EXHIBIT 10.20
                                  -------------

                     INVESTOR REGISTRATION RIGHTS AGREEMENT
                     --------------------------------------

      THIS INVESTOR  REGISTRATION RIGHTS AGREEMENT (this "AGREEMENT"),  dated as
of November 22, 2002, by and among ADVANCED COMMUNICATIONS TECHNOLOGIES, INC., a
Florida corporation,  with its principal office located at 420 Lexington Avenue,
Suite  2739,  New York,  New York 10170  (the  "COMPANY"),  and the  undersigned
investors (each, an "INVESTOR" and collectively, the "INVESTORS").

      WHEREAS:

      A.   In connection with the Securities Purchase Agreement by and among the
parties hereto of even date herewith (the "SECURITIES PURCHASE AGREEMENT"),  the
Company  has  agreed,  upon the  terms  and  subject  to the  conditions  of the
Securities  Purchase  Agreement,  to  issue  and sell to the  Investors  secured
convertible  debentures (the "SECURED  CONVERTIBLE  DEBENTURES")  which shall be
convertible  into that number of shares of the Company's  common  stock,  no par
value per share (the "COMMON  STOCK"),  pursuant to the terms of the  Securities
Purchase  Agreement for an aggregate  purchase  price of up to Two Hundred Fifty
Thousand Dollars ($250,000). Capitalized terms not defined herein shall have the
meaning ascribed to them in the Securities Purchase Agreement.

      B.   To induce  the  Investors  to  execute  and  deliver  the  Securities
Purchase  Agreement,  the  Company  has agreed to provide  certain  registration
rights  under  the  Securities  Act of  1933,  as  amended,  and the  rules  and
regulations  there under, or any similar successor  statute  (collectively,  the
"1933 ACT"), and applicable state securities laws.

      NOW, THEREFORE,  in consideration of the premises and the mutual covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency  of which are hereby  acknowledged,  the Company  and the  Investors
hereby agree as follows:

           1.   DEFINITIONS.
                -----------

      As used in this  Agreement,  the following  terms shall have the following
meanings:

           (a)  "INVESTOR"  means an  Investor  and any  transferee  or assignee
thereof to whom an Investor  assigns  its rights  under this  Agreement  and who
agrees to become bound by the  provisions of this  Agreement in accordance  with
Section 9 hereof.

           (b)  "PERSON" means a corporation,  a limited liability  company,  an
association,  a partnership,  an  organization,  a business,  an  individual,  a
governmental or political subdivision thereof or a governmental agency.

           (c)  "REGISTER,"   "REGISTERED,"  and   "REGISTRATION"   refer  to  a
registration   effected  by  preparing  and  filing  one  or  more  Registration
Statements  (as defined  below) in compliance  with the 1933 Act and pursuant to
Rule 415  under  the 1933  Act or any  successor  rule  providing  for  offering
securities on a continuous or delayed basis ("RULE 415"), and the declaration or



<PAGE>

ordering of effectiveness of such Registration Statement(s) by the United States
Securities and Exchange SEC (the "SEC").

           (d)  "REGISTRABLE  SECURITIES"  means  the  shares  of  Common  Stock
issuable to Investors  upon  conversion  of the Secured  Convertible  Debentures
pursuant to the Securities Purchase Agreement.

           (e)  "REGISTRATION  STATEMENT"  means a registration  statement under
the 1933 Act which covers the Registrable Securities.

      2.   REGISTRATION.
           ------------

           (a)  Subject  to the  terms and  conditions  of this  Agreement,  the
Company shall prepare and file, no later than one hundred eighty (180) days from
the date hereof (the "SCHEDULED FILING  DEADLINE"),  with the SEC a registration
statement on Form S-1 or SB-2 (or, if the Company is then eligible, on Form S-3)
under the 1933 Act (the "INITIAL  REGISTRATION  STATEMENT") for the registration
for the resale by all  Investors who purchased  Secured  Convertible  Debentures
pursuant  to the  Securities  Purchase  Agreement  shares of Common  Stock to be
issued upon conversion of the Secured Convertible  Debentures issued pursuant to
the  Securities  Purchase  Agreement.  The Company shall cause the  Registration
Statement to remain effective until all of the Registrable  Securities have been
sold.  Prior to the  filing  of the  Registration  Statement  with the SEC,  the
Company  shall  furnish  a copy of the  Initial  Registration  Statement  to the
Investors,  and Butler Gonzalez, LLP for their review and comment. The Investors
and Butler  Gonzalez  LLP shall  furnish  comments on the  Initial  Registration
Statement to the Company within  twenty-four  (24) hours of the receipt  thereof
from the Company.

           (b)  EFFECTIVENESS OF THE INITIAL REGISTRATION STATEMENT. The Company
shall  use its best  efforts  (i) to have  the  Initial  Registration  Statement
declared effective by the SEC no later than two hundred seventy (270) days after
the date hereof (the "Scheduled Effective Deadline") and (ii) to insure that the
Initial Registration Statement and any subsequent Registration Statement remains
in effect until all of the Registrable Securities have been sold, subject to the
terms and conditions of this Agreement.

           (c)  FAILURE  TO FILE OR  OBTAIN  EFFECTIVENESS  OF THE  REGISTRATION
STATEMENT. In the event the Registration Statement is not filed by the Scheduled
Filing  Deadline  or is not  declared  effective  by the  SEC on or  before  the
Scheduled  Effective  Date,  or if after  the  Registration  Statement  has been
declared effective by the SEC, sales cannot be made pursuant to the Registration
Statement  (whether  because  of a failure  to keep the  Registration  Statement
effective,  failure to disclose such information as is necessary for sales to be
made  pursuant to the  Registration  Statement,  failure to register  sufficient
shares of Common  Stock or otherwise  then as partial  relief for the damages to
any holder of Registrable Securities by reason of any such delay in or reduction
of its ability to sell the underlying shares of Common Stock (which remedy shall
not be  exclusive of any other  remedies at law or in equity),  the Company will
pay as liquidated damages (the "LIQUIDATED DAMAGES") to the holder a cash amount
within three (3) business  days,  after demand  therefore,  equal to two percent
(2%) of the liquidated value of the Secured Convertible  Debentures  outstanding


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as Liquidated Damages for each thirty (30) day period after the Scheduled Filing
Deadline or the Scheduled Effective Date as the case may be.

           (d)  LIQUIDATED   DAMAGES.   The  Company  and  the  Investor  hereto
acknowledge  and agree that the sums payable under  subsection  2(c) above shall
constitute liquidated damages and not penalties. The parties further acknowledge
that (i) the amount of loss or damages  likely to be incurred is incapable or is
difficult to precisely estimate,  (ii) the amounts specified in such subsections
bear  a   reasonable   relationship   to,   and  are  not   plainly  or  grossly
disproportionate  to the probable loss likely to be incurred in connection  with
any  failure  by the  Company  to  obtain or  maintain  the  effectiveness  of a
Registration  Statement,  (iii)  one of the  reasons  for  the  Company  and the
Investor  reaching an agreement as to such amounts was the  uncertainty and cost
of litigation regarding the question of actual damages, and (iv) the Company and
the Investor are  sophisticated  business  parties and have been  represented by
sophisticated  and able legal  counsel and  negotiated  this  Agreement at arm's
length.

           3.   RELATED OBLIGATIONS.
                -------------------

           (a)  The  Company  shall keep the  Registration  Statement  effective
pursuant  to Rule 415 at all times  until the date on which the  Investor  shall
have sold all the Registrable  Securities covered by such Registration Statement
(the  "REGISTRATION  PERIOD"),   which  Registration  Statement  (including  any
amendments or supplements thereto and prospectuses  contained therein) shall not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated therein,  or necessary to make the statements  therein, in
light of the circumstances in which they were made, not misleading.

           (b)  The Company shall prepare and file with the SEC such  amendments
(including   post-effective   amendments)  and  supplements  to  a  Registration
Statement  and  the  prospectus  used  in  connection  with  such   Registration
Statement,  which  prospectus  is to be filed  pursuant to Rule 424  promulgated
under the 1933 Act,  as may be  necessary  to keep such  Registration  Statement
effective at all times during the Registration  Period, and, during such period,
comply with the  provisions of the 1933 Act with respect to the  disposition  of
all Registrable Securities of the Company covered by such Registration Statement
until such time as all of such  Registrable  Securities shall have been disposed
of in  accordance  with the  intended  methods of  disposition  by the seller or
sellers  thereof  as set forth in such  Registration  Statement.  In the case of
amendments and supplements to a Registration  Statement which are required to be
filed  pursuant to this Agreement  (including  pursuant to this Section 3(b)) by
reason of the Company's filing a report on Form 10-KSB,  Form 10-QSB or Form 8-K
or any analogous  report under the  Securities  Exchange Act of 1934, as amended
(the "1934 ACT"),  the Company shall  incorporate  such report by reference into
the  Registration  Statement,  if applicable,  or shall file such  amendments or
supplements  with the SEC on the same day on which the 1934 Act  report is filed
which  created  the  requirement  for the  Company  to amend or  supplement  the
Registration Statement.

           (c)  The Company  shall furnish to each  Investor  whose  Registrable
Securities are included in any Registration  Statement,  without charge,  (i) at
least one (1) copy of such Registration  Statement as declared  effective by the
SEC and any amendment(s) thereto,  including financial statements and schedules,
all  documents  incorporated  therein  by  reference,   all  exhibits  and  each


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preliminary prospectus, (ii) ten (10) copies of the final prospectus included in
such Registration  Statement and all amendments and supplements thereto (or such
other number of copies as such Investor may  reasonably  request) and (iii) such
other  documents as such  Investor may  reasonably  request from time to time in
order to facilitate the disposition of the Registrable  Securities owned by such
Investor.

           (d)  The  Company  shall use its best  efforts  to (i)  register  and
qualify the  Registrable  Securities  covered by a Registration  Statement under
such other  securities  or "blue sky" laws of such  jurisdictions  in the United
States as any  Investor  reasonably  requests,  (ii)  prepare  and file in those
jurisdictions,   such  amendments  (including  post-effective   amendments)  and
supplements  to such  registrations  and  qualifications  as may be necessary to
maintain the effectiveness  thereof during the Registration  Period,  (iii) take
such other  actions as may be  necessary  to  maintain  such  registrations  and
qualifications in effect at all times during the Registration  Period,  and (iv)
take all  other  actions  reasonably  necessary  or  advisable  to  qualify  the
Registrable Securities for sale in such jurisdictions;  provided,  however, that
the  Company  shall not be required in  connection  therewith  or as a condition
thereto to (w) make any change to its articles of incorporation or by-laws,  (x)
qualify to do  business  in any  jurisdiction  where it would not  otherwise  be
required to qualify but for this  Section  3(d),  (y) subject  itself to general
taxation in any such  jurisdiction,  or (z) file a general consent to service of
process  in any such  jurisdiction.  The  Company  shall  promptly  notify  each
Investor who holds  Registrable  Securities of the receipt by the Company of any
notification with respect to the suspension of the registration or qualification
of any of the Registrable Securities for sale under the securities or "blue sky"
laws of any jurisdiction in the United States or its receipt of actual notice of
the initiation or threat of any proceeding for such purpose.

           (e)  As promptly as practicable after becoming aware of such event or
development,  the Company shall notify each Investor in writing of the happening
of any event as a result  of which the  prospectus  included  in a  Registration
Statement, as then in effect, includes an untrue statement of a material fact or
omission to state a material fact required to be stated  therein or necessary to
make the statements therein, in light of the circumstances under which they were
made,  not  misleading  (provided that in no event shall such notice contain any
material, nonpublic information), and promptly prepare a supplement or amendment
to such Registration Statement to correct such untrue statement or omission, and
deliver ten (10) copies of such  supplement or amendment to each  Investor.  The
Company  shall  also  promptly  notify  each  Investor  in  writing  (i)  when a
prospectus or any  prospectus  supplement or  post-effective  amendment has been
filed,  and when a Registration  Statement or any  post-effective  amendment has
become effective  (notification of such effectiveness shall be delivered to each
Investor  by  facsimile  on the  same  day of such  effectiveness),  (ii) of any
request by the SEC for amendments or supplements to a Registration  Statement or
related prospectus or related information, and (iii) of the Company's reasonable
determination that a post-effective  amendment to a Registration Statement would
be appropriate.

           (f)  The Company  shall use its best  efforts to prevent the issuance
of any  stop  order or  other  suspension  of  effectiveness  of a  Registration
Statement,  or the  suspension of the  qualification  of any of the  Registrable
Securities for sale in any jurisdiction within the United States of America and,
if such an order or suspension is issued, to obtain the withdrawal of such order
or  suspension at the earliest  possible  moment and to notify each Investor who


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holds  Registrable  Securities  being sold of the issuance of such order and the
resolution  thereof or its receipt of actual notice of the  initiation or threat
of any proceeding for such purpose.

           (g)  At the  reasonable  request of any  Investor,  the Company shall
furnish to such Investor,  on the date of the  effectiveness of the Registration
Statement  and  thereafter  from time to time on such dates as an  Investor  may
reasonably request (i) a letter, dated such date, from the Company's independent
certified  public  accountants in form and substance as is customarily  given by
independent  certified  public  accountants to  underwriters  in an underwritten
public  offering,  and  (ii) an  opinion,  dated  as of such  date,  of  counsel
representing the Company for purposes of such Registration  Statement,  in form,
scope and substance as is customarily given in an underwritten  public offering,
addressed to the Investors.

           (h)  The  Company  shall make  available  for  inspection  by (i) any
Investor and (ii) one (1) firm of  accountants  or other agents  retained by the
Investors  (collectively,  the "INSPECTORS")  all pertinent  financial and other
records,  and  pertinent  corporate  documents  and  properties  of the  Company
(collectively,  the "Records"),  as shall be reasonably deemed necessary by each
Inspector,  and cause the Company's officers,  directors and employees to supply
all information which any Inspector may reasonably request;  provided,  however,
that each Inspector  shall agree,  and each Investor  hereby agrees,  to hold in
strict  confidence and shall not make any disclosure  (except to an Investor) or
use any Record or other information  which the Company  determines in good faith
to be confidential,  and of which  determination the Inspectors are so notified,
unless (a) the  disclosure  of such  Records is  necessary to avoid or correct a
misstatement or omission in any Registration  Statement or is otherwise required
under the 1933 Act,  (b) the  release of such  Records is ordered  pursuant to a
final,  non-appealable  subpoena  or order  from a court or  government  body of
competent  jurisdiction,  or (c) the  information  in such Records has been made
generally  available to the public other than by disclosure in violation of this
or any other  agreement of which the Inspector  and the Investor has  knowledge.
Each  Investor  agrees that it shall,  upon  learning  that  disclosure  of such
Records  is  sought  in  or  by  a  court  or  governmental  body  of  competent
jurisdiction or through other means, give prompt notice to the Company and allow
the  Company,  at its  expense,  to  undertake  appropriate  action  to  prevent
disclosure  of,  or to  obtain  a  protective  order  for,  the  Records  deemed
confidential.

           (i)  The Company shall hold in confidence and not make any disclosure
of  information  concerning  an  Investor  provided  to the  Company  unless (i)
disclosure  of such  information  is  necessary  to comply with federal or state
securities  laws, (ii) the disclosure of such  information is necessary to avoid
or correct a misstatement or omission in any Registration  Statement,  (iii) the
release of such  information  is ordered  pursuant to a subpoena or other final,
non-appealable   order  from  a  court  or   governmental   body  of   competent
jurisdiction,  or (iv) such information has been made generally available to the
public other than by  disclosure  in  violation  of this  Agreement or any other
agreement.  The Company agrees that it shall,  upon learning that  disclosure of
such  information  concerning  an  Investor  is  sought  in  or  by a  court  or
governmental body of competent  jurisdiction or through other means, give prompt
written  notice to such  Investor  and allow such  Investor,  at the  Investor's
expense, to undertake  appropriate action to prevent disclosure of, or to obtain
a protective order for, such information.

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<PAGE>

           (j)  The Company  shall use its best efforts  either to cause all the
Registrable  Securities  covered by a  Registration  Statement  to be listed and
included for quotation on the National  Association of Securities Dealers,  Inc.
OTC Bulletin Board for such  Registrable  Securities.  The Company shall pay all
fees and  expenses in  connection  with  satisfying  its  obligation  under this
Section 3(j).

           (k)  The  Company  shall   cooperate  with  the  Investors  who  hold
Registrable  Securities  being  offered  and,  to  the  extent  applicable,   to
facilitate the timely  preparation and delivery of certificates (not bearing any
restrictive  legend)  representing  the  Registrable  Securities  to be  offered
pursuant to a Registration  Statement and enable such certificates to be in such
denominations  or amounts,  as the case may be, as the Investors may  reasonably
request and registered in such names as the Investors may request.

           (l)  The Company shall use its best efforts to cause the  Registrable
Securities  covered by the  applicable  Registration  Statement to be registered
with or approved by such other  governmental  agencies or  authorities as may be
necessary to consummate the disposition of such Registrable Securities.

           (m)  The  Company  shall make  generally  available  to its  security
holders  as soon as  practical,  but not later than  ninety  (90) days after the
close of the period covered  thereby,  an earnings  statement (in form complying
with the provisions of Rule 158 under the 1933 Act) covering a twelve (12) month
period  beginning not later than the first day of the Company's  fiscal  quarter
next following the effective date of the Registration Statement.

           (n)  The Company shall  otherwise use its best efforts to comply with
all  applicable  rules  and  regulations  of the  SEC  in  connection  with  any
registration hereunder.

           (o)  Within  two (2)  business  days after a  Registration  Statement
which  covers  Registrable  Securities  is declared  effective  by the SEC,  the
Company shall deliver, and shall cause legal counsel for the Company to deliver,
to the  transfer  agent  for such  Registrable  Securities  (with  copies to the
Investors  whose  Registrable  Securities  are  included  in  such  Registration
Statement)  confirmation  that such  Registration  Statement  has been  declared
effective by the SEC in the form attached hereto as EXHIBIT A.

           (p)  The Company shall take all other reasonable actions necessary to
expedite and facilitate  disposition by the Investors of Registrable  Securities
pursuant to a Registration Statement.

           4.   OBLIGATIONS OF THE INVESTORS.
                -----------------------------

      Each Investor  agrees that, upon receipt of any notice from the Company of
the  happening  of any event of the kind  described in Section 3(f) or the first
sentence of 3(e),  such Investor will  immediately  discontinue  disposition  of
Registrable  Securities pursuant to any Registration  Statement(s) covering such
Registrable  Securities  until  such  Investor's  receipt  of the  copies of the
supplemented  or amended  prospectus  contemplated by Section 3(e) or receipt of
notice that no supplement or amendment is required.  Notwithstanding anything to
the contrary,  the Company shall cause its transfer agent to deliver  unlegended
certificates  for  shares of Common  Stock to a  transferee  of an  Investor  in


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accordance  with the terms of the  Securities  Purchase  Agreement in connection
with any sale of  Registrable  Securities  with respect to which an Investor has
entered  into a contract  for sale prior to the  Investor's  receipt of a notice
from the Company of the happening of any event of the kind  described in Section
3(f) or the  first  sentence  of 3(e) and for  which  the  Investor  has not yet
settled.

           5.   EXPENSES OF REGISTRATION.
                ------------------------

      All  expenses  incurred  in  connection  with  registrations,  filings  or
qualifications pursuant to Sections 2 and 3, including,  without limitation, all
registration,  listing and qualifications fees,  printers,  legal and accounting
fees shall be paid by the Company.

           6.   INDEMNIFICATION.
                ---------------

      With  respect  to   Registrable   Securities   which  are  included  in  a
Registration Statement under this Agreement:

           (a)  To the fullest  extent  permitted by law, the Company will,  and
hereby does, indemnify,  hold harmless and defend each Investor,  the directors,
officers, partners,  employees, agents,  representatives of, and each Person, if
any, who  controls  any Investor  within the meaning of the 1933 Act or the 1934
Act (each,  an  "INDEMNIFIED  PERSON"),  against  any losses,  claims,  damages,
liabilities,  judgments, fines, penalties, charges, costs, reasonable attorneys'
fees,  amounts paid in settlement or expenses,  joint or several  (collectively,
"CLAIMS") incurred in investigating,  preparing or defending any action,  claim,
suit, inquiry,  proceeding,  investigation or appeal taken from the foregoing by
or before any court or governmental,  administrative or other regulatory agency,
body or the SEC,  whether  pending or threatened,  whether or not an indemnified
party is or may be a party thereto ("INDEMNIFIED DAMAGES"), to which any of them
may become subject  insofar as such Claims (or actions or  proceedings,  whether
commenced or threatened, in respect thereof) arise out of or are based upon: (i)
any  untrue  statement  or alleged  untrue  statement  of a  material  fact in a
Registration Statement or any post-effective  amendment thereto or in any filing
made in connection with the  qualification  of the offering under the securities
or other "blue sky" laws of any jurisdiction in which Registrable Securities are
offered  ("BLUE SKY  FILING"),  or the  omission or alleged  omission to state a
material fact required to be stated  therein or necessary to make the statements
therein not misleading; (ii) any untrue statement or alleged untrue statement of
a material fact contained in any final  prospectus (as amended or  supplemented,
if the Company files any amendment  thereof or supplement  thereto with the SEC)
or the omission or alleged omission to state therein any material fact necessary
to make the statements made therein,  in light of the circumstances  under which
the  statements  therein were made,  not  misleading;  or (iii) any violation or
alleged  violation  by the Company of the 1933 Act, the 1934 Act, any other law,
including,  without  limitation,  any  state  securities  law,  or any  rule  or
regulation  there  under  relating  to the  offer  or  sale  of the  Registrable
Securities  pursuant to a  Registration  Statement (the matters in the foregoing
clauses (i) through (iii) being, collectively,  "VIOLATIONS"). The Company shall
reimburse  the  Investors  and each such  controlling  person  promptly  as such
expenses  are  incurred  and  are  due  and  payable,  for  any  legal  fees  or
disbursements or other reasonable  expenses  incurred by them in connection with
investigating  or  defending  any such  Claim.  Notwithstanding  anything to the
contrary  contained  herein,  the  indemnification  agreement  contained in this
Section 6(a):  (x) shall not apply to a Claim by an  Indemnified  Person arising
out of or based upon a Violation which occurs in reliance upon and in conformity


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with information  furnished in writing to the Company by such Indemnified Person
expressly  for  use in  connection  with  the  preparation  of the  Registration
Statement or any such amendment thereof or supplement thereto;  (y) shall not be
available  to the extent  such Claim is based on a failure  of the  Investor  to
deliver  or to  cause to be  delivered  the  prospectus  made  available  by the
Company, if such prospectus was timely made available by the Company pursuant to
Section 3(c); and (z) shall not apply to amounts paid in settlement of any Claim
if such settlement is effected without the prior written consent of the Company,
which consent shall not be unreasonably withheld. Such indemnity shall remain in
full force and effect  regardless of any  investigation  made by or on behalf of
the  Indemnified  Person  and shall  survive  the  transfer  of the  Registrable
Securities by the Investors pursuant to Section 9 hereof.

          (b)   In  connection  with a  Registration  Statement,  each  Investor
agrees to severally and not jointly indemnify,  hold harmless and defend, to the
same extent and in the same manner as is set forth in Section 6(a), the Company,
each of its  directors,  each of its officers,  employees,  representatives,  or
agents and each Person,  if any, who controls the Company  within the meaning of
the 1933 Act or the 1934 Act (each an "INDEMNIFIED PARTY"), against any Claim or
Indemnified Damages to which any of them may become subject, under the 1933 Act,
the 1934 Act or otherwise,  insofar as such Claim or  Indemnified  Damages arise
out of or is based upon any Violation,  in each case to the extent,  and only to
the extent,  that such Violation  occurs in reliance upon and in conformity with
written information  furnished to the Company by such Investor expressly for use
in connection with such  Registration  Statement;  and, subject to Section 6(d),
such Investor will reimburse any legal or other expenses  reasonably incurred by
them in connection  with  investigating  or defending any such Claim;  provided,
however,  that the  indemnity  agreement  contained in this Section 6(b) and the
agreement with respect to contribution contained in Section 7 shall not apply to
amounts paid in settlement of any Claim if such  settlement is effected  without
the  prior  written  consent  of  such  Investor,  which  consent  shall  not be
unreasonably withheld;  provided,  further,  however, that the Investor shall be
liable under this  Section  6(b) for only that amount of a Claim or  Indemnified
Damages as does not exceed the net proceeds to such  Investor as a result of the
sale of Registrable  Securities  pursuant to such Registration  Statement.  Such
indemnity shall remain in full force and effect  regardless of any investigation
made by or on behalf of such Indemnified Party and shall survive the transfer of
the   Registrable   Securities   by  the   Investors   pursuant  to  Section  9.
Notwithstanding  anything to the contrary contained herein, the  indemnification
agreement  contained in this Section 6(b) with respect to any  prospectus  shall
not inure to the benefit of any  Indemnified  Party if the untrue  statement  or
omission of material fact contained in the prospectus was corrected and such new
prospectus  was delivered to each Investor  prior to such  Investor's use of the
prospectus to which the Claim relates.

           (c)  Promptly after receipt by an  Indemnified  Person or Indemnified
Party  under  this  Section  6 of notice of the  commencement  of any  action or
proceeding  (including any governmental action or proceeding) involving a Claim,
such  Indemnified  Person or  Indemnified  Party  shall,  if a Claim in  respect
thereof is to be made  against  any  indemnifying  party  under this  Section 6,
deliver to the indemnifying party a written notice of the commencement  thereof,
and the  indemnifying  party shall have the right to participate in, and, to the
extent the indemnifying  party so desires,  jointly with any other  indemnifying
party similarly  noticed,  to assume control of the defense thereof with counsel
mutually  satisfactory to the indemnifying  party and the Indemnified  Person or
the  Indemnified  Party,  as  the  case  may  be;  provided,  however,  that  an


                                       8
<PAGE>

Indemnified  Person or Indemnified  Party shall have the right to retain its own
counsel  with the fees and  expenses  of not more than one (1)  counsel for such
Indemnified  Person or Indemnified  Party to be paid by the indemnifying  party,
if, in the reasonable opinion of counsel retained by the indemnifying party, the
representation  by such counsel of the Indemnified  Person or Indemnified  Party
and the  indemnifying  party would be  inappropriate  due to actual or potential
differing interests between such Indemnified Person or Indemnified Party and any
other party  represented  by such counsel in such  proceeding.  The  Indemnified
Party or Indemnified Person shall cooperate fully with the indemnifying party in
connection  with any  negotiation  or defense of any such action or claim by the
indemnifying  party and shall furnish to the indemnifying  party all information
reasonably  available  to the  Indemnified  Party or  Indemnified  Person  which
relates  to such  action  or  claim.  The  indemnifying  party  shall  keep  the
Indemnified  Party or  Indemnified  Person fully apprised at all times as to the
status of the defense or any settlement  negotiations  with respect thereto.  No
indemnifying  party shall be liable for any  settlement of any action,  claim or
proceeding effected without its prior written consent;  provided,  however, that
the indemnifying party shall not unreasonably  withhold,  delay or condition its
consent.  No indemnifying party shall,  without the prior written consent of the
Indemnified  Party or  Indemnified  Person,  consent to entry of any judgment or
enter into any  settlement  or other  compromise  which  does not  include as an
unconditional  term  thereof  the giving by the  claimant or  plaintiff  to such
Indemnified  Party or  Indemnified  Person of a release  from all  liability  in
respect to such claim or litigation.  Following  indemnification as provided for
hereunder,  the  indemnifying  party  shall be  subrogated  to all rights of the
Indemnified Party or Indemnified Person with respect to all third parties, firms
or corporations  relating to the matter for which indemnification has been made.
The  failure  to  deliver  written  notice to the  indemnifying  party  within a
reasonable  time of the  commencement  of any such action shall not relieve such
indemnifying  party of any liability to the  Indemnified  Person or  Indemnified
Party under this Section 6, except to the extent that the indemnifying  party is
prejudiced in its ability to defend such action.

           (d)  The indemnification  required by this Section 6 shall be made by
periodic  payments of the amount thereof during the course of the  investigation
or defense, as and when bills are received or Indemnified Damages are incurred.

           (e)  The indemnity  agreements  contained herein shall be in addition
to (i) any  cause  of  action  or  similar  right  of the  Indemnified  Party or
Indemnified  Person  against  the  indemnifying  party or  others,  and (ii) any
liabilities the indemnifying party may be subject to pursuant to the law.

           7.   CONTRIBUTION.
                ------------

      To the extent any  indemnification  by an indemnifying party is prohibited
or  limited  by  law,  the  indemnifying   party  agrees  to  make  the  maximum
contribution  with respect to any amounts for which it would otherwise be liable
under Section 6 to the fullest extent permitted by law; provided, however, that:
(i) no seller of Registrable  Securities guilty of fraudulent  misrepresentation
(within  the  meaning of Section  11(f) of the 1933 Act)  shall be  entitled  to
contribution  from any seller of  Registrable  Securities  who was not guilty of
fraudulent misrepresentation; and (ii) contribution by any seller of Registrable


                                       9
<PAGE>

Securities shall be limited in amount to the net amount of proceeds  received by
such seller from the sale of such Registrable Securities.

           8.   REPORTS UNDER THE 1934 ACT.
                --------------------------

      With a view to making  available to the Investors the benefits of Rule 144
promulgated under the 1933 Act or any similar rule or regulation of the SEC that
may at any time permit the  Investors to sell  securities  of the Company to the
public without registration ("Rule 144"), the Company agrees to:

           (a)  make and keep public information  available,  as those terms are
understood and defined in Rule 144;

           (b)  file  with the SEC in a timely  manner  all  reports  and  other
documents required of the Company under the 1933 Act and the 1934 Act so long as
the Company  remains  subject to such  requirements  (it being  understood  that
nothing herein shall limit the Company's  obligations  under Section 4(c) of the
Securities  Purchase  Agreement)  and the  filing  of  such  reports  and  other
documents as are required by the applicable provisions of Rule 144; and

           (c)  furnish  to  each   Investor  so  long  as  such  Investor  owns
Registrable  Securities,  promptly upon request,  (i) a written statement by the
Company that it has complied  with the reporting  requirements  of Rule 144, the
1933 Act and the 1934 Act,  (ii) a copy of the most recent  annual or  quarterly
report of the  Company  and such other  reports  and  documents  so filed by the
Company,  and (iii) such other  information  as may be  reasonably  requested to
permit  the  Investors  to sell such  securities  pursuant  to Rule 144  without
registration.

           9.   ASSIGNMENT OF REGISTRATION RIGHTS.
                ---------------------------------

      The rights under this Agreement shall be  automatically  assignable by the
Investors to any transferee of all or any portion of Registrable  Securities if:
(i) the  Investor  agrees in writing with the  transferee  or assignee to assign
such rights,  and a copy of such  agreement is furnished to the Company within a
reasonable time after such assignment;  (ii) the Company is, within a reasonable
time after such transfer or assignment, furnished with written notice of (a) the
name and address of such  transferee or assignee,  and (b) the  securities  with
respect to which such  registration  rights are being  transferred  or assigned;
(iii) at or before the time the Company receives the written notice contemplated
by clause (ii) of this  sentence the  transferee  or assignee  agrees in writing
with the Company to be bound by all of the provisions contained herein; and (iv)
such  transfer   shall  have  been  made  in  accordance   with  the  applicable
requirements of the Securities Agreement.

          10.   AMENDMENT OF REGISTRATION RIGHTS.
                --------------------------------

      Provisions of this Agreement may be amended and the observance thereof may
be waived (either generally or in a particular instance and either retroactively
or  prospectively),  only with the written  consent of the Company and Investors
who then  hold at least  two-thirds  (2/3) of the  Registrable  Securities.  Any
amendment or waiver effected in accordance with this Section 10 shall be binding
upon each Investor and the Company.  No such amendment shall be effective to the


                                       10
<PAGE>

extent  that it  applies to fewer  than all of the  holders  of the  Registrable
Securities.  No consideration shall be offered or paid to any Person to amend or
consent to a waiver or  modification  of any provision of any of this  Agreement
unless the same  consideration  also is  offered  to all of the  parties to this
Agreement.

           11.  MISCELLANEOUS.
                -------------

           (a)  A Person  is deemed  to be a holder  of  Registrable  Securities
whenever  such  Person  owns or is  deemed  to own of  record  such  Registrable
Securities.  If  the  Company  receives  conflicting  instructions,  notices  or
elections  from two (2) or more  Persons  with  respect to the same  Registrable
Securities,  the  Company  shall act upon the basis of  instructions,  notice or
election received from the registered owner of such Registrable Securities.

           (b)  Any notices,  consents, waivers or other communications required
or  permitted to be given under the terms of this  Agreement  must be in writing
and will be deemed to have been  delivered:  (i) upon  receipt,  when  delivered
personally;  (ii) upon receipt, when sent by facsimile (provided confirmation of
transmission is mechanically or electronically generated and kept on file by the
sending  party);  or (iii) one (1) business day after  deposit with a nationally
recognized  overnight  delivery service,  in each case properly addressed to the
party to  receive  the  same.  The  addresses  and  facsimile  numbers  for such
communications shall be:

If to the Company, to:          Advanced Communications Technologies, Inc.
                                c/o Danson Partners, LLC
                                420 Lexington Avenue, Suite 2739
                                New York, New York 10170
                                Attention:  Wayne Danson, President and
                                            Chief Financial Officer
                                Telephone:  (646) 227-1600
                                Facsimile:  (646) 227-1666

With a copy to:                 Levinson & Lichtman, LLP
                                120 East Palmetto Park Road
                                Suite 100
                                Boca Raton, Florida 33431
                                Attention:  Jonathan J. Lichtman, Esq.
                                Telephone:  (561) 869-3600
                                Facsimile:  (561) 869-3601

With a copy to:                 Kirkpatrick & Lockhart LLP
                                201 South Biscayne Boulevard - Suite 2000
                                Miami, FL  33131-2399
                                Attention:  Clayton E. Parker, Esq.
                                Telephone:  (305) 539-3300
                                Facsimile:  (305) 358-7095


If to an  Investor,  to its  address  and  facsimile  number on the  Schedule of
Investors attached hereto, with copies to such Investor's representatives as set
forth on the  Schedule of Investors or to such other  address  and/or  facsimile


                                       11
<PAGE>

number and/or to the  attention of such other person as the recipient  party has
specified by written notice given to each other party five (5) days prior to the
effectiveness of such change.  Written  confirmation of receipt (A) given by the
recipient  of  such  notice,  consent,   waiver  or  other  communication,   (B)
mechanically  or  electronically  generated  by the sender's  facsimile  machine
containing the time, date,  recipient facsimile number and an image of the first
page of such  transmission  or (C)  provided by a courier or  overnight  courier
service shall be rebuttable  evidence of personal service,  receipt by facsimile
or receipt from a nationally recognized overnight delivery service in accordance
with clause (i), (ii) or (iii) above, respectively.

           (c)  Failure of any party to exercise  any right or remedy under this
Agreement or otherwise,  or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

           (d)  The  laws of the  State  of  Florida  shall  govern  all  issues
concerning the construction,  validity,  enforcement and  interpretation of this
Agreement,  without  giving  effect  to any  choice  of law or  conflict  of law
provision  or rule  (whether of the State of Florida or any other  jurisdiction)
that would cause the application of the laws of any jurisdiction  other than the
State of Florida.  Each party hereby  irrevocably  submits to the  non-exclusive
jurisdiction  of the  Superior  Courts of the State of New  Jersey,  sitting  in
Hudson  County,  New Jersey and  federal  courts for the  District of New Jersey
sitting Newark,  New Jersey, for the adjudication of any dispute hereunder or in
connection  herewith or with any  transaction  contemplated  hereby or discussed
herein,  and hereby  irrevocably  waives,  and agrees not to assert in any suit,
action  or  proceeding,  any  claim  that it is not  personally  subject  to the
jurisdiction of any such court,  that such suit, action or proceeding is brought
in an inconvenient forum or that the venue of such suit, action or proceeding is
improper.  Each party hereby  irrevocably waives personal service of process and
consents  to process  being  served in any such suit,  action or  proceeding  by
mailing a copy thereof to such party at the address for such notices to it under
this Agreement and agrees that such service shall constitute good and sufficient
service of process and notice thereof.  Nothing contained herein shall be deemed
to limit in any way any right to serve  process in any manner  permitted by law.
If any  provision of this  Agreement  shall be invalid or  unenforceable  in any
jurisdiction,  such invalidity or unenforceability shall not affect the validity
or enforceability of the remainder of this Agreement in that jurisdiction or the
validity or  enforceability  of any  provision  of this  Agreement  in any other
jurisdiction.  EACH PARTY HEREBY  IRREVOCABLY  WAIVES ANY RIGHT IT MAY HAVE, AND
AGREES  NOT TO  REQUEST,  A JURY  TRIAL  FOR  THE  ADJUDICATION  OF ANY  DISPUTE
HEREUNDER  OR IN  CONNECTION  HEREWITH OR ARISING OUT OF THIS  AGREEMENT  OR ANY
TRANSACTION CONTEMPLATED HEREBY.

           (e)  This Agreement, the Irrevocable Transfer Agent Instructions, the
Securities  Purchase  Agreement,  the Security  Agreement and related  documents
including the Secured Convertible  Debentures and the Escrow Agreement dated the
date hereof by and among the Company, the Investors set forth on the Schedule of
Investors  attached  hereto and Wachovia  Bank,  N.A.  (the "ESCROW  AGREEMENT")
constitute  the entire  agreement  among the parties  hereto with respect to the
subject  matter  hereof  and  thereof.  There  are  no  restrictions,  promises,
warranties or undertakings, other than those set forth or referred to herein and
therein.  This  Agreement,  the  Irrevocable  Transfer Agent  Instructions,  the
Securities  Purchase  Agreement,  the Security  Agreement and related  documents


                                       12
<PAGE>

including the Secured Convertible  Debentures and the Escrow Agreement supersede
all prior agreements and understandings among the parties hereto with respect to
the subject matter hereof and thereof.

           (f)  This Agreement shall inure to the benefit of and be binding upon
the permitted successors and assigns of each of the parties hereto.

           (g)  The headings in this Agreement are for  convenience of reference
only and shall not limit or otherwise affect the meaning hereof.

           (h)  This Agreement may be executed in identical  counterparts,  each
of which shall be deemed an original but all of which shall  constitute  one and
the same agreement.  This Agreement,  once executed by a party, may be delivered
to the other party hereto by facsimile  transmission of a copy of this Agreement
bearing the signature of the party so delivering this Agreement.

           (i)  Each  party  shall  do and  perform,  or  cause  to be done  and
performed,  all such further acts and things,  and shall execute and deliver all
such other  agreements,  certificates,  instruments and documents,  as the other
party may reasonably request in order to carry out the intent and accomplish the
purposes of this Agreement and the consummation of the transactions contemplated
hereby.

The language used in this Agreement will be deemed to be the language  chosen by
the parties to express their mutual  intent and no rules of strict  construction
will be applied against any party.

           (j)  This Agreement is intended for the benefit of the parties hereto
and  their  respective  permitted  successors  and  assigns,  and is not for the
benefit of, nor may any provision hereof be enforced by, any other Person.



                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                       13
<PAGE>

      IN WITNESS  WHEREOF,  the parties have caused this  Investor  Registration
Rights Agreement to be duly executed as of day and year first above written.

                                    COMPANY:

                                    ADVANCED COMMUNICATIONS
                                      TECHNOLOGIES, INC.

                                    By:
                                       -----------------------------------------
                                    Name:  Wayne Danson
                                    Title: President and Chief Financial Officer


                                    INVESTOR:

                                    CORNELL CAPITAL PARTNERS, LP

                                    BY:    YORKVILLE ADVISORS, LLC
                                    ITS:   GENERAL PARTNER

                                    By:
                                       -----------------------------------------
                                    Name:  Mark Angelo
                                    Title: Portfolio Manager


                                       14
<PAGE>

                              SCHEDULE OF INVESTORS
                              ---------------------


                                     INVESTOR ADDRESS
INVESTOR NAME                        AND FACSIMILE NUMBER
-----------------------------------  -------------------------------------------
<PAGE>
                                                                       EXHIBIT A

                         FORM OF NOTICE OF EFFECTIVENESS
                            OF REGISTRATION STATEMENT
                            -------------------------





            Re:   ADVANCED COMMUNICATIONS TECHNOLOGIES, INC.
                  ------------------------------------------

Ladies and Gentlemen:

      We are counsel to ADVANCED  COMMUNICATIONS  TECHNOLOGIES,  INC., a Florida
corporation (the "COMPANY"), and have represented the Company in connection with
that certain Securities  Purchase Agreement (the "PURCHASE  AGREEMENT")  entered
into by and among the Company and the investors named therein (collectively, the
"INVESTORS") pursuant to which the Company issued to the Investors shares of its
Common  Stock,  no par value per share (the  "COMMON  STOCK").  Pursuant  to the
Purchase  Agreement,  the Company  also has entered into a  Registration  Rights
Agreement with the Investors (the "REGISTRATION  RIGHTS AGREEMENT")  pursuant to
which the Company  agreed,  among other  things,  to  register  the  Registrable
Securities  (as  defined  in  the  Registration   Rights  Agreement)  under  the
Securities  Act of 1933,  as amended (the "1933 ACT").  In  connection  with the
Company's  obligations under the Registration Rights Agreement,  on ____________
____,  the Company filed a  Registration  Statement on Form  ________  (File No.
333-_____________)  (the  "REGISTRATION  STATEMENT")  with  the  Securities  and
Exchange SEC (the "SEC") relating to the Registrable Securities which names each
of the Investors as a selling stockholder there under.

      In connection with the foregoing, we advise you that a member of the SEC's
staff has advised us by  telephone  that the SEC has entered an order  declaring
the  Registration  Statement  effective  under  the 1933 Act at  [ENTER  TIME OF
EFFECTIVENESS] on [ENTER DATE OF EFFECTIVENESS] and we have no knowledge,  after
telephonic  inquiry  of a  member  of the  SEC's  staff,  that  any  stop  order
suspending its  effectiveness  has been issued or that any  proceedings for that
purpose  are  pending  before,  or  threatened  by, the SEC and the  Registrable
Securities  are  available  for  resale  under  the  1933  Act  pursuant  to the
Registration Statement.

                                    Very truly yours,

                                    KIRKPATRICK & LOCKHART LLP


                                    By:
                                       ----------------------------

cc:   [LIST NAMES OF INVESTORS]