described herein,  including
photocopies of all correspondence and documents  exchanged by Seller and the FCC
regarding the License.

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     (b)  Purchaser  shall  prepare  to  deliver  to Seller a stock  certificate
representing  the shares of Common Stock to be delivered as part of the Purchase
Price.

     (c) Closing is  conditioned  upon the later of: (i) final FCC approval;  or
(ii)  satisfactory  valuation of the assets being transferred by the auditors of
Digi Link,  Brignola & Co., CPA's. At such time as all of the License  transfers
from Seller to Purchaser are approved by the FCC,  Seller shall cause the Common
Stock  certificates  to be delivered to Purchaser in accordance with the formula
set forth in Section 1.2 above.

     Closing is  conditioned  upon final  approval by the Board of  Directors of
Purchaser and Seller and satisfactory completion of due diligence by Purchaser.

     1.4 FCC Rules; Management Agreement.  Purchaser and Seller each acknowledge
that it is familiar  with the  responsibilities  of the licensee  under  federal
licenses  of  220-222  MHz   specialized   mobile   radio   systems   under  the
Communications  Act of 1934, as amended,  and applicable FCC rules and policies.
In order to comply with applicable laws, rules and policies,  the Parties agree
to enter into the  220-222  MHz System  Management  Agreement  (the  "Management
Agreement") in the form attached to and made a part of this Agreement as Exhibit
B. The  Management  Agreement  shall be effective as of its  execution  date and
shall  continue in full force and effect  until such time that the FCC  approves
the transfer of the License as contemplated by this Agreement.  Seller shall pay
to Purchaser the compensation set forth in the Management Agreement according to
the terms and conditions set forth in the Management Agreement.

     1.5 Specific Performance. If Purchaser fails to make payment as required in
this  Agreement or Seller fails to cause transfer of the License to Purchaser to
be  approved  by the  FCC,  each  of the  Parties  agrees  that  the  respective
obligations of the Parties may be specifically enforced.

     2. Representations of Seller. Seller represents, warrants and agrees to and
with Purchaser as follows as of the Effective Date and as of each Closing Date:

     (a) Seller is the sole beneficial, legal and record licensee of the
         License;

     (b) Seller has full power, authority and legal right to transfer the
         License;

     (c) Other than restrictions  imposed by the FCC in the ordinary course of
         business, there are no claims, liens or other encumbrances on the
         License;

     (d) This  Agreement constitutes a legal and binding obligation of the
         Seller, and is valid and enforceable against the Seller and Seller's
         successors in accordance with its terms;

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     (e) Seller has had the opportunity to discuss Seller's acquisition of the
         Common Stock pursuant to this Agreement and Seller has obtained or been
         given access to all information concerning Purchaser  that  Seller  has
         reasonably requested, including all filings made by Purchaser's parent,
         Greenleaf Technologies Corporation, with the U.S. Securities and
         Exchange Commission and the Purchaser's Private Placement Memorandum
         dated as of September 25, 2000; and [PJJ: Do you want to reference new
         PPM as in ABC??]

     (f) There are no other restrictions on Seller's right or ability to
         transfer the License to Purchaser.

     3. Representations of Purchaser. Purchaser hereby represents,  warrants and
agrees to and with Seller as follows:

     (a) Purchaser has full power, authority and legal right to acquire the
         License from Seller, and the entering into of this Agreement by
         Purchaser does not require the consent of, or notice to, any party not
         previously obtained or given; and

     (b) This Agreement constitutes a legal and binding obligation of Purchaser,
         and is valid and enforceable against Purchaser and Purchaser's
         successors in accordance with its terms.

     4. Additional Covenants.

     4.1 Brokerage  Commissions and Finders' Fees. Purchaser shall indemnify and
hold harmless Seller from any loss, cost or expense arising out of any claim for
brokerage commissions,  finders' fees or other like payment with respect to this
Agreement or other transfer of the System or license if such claim is based upon
any  agreement  or   understanding   with   Purchaser  or  any  of   Purchaser's
representatives  or agents.  Seller shall indemnify and hold harmless  Purchaser
from any loss, cost or expense arising out of a claim for brokerage commissions,
finders'  fees or other like  payment  with  respect to this  Agreement or other
transfer of the System or License if such claim is based upon any  agreement  or
understanding with Seller or any of Seller's representatives or agents.

     4.2 Expenses.  Each respective  Party will pay all expenses and fees of his
or its  legal  counsel,  accountants  and other  agents  and  advisers  incurred
pursuant to this Agreement  regardless of whether the transactions  contemplated
in this Agreement are consummated.

     5. Miscellaneous.

     5.1 Entire  Agreement.  This  Agreement  constitutes  the entire  agreement
between the Parties with respect to the subject matter hereof.

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     5.2  Notice.  All  notices,   requests,   demands,   directions  and  other
communications  ("Notices")  provided for in this Agreement  shall be in writing
and shall be mailed or delivered  personally  or sent by telecopier or facsimile
to the  applicable  Party at the  address of such Party set forth  below in this
Section  5.2.  When  mailed,  each  such  Notice  shall be sent by first  class,
certified mail, return receipt requested, enclosed in a postage prepaid wrapper,
and shall be effective on the third  business day after it has been deposited in
the mail.  When delivered  personally,  each such Notice shall be effective when
delivered to the address for the respective Party set forth in this Section 5.2.
When sent by telecopier or facsimile, each such Notice shall be effective on the
first business day on which or after which it is sent. Each such Notice shall be
addressed to the Party to be notified as shown below:

                  Purchaser:        Digi Link Technologies, Inc.
                                    75 Highway 27, Suite 201
                                    Iselin, New Jersey 08830
                                    Attn: Peter J. Jegou, Chairman and CEO
                                    Facsimile No.: (732) 603-6005

                  Seller:           Communications Concepts, Inc.
                                    5440 N.W. 33rd Avenue, Suite 104
                                    Ft. Lauderdale, Florida 33304
                                    Attn: William Gale
                                    Facsimile No.: (954) 497-1129

     Either party may change its respective address for purposes of this Section
5.2 by giving the other Party  Notice of the new address in the manner set forth
above.

     5.3 Severability. Whenever possible, each provision of this Agreement shall
be  interpreted  in such a manner as to be effective and valid under  applicable
law, and if any  provision of this  Agreement  shall be or become  prohibited or
invalid in whole or in part for any reason  whatsoever,  that provision shall be
ineffective  only  to the  extent  of such  prohibition  or  invalidity  without
invalidating the remaining portion of that provision or the remaining provisions
of this Agreement.

     5.4  Non-Waiver.  The waiver by either  Party of a breach or a violation of
any provision of this Agreement shall not operate or be construed as a waiver of
any subsequent breach or violation of any provision of this Agreement.

     5.5 Amendment.  No amendment or  modification  of this  Agreement  shall be
deemed effective unless and until it has been executed in writing by the Parties
to this  Agreement.  No term or condition of this  Agreement  shall be deemed to
have been waived,  nor shall there be any  estoppel to enforce any  provision of
this  Agreement,  except by a written  instrument  that has been executed by the
Party charged with such waiver or estoppel.

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     5.6 Inurement.  This  Agreement  shall be binding upon each of the Parties,
and it shall  benefit each of the Parties and their  respective  successors  and
assigns.  This Agreement  shall not be assignable by either Party.  There are no
third party beneficiaries to this Agreement.

     5.7 Headings. The headings to this Agreement are for convenience only; they
form no part of this Agreement and shall not affect its interpretation.

     5.8   Counterparts.   This  Agreement  may  be  executed  in  one  or  more
counterparts, all of which taken together shall constitute a single instrument.

     5.9 Survival of Representations and Warranties.  Each covenant,  agreement,
representation  and warranty of the parties under this  Agreement  shall survive
for the  execution of this  Agreement  and the  performance  of each  respective
Party's obligations pursuant to this Agreement.

     IN WITNESS WHEREOF, this Agreement is executed on the dates set forth below
to be effective as of the Effective Date.


Date:                                      DIGI LINK TECHNOLOGIES, INC.



                                           By:  /s/: Peter J. Jegou
                                           ------------------------
                                           Name:  Peter J. Jegou
                                           Title:  Chairman/CEO



Date:                                      COMMUNICATIONS CONCEPTS, INC.



                                           By:   /s/: William Gale
                                           -----------------------
                                           Name: William Gale
                                           Title:  President



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