Document:

EXHIBIT 4.18

THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR ANY STATE SECURITIES LAWS. IT MAY NOT BE SOLD, OFFERED FOR SALE,
TRANSFERRED OR ASSIGNED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER SAID ACT AND ANY APPLICABLE STATE SECURITIES LAW OR AN APPLICABLE
EXEMPTION FROM SUCH REGISTRATION REQUIREMENTS.

February 4, 2000
                            ABLE TELCOM HOLDING CORP.

                                [Second Warrants]

                          Common Stock Purchase Warrant

         Able Telcom Holding Corp., a Florida corporation (the "COMPANY"),
hereby certifies that for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, [____________], having an address
at [____________________________________________________________] ("PURCHASER")
or any other Warrant Holder, as defined below, is entitled, on the terms and
conditions set forth below, to purchase from the Company at any time beginning
on the date hereof and ending on the fifth anniversary of the date hereof,
100,000 fully paid and nonassessable shares of Common Stock, $.001 par value, of
the Company (the "COMMON STOCK"), at a purchase price per share of Common Stock
equal to $10.127 (the "Purchase Price"). Such Purchase Price may from time to
time be adjusted pursuant to Section 6 herein.

           1.       DEFINITIONS.

                    (a) The term "AGREEMENT" shall mean the Securities Exchange
Agreement dated as of February 4, 2000, between the Company and the Holders
signatory thereto.

                    (b) The term "BEST EFFORTS" means as to any party obligated
to use its Best Efforts to accomplish a particular objective that the obligated
party is required to make diligent, good faith, prompt, substantial and
persistent efforts as a prudent person desiring to achieve the applicable
objective would use in order to ensure that such objective is achieved as
expeditiously as possible.

                    (c) The term "CLOSING PRICE" shall have the meaning set
forth in the Agreement.

                    (d) The term "WARRANT HOLDER" shall mean the Purchaser or
any assignee of all or any portion of this Warrant.

                    (e) The term "WARRANT SHARES" shall mean the Shares of
Common Stock or other securities issuable upon exercise of this Warrant.

           Capitalized terms used but not defined in this Warrant shall have the
meanings specified in the Agreement.

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           2.       EXERCISE OF WARRANT.

           This Warrant may be exercised by the Warrant Holder, in whole or in
part, at any time and from time to time by either of the following methods:

           (a) The Warrant Holder may surrender this Warrant, together with the
form of subscription at the end hereof duly executed by such Warrant Holder
("SUBSCRIPTION NOTICE"), at the offices of the Company or any transfer agent for
the Common Stock; together with payment of the aggregate Purchase Price for all
Warrant Shares exercised; or

           (b) The Warrant Holder may also exercise this Warrant, in whole or in
part, in a "cashless" or "net-issue" exercise by delivering to the offices of
the Company or any transfer agent for the Common Stock this Warrant, together
with a Subscription Notice specifying the number of Warrant Shares to be
delivered to such Warrant Holder ("DELIVERABLE SHARES") and the number of
Warrant Shares with respect to which this Warrant is being surrendered in
payment of the aggregate Purchase Price for the Deliverable Shares ("SURRENDERED
SHARES"); provided that the Purchase Price multiplied by the number of
Deliverable Shares shall not exceed the value of the Surrendered Shares; and
provided further that the sum of the number of Deliverable Shares and the number
of Surrendered Shares so specified shall not exceed the aggregate number of
Warrant Shares represented by this Warrant. For the purposes of this provision,
each Warrant Share as to which this Warrant is surrendered will be attributed a
value equal to the fair market value (as defined below) of the Warrant Share
minus the Purchase Price of the Warrant Share (the "Spread"). The number of
Deliverable Shares shall be equal to (i) the number of Surrendered Shares
multiplied by the Spread; divided by (ii) the Purchase Price on the date of
exercise.

           In the event that the Warrant is not exercised in full, the number of
Warrant Shares shall be reduced by the number of such Warrant Shares for which
this Warrant is exercised and/or surrendered, and the Company, at its expense,
shall within three (3) Trading Days (as defined below) issue and deliver or upon
the order of Warrant Holder a new Warrant of like tenor in the name of Warrant
Holder or as Warrant Holder (upon payment by Warrant Holder of any applicable
transfer taxes) may request, reflecting such adjusted Warrant Shares.

           3.       DELIVERY OF STOCK CERTIFICATES.

                    (a) Subject to the terms and conditions of this Warrant, as
soon as practicable after the exercise of this Warrant in full or in part, and
in any event within three (3) Trading Days thereafter, the Company shall
transmit the certificates (together with any other stock or other securities or
property to which Warrant Holder is entitled upon exercise) by messenger or
overnight delivery service to reach the address designated by such holder within
three (3) Trading Days after the receipt of the Subscription Notice ("T+3"). If
such certificates are not received by the Warrant Holder within T+3, then the
Warrant Holder will be entitled to revoke and withdraw its exercise of its
Warrant at any time prior to its receipt of those certificates.

                         In lieu of delivering physical certificates
representing the Warrant Shares deliverable upon exercise of Warrants, provided
the Company's transfer agent is participating in the Depository Trust Company
("DTC") Fast Automated Securities Transfer ("FAST") program, upon request of the
Warrant Holder, the Company shall use its Best Efforts to cause its transfer
agent to electronically transmit the Warrant Shares issuable upon exercise to
the Warrant Holder, by crediting the account of Warrant Holder's prime broker
with DTC through its Deposit Withdrawal Agent Commission ("DWAC") system. The
time periods for delivery described above shall apply to the electronic
transmittals through the DWAC system. The parties

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agree to coordinate with DTC to accomplish this objective. The exchange pursuant
to Section 3 shall be deemed to have been made immediately prior to the close of
business on the date of the Subscription Notice. The person or persons entitled
to receive the Warrant Shares issuable upon such exercise shall be treated for
all purposes as the record holder or holders of such Common Shares at the close
of business on the date of the Subscription Notice.

                         The term "TRADING DAY" means (x) if the Common Stock is
listed on the New York Stock Exchange or the American Stock Exchange, a day on
which there is trading on such stock exchange, (y) if the Common Stock is not
listed on either of such stock exchanges but sale prices of the Common Stock are
reported on an automated quotation system, a day on which trading is reported on
the principal automated quotation system on which sales of the Common Stock are
reported, or (z) if the foregoing provisions are inapplicable, a day on which
quotations are reported by National Quotation Bureau Incorporated.

                    (b) This Warrant may not be exercised as to fractional
shares of Common Stock. In the event that the exercise of this Warrant, in full
or in part, would result in the issuance of any fractional share of Common
Stock, then in such event the Warrant Holder shall be entitled to cash equal to
the fair market value of such fractional share. For purposes of this Warrant,
"FAIR MARKET VALUE" shall equal the closing trading price of the Common Stock on
the Approved Market (an "Approved Market" is the New York Stock Exchange or the
American Stock Exchange or the Nasdaq National Market) which is the principal
trading exchange or market for the Common Stock (the "PRINCIPAL MARKET") on the
date of determination or, if the Common Stock is not listed or admitted to
trading on any Approved Market, the average of the closing bid and asked prices
on the over-the-counter market as furnished by any New York Stock Exchange
member firm reasonably selected from time to time by the Company for that
purpose and reasonably acceptable to the Warrant Holder, or, if the Common Stock
is not listed or admitted to trading on any Approved Market or traded
over-the-counter and the average price cannot be determined as contemplated
above, the fair market value of the Common Stock shall be as reasonably
determined in good faith by the Company's Board of Directors with the
concurrence of the Warrant Holder.

           4.       REPRESENTATIONS AND COVENANTS OF THE COMPANY.

                    (a) The Company shall comply with its obligations under the
Registration Rights Agreement with respect to the Warrant Shares, including,
without limitation, the Company's obligation to have filed and declared and
maintained effective a registration statement registering the Warrant Shares
under the Securities Act of 1933, as amended (the "ACT").

                    (b) The Company shall use its Best Efforts to take all
necessary action and proceedings as may be required and permitted by applicable
law, rule and regulation, including, without limitation, the notification of the
Principal Market, for the legal and valid issuance of this Warrant and the
Warrant Shares to the Warrant Holder under this Warrant.

                    (c) From the date hereof through the last date on which this
Warrant is exercisable, the Company shall use its Best Efforts to take all steps
necessary to insure that the Common Stock remains listed on the Principal
Market.

                    (d) The Warrant Shares, when issued in accordance with the
terms hereof, will be duly authorized and, when paid for or issued in accordance
with the terms hereof, shall be validly issued, fully paid

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and non-assessable. The Company has authorized and reserved for issuance to
Warrant Holder the requisite number of shares of Common Stock to be issued
pursuant to this Warrant.

                    (e) The Company shall at all times reserve and keep
available, solely for issuance and delivery as Warrant Shares hereunder, 105% of
such number of shares of Common Stock as shall from time to time be issuable
hereunder.

                    (f) With a view to making available to the Warrant Holder
the benefits of Rule 144 promulgated under the Act and any other rule or
regulation of the Securities and Exchange Commission ("SEC") that may at any
time permit Warrant Holder to sell securities of the Company to the public
without registration, the Company agrees to use its Best Efforts to:

                             i) make and keep public information available, as
                    those terms are understood and defined in Rule 144, at all
                    times;

                             ii) file with the SEC in a timely manner all
                    reports and other documents required of the Company under
                    the Act and the Securities Exchange Act of 1934, as amended
                    (the "EXCHANGE ACT"); and

                             iii) furnish to any Warrant Holder forthwith upon
                    request a written statement by the Company that it has
                    complied with the reporting requirements of Rule 144 and of
                    the Act and the Exchange Act, a copy of the most recent
                    annual or quarterly report of the Company, and such other
                    reports and documents so filed by the Company as may be
                    reasonably requested to permit any such Warrant Holder to
                    take advantage of any rule or regulation of the SEC
                    permitting the selling of any such securities without
                    registration.

                    (g) In the event that the Company is unable to issue shares
upon exercise of this Warrant, in whole or in part, by the Holder, then the
Company shall pay to the Holder a cash payment, by wire transfer in immediately
available funds to an account designated by the Holder, per share in an amount
equal to the difference between the Purchase Price and the fair market value of
the Common Stock on the date of exercise.

           5.       REPRESENTATIONS AND COVENANTS OF THE PURCHASER.

                    The Purchaser shall not resell Warrant Shares, unless such
resale is pursuant to an effective registration statement under the Act or
pursuant to an applicable exemption from such registration requirements.

           6.       ADJUSTMENT OF PURCHASE PRICE AND NUMBER OF SHARES. The
number of and kind of securities purchasable upon exercise of this Warrant and
the Purchase Price shall be subject to adjustment from time to time as follows:

                    (a) SUBDIVISIONS, COMBINATIONS AND OTHER ISSUANCES. If the
Company shall at any time after the date hereof but prior to the expiration of
this Warrant subdivide its outstanding securities as to which purchase rights
under this Warrant exist, by split-up, spin-off, or otherwise, or combine its
outstanding securities as to which purchase rights under this Warrant exist, the
number of Warrant Shares as to which this Warrant is exercisable as of the date
of such subdivision, split-up, spin-off or combination shall forthwith be

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proportionately increased in the case of a subdivision, or proportionately
decreased in the case of a combination. Appropriate proportional adjustments
(decrease in the case of subdivision, increase in the case of combination) shall
also be made to the Purchase Price payable per share, so that the aggregate
Purchase Price payable for the total number of Warrant Shares or Warrants
purchasable under this Warrant as of such date shall remain the same as it would
have been before such subdivision or combination.

                    (b) STOCK DIVIDEND. If at any time after the date hereof the
Company declares a dividend or other distribution on Common Stock payable in
Common Stock or other securities or rights convertible into or exchangeable for
Common Stock ("COMMON STOCK EQUIVALENTS") without payment of any consideration
by holders of Common Stock for the additional shares of Common Stock or the
Common Stock Equivalents (including the additional shares of Common Stock
issuable upon exercise or conversion thereof), then the number of shares of
Common Stock for which this Warrant may be exercised shall be increased as of
the record date (or the date of such dividend distribution if no record date is
set) for determining which holders of Common Stock shall be entitled to receive
such dividends, in proportion to the increase in the number of outstanding
shares (and shares of Common Stock issuable upon conversion of all such
securities convertible into Common Stock) of Common Stock as a result of such
dividend, and the Purchase Price shall be proportionately reduced so that the
aggregate Purchase Price for all the Warrant Shares issuable hereunder
immediately after the record date (or on the date of such distribution, if
applicable), for such dividend shall equal the aggregate Purchase Price so
payable immediately before such record date (or on the date of such
distribution, if applicable).

                    (c) OTHER DISTRIBUTIONS. If at any time after the date
hereof the Company distributes to holders of its Common Stock, other than as
part of its dissolution, liquidation or the winding up of its affairs, any
shares of its capital stock, any evidence of indebtedness or any of its assets
(other than Common Stock), then the number of Warrant Shares for which this
Warrant is exercisable shall be increased to equal: (i) the number of Warrant
Shares for which this Warrant is exercisable immediately prior to such event,
(ii) multiplied by a fraction, (A) the numerator of which shall be the fair
market value per share of Common Stock on the record date for the dividend or
distribution, and (B) the denominator of which shall be the fair market value
price per share of Common Stock on the record date for the dividend or
distribution minus the amount allocable to one share of Common Stock of the
value (as jointly determined in good faith by the Board of Directors of the
Company and the Warrant Holder) of any and all such evidences of indebtedness,
shares of capital stock, other securities or property, so distributed. The
Purchase Price shall be reduced to equal: (i) the Purchase Price in effect
immediately before the occurrence of any event (ii) multiplied by a fraction,
(A) the numerator of which is the number of Warrant Shares for which this
Warrant is exercisable immediately before the adjustment, and (B) the
denominator of which is the number of Warrant Shares for which this Warrant is
exercisable immediately after the adjustment.

                    (d) MERGER, ETC. If at any time after the date hereof there
shall be a merger or consolidation of the Company with or into or a transfer of
all or substantially all of the assets of the Company to another entity, then
the Warrant Holder shall be entitled to receive upon or after such transfer,
merger or consolidation becoming effective, and upon payment of the Purchase
Price then in effect, the number of shares or other securities or property of
the Company or of the successor corporation resulting from such merger or
consolidation, which would have been received by Warrant Holder for the shares
of stock subject to this Warrant had this Warrant been exercised just prior to
such transfer, merger or consolidation becoming effective or to the applicable
record date thereof, as the case may be. The Company will not merge or
consolidate with or into any other corporation, or sell or otherwise transfer
its property, assets and business substantially as an entirety to another
corporation, unless the corporation resulting from such merger or consolidation
(if not the Company), or such transferee corporation, as the case may be, shall
expressly assume,

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by supplemental agreement reasonably satisfactory in form and substance to the
Warrant Holder, the due and punctual performance and observance of each and
every covenant and condition of this Warrant to be performed and observed by the
Company.

                    (e) RECLASSIFICATION, ETC. If at any time after the date
hereof there shall be a reorganization or reclassification of the securities as
to which purchase rights under this Warrant exist into the same or a different
number of securities of any other class or classes, then the Warrant Holder
shall thereafter be entitled to receive upon exercise of this Warrant, during
the period specified herein and upon payment of the Purchase Price then in
effect, the number of shares or other securities or property resulting from such
reorganization or reclassification, which would have been received by the
Warrant Holder for the shares of stock subject to this Warrant had this Warrant
at such time been exercised.

           7.       NO IMPAIRMENT. The Company will not, by amendment of its
Articles of Incorporation or through any reorganization, transfer of assets,
consolidation, merger, dissolution, issue or sale of securities or any other
voluntary action, avoid or seek to avoid the observance or performance of any of
the terms of this Warrant, but will at all times in good faith assist in the
carrying out of all such terms and in the taking of all such action as may be
necessary or appropriate in order to protect the rights of the Warrant Holder
against impairment. Without limiting the generality of the foregoing, the
Company (a) will not increase the par value of any Warrant Shares above the
amount payable therefor on such exercise, and (b) will take all such action as
may be reasonably necessary or appropriate in order that the Company may validly
and legally issue fully paid and nonassessable Warrant Shares on the exercise of
this Warrant.

           8.       NOTICE OF ADJUSTMENTS. Whenever the Purchase Price or number
of Shares purchasable hereunder shall be adjusted pursuant to Section 6 hereof,
the Company shall execute and deliver to the Warrant Holder a certificate
setting forth, in reasonable detail, the event requiring the adjustment, the
amount of the adjustment, the method by which such adjustment was calculated and
the Purchase Price and number of shares purchasable hereunder after giving
effect to such adjustment, and shall cause a copy of such certificate to be
mailed (by first class mail, postage prepaid) to the Warrant Holder.

           9.       RIGHTS AS SHAREHOLDER. Prior to exercise of this Warrant,
the Warrant Holder shall not be entitled to any rights as a shareholder of the
Company with respect to the Warrant Shares, including (without limitation) the
right to vote such shares, receive dividends or other distributions thereon or
be notified of shareholder meetings. However, in the event of any taking by the
Company of a record of the holders of any class of securities for the purpose of
determining the holders thereof who are entitled to receive any dividend (other
than a cash dividend) or other distribution, any right to subscribe for,
purchase or otherwise acquire any shares of stock of any class or any other
securities or property, or to receive any other right, the Company shall mail to
each Warrant Holder, at least 10 Trading Days prior to the date specified
therein, a notice specifying the date on which any such record date is to be
taken for the purpose of such dividend, distribution or right, and the amount
and character of such dividend, distribution or right.

           10.      LIMITATION ON EXERCISE. Notwithstanding anything to the
contrary contained herein, this Warrant may not be exercised by the Warrant
Holder to the extent that, after giving effect to Warrant Shares to be issued
pursuant to a Subscription Notice, the total number of shares of Common Stock
deemed beneficially owned by such holder (other than by virtue of ownership of
this Warrant, or ownership of other securities that have limitations on the
holder's rights to convert or exercise similar to the limitations set forth
herein), together with all shares of Common Stock deemed beneficially owned by
the holder's "affiliates" (as defined in Rule 144 of the Act) that would be
aggregated for purposes of determining whether a group under Section 13(d) of
the Exchange Act exists, would exceed 4.9% (the "4.9% LIMIT"); PROVIDED that (w)
each Warrant Holder

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shall have the right at any time and from time to time to reduce the 4.9% Limit
immediately upon notice to the Company or in the event of a Change in Control
Transaction, (x) each Warrant Holder shall have the right at any time and from
time to time to increase the 4.9% Limit or otherwise waive in whole or in part
the restrictions of this Section 10 upon 61 days' prior notice to the Company or
immediately in the event of a Change in Control Transaction, (y) each Warrant
Holder can make subsequent adjustments pursuant to (w) or (x) any number of
times from time to time (which adjustment shall be effective immediately if it
results in a decrease in the 4.9% Limit or shall be effective upon 61 days'
prior written notice or immediately in the event of a Change in Control
Transaction if it results in an increase in the 4.9% Limit) and (z) each Warrant
Holder may eliminate or reinstate this limitation at any time and from time to
time (which elimination will be effective upon 61 days' prior notice and which
reinstatement will be effective immediately) PROVIDED, FURTHER, that the Warrant
Holder shall not be permitted to waive any provision of this Section 10 to the
extent that, if the Warrant Holder were to acquire additional shares of Common
Stock pursuant to such waiver, the limitation set forth in the first sentence of
this Section 10 would be exceeded if the 4.9% Limit were 9.99%. Without limiting
the foregoing, in the event of a Change in Control Transaction, any holder may
reinstate immediately (in whole or in part) the 4.9% Limit, notwithstanding such
Change in Control Transaction, without imposing such requirement on, or
otherwise changing such holder's rights with respect to, any other Change in
Control Transaction. For this purpose, any material modification of the terms of
a Change in Control Transaction will be deemed to create a new Change in Control
Transaction. The term "DEEMED BENEFICIALLY OWNED" as used in this Warrant shall
exclude shares that might otherwise be deemed beneficially owned by reason of
the redeemability of the Preferred Shares. A "CHANGE IN CONTROL TRANSACTION"
will be deemed to have occurred upon the earlier of the announcement or
consummation of a transaction or series of transactions (other than the Merger)
involving (x) any consolidation or merger of the Company with or into any other
corporation or other entity or person (whether or not the Company is the
surviving corporation), or any other corporate reorganization or transaction or
series of related transactions in which in excess of 50% of the Company's voting
power is transferred through a merger, consolidation, tender offer or similar
transaction, or (y) in excess of 50% of the Corporation's Board of Directors
consists of directors not nominated by the prior Board of Directors of the
Company, or (z) any person (as defined in Section 13(d) of the Exchange Act,
together with its affiliates and associates (as such terms are defined in Rule
405 under the Act), beneficially owns or is deemed to beneficially own (as
described in Rule 13d-3 under the Exchange Act without regard to the 60-day
exercise period) in excess of 50% of the Company's voting power. The delivery of
a Subscription Notice by the Warrant Holder shall be deemed a representation by
such holder that it is in compliance with this paragraph.

           11.      REPLACEMENT OF WARRANT. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and, in the case of any such loss, theft or destruction of this
Warrant, on delivery of an indemnity agreement or security reasonably
satisfactory in form and amount to the Company or, in the case of any such
mutilation, on surrender and cancellation of such Warrant, the Company at its
expense promptly will execute and deliver, in lieu thereof a new Warrant of like
tenor.

           12.      SPECIFIC PERFORMANCE; CONSENT TO JURISDICTION; CHOICE OF LAW

                    (a) The Company and the Warrant Holder acknowledge and agree
that irreparable damage would occur in the event that any of the provisions of
this Warrant were not performed in accordance with their specific terms or were
otherwise breached. It is accordingly agreed that the parties shall he entitled
to an injunction or injunctions to prevent or cure breaches of the provisions of
this Warrant and to enforce specifically the terms and provisions hereof, this
being in addition to any other remedy to which either of them may be entitled by
law or equity.

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                    (b) EACH OF THE COMPANY AND THE WARRANT HOLDER (I) HEREBY
IRREVOCABLY SUBMITS TO THE EXCLUSIVE JURISDICTION OF THE STATE AND FEDERAL
COURTS LOCATED IN NEW YORK COUNTY, NEW YORK FOR THE PURPOSES OF ANY SUIT, ACTION
OR PROCEEDING ARISING OUT OF OR RELATING TO THIS WARRANT AND (II) HEREBY WAIVES,
AND AGREES NOT TO ASSERT IN ANY SUCH SUIT, ACTION OR PROCEEDING, ANY CLAIM THAT
IT IS NOT PERSONALLY SUBJECT TO THE JURISDICTION OF SUCH COURT, THAT THE SUIT,
ACTION OR PROCEEDING IS BROUGHT IN AN INCONVENIENT FORUM OR THAT THE VENUE OF
THE SUIT, ACTION OR PROCEEDING IS IMPROPER. EACH OF THE COMPANY AND THE WARRANT
HOLDER CONSENTS TO PROCESS BEING SERVED IN ANY SUCH SUIT, ACTION OR PROCEEDING
BY MAILING A COPY THEREOF TO SUCH PARTY AT THE ADDRESS IN EFFECT FOR NOTICES TO
IT UNDER THIS WARRANT AND AGREES THAT SUCH SERVICE SHALL CONSTITUTE GOOD AND
SUFFICIENT SERVICE OF PROCESS AND NOTICE THEREOF. NOTHING IN THIS PARAGRAPH
SHALL AFFECT OR LIMIT ANY RIGHT TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED
BY APPLICABLE LAW.

                    (c) THE COMPANY AND THE WARRANT HOLDER IRREVOCABLY WAIVE
THEIR RIGHT TO TRIAL BY JURY.

                    (d) THIS WARRANT SHALL BE GOVERNED BY AND CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK
APPLICABLE TO CONTRACTS EXECUTED AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE
AND, WHERE APPLICABLE, FEDERAL LAW.

           13.      ENTIRE AGREEMENT; AMENDMENTS. This Warrant, the Exhibits
hereto and the provisions contained in the Securities Exchange Agreement or the
Registration Rights Agreement contain the entire understanding of the parties
with respect to the matters covered hereby and thereby and, except as
specifically set forth herein and therein, neither the Company nor the Warrant
Holder makes any representation, warranty, covenant or undertaking with respect
to such matters. No provision of this Agreement may be waived or amended other
than by a written instrument signed by the party against whom enforcement of any
such amendment or waiver is sought.

           14.      NOTICES. Any notice or other communication required or
permitted to be given hereunder shall be in writing and shall be effective (a)
upon hand delivery or delivery by telex (with correct answer back received),
telecopy or facsimile at the address or number designated below (if delivered on
a business day during normal business hours where such notice is to be
received), or the first business day following such delivery (if delivered other
than on a business day during normal business hours where such notice is to be
received) or (b) on the second business day following the date of mailing by
express courier service, fully prepaid, addressed to such address, or upon
actual receipt of such mailing, whichever shall first occur. The addresses for
such communications shall be:

                  to the Company:

                  Able Telcom Holding Corp.
                  1000 Holcomb Woods Parkway
                  Suite 440
                  Roswell, GA.  30076
                  Attn: President
                  Facsimile: (770) 993-8532

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                  to the Warrant Holder:

                  c/o The Palladin Group, L.P.
                  195 Maplewood Avenue
                  Maplewood NJ 07040
                  Attn:  Robert L. Chender
                  Facsimile:  (973) 313-6491

Either party hereto may from time to time change its address for notices under
this Section 14 by giving at least 10 days' prior written notice of such changed
address to the other party hereto.

           15.      MISCELLANEOUS. This Warrant and any term hereof may be
changed, waived, discharged or terminated only by an instrument in writing
signed by the party against which enforcement of such change, waiver, discharge
or termination is sought. The headings in this Warrant are for purposes of
reference only, and shall not limit or otherwise affect any of the terms hereof.
The invalidity or unenforceability of any provision hereof shall in no way
affect the validity or enforceability of any other provision.

           16.      ASSIGNMENT. This Warrant may be transferred or assigned, in
whole or in part, at any time and from time to time by the then Warrant Holder
by submitting this Warrant to the Company together with a duly executed
Assignment in substantially the form and substance of the Form of Assignment
which accompanies this Warrant and, upon the Company's receipt hereof, and in
any event, within three (3) business days thereafter, the Company shall issue a
Warrant to the Warrant Holder to evidence that portion of this Warrant, if any
as shall not have been so transferred or assigned; provided, however, that such
transfer or assignment shall be registered or qualified under all applicable
securities laws, or otherwise exempt therefrom.

           17.      SUCCESSORS AND ASSIGNS. This Warrant shall be binding upon
any entity succeeding to the Company by merger, consolidation or acquisition of
all or substantially all of the Company's assets.

                            [SIGNATURE PAGE FOLLOWS]

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Dated:  February 4, 2000               ABLE TELCOM HOLDING CORP.

                                       By:
                                          --------------------------------------
                                       Name:
                                       Title:
[CORPORATE SEAL]

Attest:

By:
      Its

   (SIGNATURE PAGE OF ABLE TELCOM HOLDING CORP. COMMON STOCK PURCHASE WARRANT)

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<PAGE>

                              (SUBSCRIPTION NOTICE)
                            FORM OF WARRANT EXERCISE
                   (TO BE SIGNED ONLY ON EXERCISE OF WARRANT)

TO:    ABLE TELCOM HOLDING CORP.
ATTN:  SECRETARY

       The undersigned, the holder of the within Warrant, hereby irrevocably
elects to exercise this Warrant:

       _____ (A)  for, and to purchase thereunder, ____________ shares of
                  Common Stock of Able Telcom Holding Corp., a Florida
                  corporation (the "Common Stock"), and herewith, or by wire
                  transfer, makes payment of $ _____________ therefor; or

       _____ (B)  in a "cashless" or "net-issue exercise" for, and to
                  purchase thereunder, ______ shares of Common Stock, and
                  herewith makes payment therefor with _____________ Surrendered
                  Warrant Shares.

       The undersigned requests that the certificates for such shares be issued
in the name of, and

       _____ (A)  delivered to ___________________ , whose address is
                  __________________ ; or

       _____ (B)  electronically transmitted and credited to the account of
                  _______________ , undersigned's prime broker (Account
                  No.________________ ) with Depository Trust Company through
                  its Deposit Withdrawal Agent Commission system.

Dated:

                                     ___________________________________________
                                     (Signature must conform to name of holder
                                     as specified on the face of the Warrant)

                                     ___________________________________________
                                                      (Address)

                                     Tax Identification Number:_________________

                                       11
<PAGE>

                               FORM OF ASSIGNMENT
                   (TO BE SIGNED ONLY ON TRANSFER OF WARRANT)

For value received, the undersigned hereby sells, assigns, and transfers unto
________________ the right represented by the within Warrant to purchase
_____________ shares of Common Stock of ABLE TELCOM HOLDING CORP., a Florida
corporation, to which the within Warrant relates, and appoints ________________
Attorney to transfer such right on the books of ABLE TELCOM HOLDING CORP., a
Florida corporation, with full power of substitution of premises.

Dated: ______________

                                     ___________________________________________
                                     (Signature must conform to name of holder
                                     as specified on the face of the Warrant)

                                     ___________________________________________
                                                      (Address)

Signed in the presence of:

___________________________________________

                                       12EXHIBIT 4.19

                                                               EXECUTION VERSION

                          SECURITIES EXCHANGE AGREEMENT

         This SECURITIES EXCHANGE AGREEMENT is dated as of February 4, 2000 (the
"Agreement") by and between RGC International Investors, LDC (the "Holder") and
Able Telcom Holding Corp. ("Company").

         WHEREAS, the Holder has entered into that certain Convertible Preferred
Stock Purchase Agreement with the Company, dated June 26, 1998, including all
exhibits thereto, attached hereto as EXHIBIT A (the "Purchase Agreement"); and
pursuant thereto, on June 30, 1998, the Holder acquired 2,000 shares of Series B
Preferred Stock (the "Preferred Shares");

         WHEREAS, the Holder currently holds 375 Preferred Shares with a
Conversion Price equal to $2.844; and

         WHEREAS, the Holder desires to exchange 375 Preferred Shares and, in
consideration of such exchange, the Company desires to issue to the Holder
Common Stock, warrants exercisable for shares of Common Stock and the Closing
Cash Payment (as defined below).

         NOW, THEREFORE, intending to be legally bound hereby, the parties
hereto agree as follows:

                                   ARTICLE 1.
                        EXCHANGE OF THE PREFERRED SHARES

         1.1 EXCHANGE OF THE PREFERRED SHARES AND PAYMENT OF THE CLOSING CASH
PAYMENT. At the Closing (as defined below):

                  (a) The Company will issue and deliver to the Holder 500,000
shares of Common Stock.

                  (b) The Company will issue and deliver to the Holder warrants
exercisable for 100,000 shares of Common Stock at a price per share equal to
130% of the Closing Price (as defined in the Warrants) (the "Warrants") attached
hereto as EXHIBIT B.

                  (c) The Company will pay to the Holder a cash payment, by wire
transfer in immediately available funds to an account designated by the Holder,
in an amount equal to $5,031,978 (the "Closing Cash Payment").

                  (d) The Company will deliver an executed Registration Rights
Agreement dated February 4, 2000 covering the Common Stock and the shares of
Common Stock issuable upon exercise of the Warrants.

                  (e) The Company will deliver to the Holder an opinion of
counsel to the Company satisfactory in form and substance to the Holder.

                  (f) The Holder will deliver to the Company the Preferred
Shares.

<PAGE>

                  (g) The closing of the exchange of the Preferred Shares and
the issuance of the Common Stock and Warrants (the "Closing"), shall take place
at the offices of Arnold & Porter, 555 12th Street N.W., Washington, D.C., at
10:00 a.m., local time on February 4, 2000 or such other time and place and/or
on such other date as the Holder and the Company may agree. As conditions to the
Closing, all of the representations and warranties contained in Sections 1.2 and
1.3 hereof shall be true and correct as of the Closing as certified by both the
Holder and Company at the Closing.

         1.2      COMPANY REPRESENTATIONS AND WARRANTIES.

         In connection with the exchange of the Preferred Shares and the
issuance of the Common Stock and Warrants hereunder, the Company represents and
warrants to the Holder that:

                  (a) The Company has all requisite corporate power and
authority to enter into and perform this Agreement and to consummate the
transaction contemplated hereby and to issue the Common Stock and Warrants in
accordance with the terms hereof.

                  (b) The execution and delivery of this Agreement and the
Warrants and the consummation by the Company of the transactions contemplated
hereby and thereby, including the issuance of the Common Stock and the Warrants
contemplated by this Agreement, have been duly authorized by all necessary
corporate action, and no further consent or authorization of the Company or its
Board of Directors (or any committee or subcommittee thereof) or its
stockholders is required.

                  (c) This Agreement constitutes, and upon execution, issuance
and delivery thereof, the Warrants and the Registration Rights Agreement shall
constitute, valid and binding obligations of the Company enforceable against the
Company in accordance with their terms, except as such enforceability may be
limited by applicable bankruptcy, insolvency, reorganization, moratorium,
liquidation or similar laws relating to, or affecting generally the enforcement
of creditors' rights and remedies or by other equitable principles of general
application.

                  (d) The Common Stock and the shares of Common Stock issuable
upon the exercise of the Warrants are duly authorized and reserved for issuance
and, upon issuance in accordance with the terms of this Agreement (in the case
of the Common Stock) and upon exercise of the Warrants in accordance with the
Warrants (in the case of shares issuable upon exercise of the Warrants), such
Common Stock and such shares of Common Stock issuable upon the exercise of the
Warrants, will be validly issued, fully paid and non-assessable, free and clear
of any and all taxes, liens, claims and encumbrances, and entitled to be traded
on the Nasdaq NMS, the American Stock Exchange or the New York Stock Exchange,
and the holders of such Common Stock and such shares of Common Stock issuable
upon the exercise of the Warrants shall be entitled to all rights and
preferences accorded to a holder of Common Stock. The outstanding shares of
Common Stock are currently listed on the Nasdaq NMS.

         1.3      HOLDER'S REPRESENTATIONS AND WARRANTIES

         In connection with the exchange of the Preferred Shares and the
issuance of the Common Stock and Warrants hereunder, the Holder represents and
warrants to the Company that:

                  (a) The Holder has the legal capacity and authority to enter
into and perform all of its obligations under this Agreement. This Agreement
constitutes the legal, valid and binding

                                       2
<PAGE>

obligation of the Holder, enforceable against the Holder in accordance with its
terms. The execution, delivery and performance of this Agreement does not and
will not conflict with, violate, cause a breach of or constitute a default under
(i) any agreement, contract or other instrument or obligation to which the
Holder is a party or by which the Holder is bound or (ii) any judgment, order,
decree, statute, rule or regulation to which the Holder is subject.

                  (b) The Holder is an "accredited investor," as such term is
defined in Rule 501 of Regulation D promulgated under the Act. The Holder and
its agents and representatives have such knowledge and experience in financial
and business matters as to enable it to utilize the information made available
to them in connection with the transactions contemplated hereby to evaluate the
merits and risks of the exchange contemplated hereby and to make an informed
decision with respect thereto, and such an evaluation and informed decision have
been made.

                  (c) The Holder is entering into this Agreement for its own
account and the Holder has no present arrangement (whether or not legally
binding) at any time to sell the Common Stock or Warrants to or through any
person or entity; PROVIDED, however, that by making the representations herein,
the Holder does not agree to hold the Common Stock or Warrants for any minimum
or other specific term and reserves the right to dispose of the Common Stock and
Warrants at any time in accordance with federal and state securities laws
applicable to such disposition.

                                   ARTICLE 2.
                               GENERAL PROVISIONS

         2.1 LEGENDS. The Holder understands and agrees that, in addition to any
other legends required by applicable law, the certificate or certificates
representing the Common Stock and the Warrants will bear legends substantially
to the effect set forth below and that a stop transfer order may be placed with
respect thereto.

THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR ANY STATE SECURITIES LAWS. THEY MAY NOT BE SOLD, OFFERED FOR SALE,
TRANSFERRED OR ASSIGNED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER SAID ACT AND ANY APPLICABLE STATE SECURITIES LAWS OR PURSUANT TO AN
APPLICABLE EXEMPTION FROM SUCH REGISTRATION REQUIREMENTS.

         2.2 SURVIVAL. The representations, warranties and covenants contained
in this Agreement shall survive the exchange of the Preferred Shares pursuant to
this Agreement.

         2.3 AMENDMENT. This Agreement may be amended, or any provision hereof
may be waived, at any time by an agreement in writing of the parties hereto.

         2.4 ENTIRE AGREEMENT; SUCCESSORS. This Agreement contains the entire
agreement among the parties hereto with respect to the transactions contemplated
hereunder and supersedes all prior arrangements or understandings with respect
thereto, written or oral, other than documents referred to herein. The terms and
conditions of this Agreement shall inure to the benefit of and be binding upon
the parties hereto and their respective successors and permitted assigns.

                                       3
<PAGE>

         2.5 NO ASSIGNMENT. No party hereto may assign any of its rights or
obligations under this Agreement to any other person without the written consent
of the other party.

         2.6 NOTICES. All notices or other communications which are required or
permitted hereunder shall be in writing and sufficient if delivered personally,
by facsimile or sent by overnight express or by registered or certified mail,
postage prepaid, addressed as follows:

         The Holder:

                  c/o Rose Glen Capital Management, L.P.
                  3 Bala Plaza East, Suite 200
                  251 St. Asaphs Road
                  Bala Cynwyd, PA 19004
                  Attn:  Wayne Bloch
                  Facsimile:  610-617-0570

         The Company:

                  Able Telcom Holding Corp.
                  1000 Holcomb Woods Parkway
                  Suite 440
                  Roswell, GA.  30076
                  Attn: President
                  Facsimile: (770) 993-8532

         All such deliveries shall be deemed effective when received by the
person entitled to such receipt or when delivery has been attempted but refused
by such person. Any party may change the person or address to which such
deliveries shall be made with respect to such party by delivering notice thereof
to the other party hereto in accordance with this Section.

         2.7 CAPTIONS. The captions contained in this Agreement are for
reference purposes only and are not part of this Agreement.

         2.8 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, and each such counterpart shall be deemed to be an original
instrument, but all such counterparts together shall constitute but one
agreement.

         2.9 GOVERNING LAW AND VENUE. The validity, interpretation, construction
and performance of this Agreement shall be governed by the laws of the State of
New York applicable to agreements made and entirely to be performed within such
jurisdiction. The party bringing any action under this Agreement shall only be
entitled to choose the federal or state courts in the State of New York as the
venue for such action, and each party consents to the jurisdiction of the court
chosen in such manner for such action.

         2.10 FURTHER ASSURANCES. Subject to the terms and conditions herein
provided, each of the parties hereto shall use reasonable efforts to take, or
cause to be taken, such action, to execute and deliver, or cause to be executed
and delivered, such additional documents and instruments and to do, or cause to
be done, all things necessary, proper or advisable under the provisions of this

                                       4
<PAGE>

Agreement and under applicable law to consummate and make effective the
transactions contemplated by this Agreement.

                                       5
<PAGE>

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

                                    HOLDER:

                                    RGC INTERNATIONAL INVESTORS, LDC
                                         By: Rose Glen Capital Management, L.P.
                                         Investment Manager
                                              By: RGC General Partner Corp, as
                                              General Partner

                                           _____________________________________
                                           By:      Wayne D. Bloch
                                           Title:   Managing Director

                                    ABLE TELCOM HOLDING CORP.

                                    By:_________________________________________

                                    Name:_______________________________________

                                    Title:______________________________________

                                       6
<PAGE>

                                    EXHIBIT B
                          COMMON STOCK PURCHASE WARRANT

                                       7

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