Document:

EXHIBIT 4.3.1

                                    SPECIMEN

  NUMBER                 INCORPORATED UNDER THE LAWS OF                 SHARES
PB                            THE STATE OF FLORIDA                   Preferred B

                           Able Telcom Holding Corp.

                            Series B Preferred Stock

This Certifies that ___________________________________________________ is the
registered holder of __________________________________________________ Shares

transferable only on the books of the Corporation by the holder hereof in person
or by Attorney upon surrender of this Certificate properly endorsed.

         In Witness Whereof, the said Corporation has caused this Certificate to
be signed by its duly authorized officers and its Corporate Seal to be hereunto
affixed this ___________ day of July A.D. 1998

S/Billy V. Ray, Jr.                                          S/Elizabeth Terrero
-------------------                                          -------------------
     President                                                    SecretaryEXHIBIT 4.3.2

                                    SPECIMEN

  NUMBER                 INCORPORATED UNDER THE LAWS OF                 SHARES
PC                            THE STATE OF FLORIDA                   Preferred C

                           Able Telcom Holding Corp.

                            Series C Preferred Stock

This Certifies that ___________________________________________________ is the
registered holder of __________________________________________________ Shares

transferable only on the books of the Corporation by the holder hereof in person
or by Attorney upon surrender of this Certificate properly endorsed.

         In Witness Whereof, the said Corporation has caused this Certificate to
be signed by its duly authorized officers and its Corporate Seal to be hereunto
affixed this 8th day of February A.D. 2000

S/Billy V. Ray, Jr.                                          S/Elizabeth Terrero
-------------------                                          -------------------
     President                                                    SecretaryEXHIBIT 4.15.1

                                                               February 17, 1999

John Hancock Mutual Life Insurance Company
John Hancock Variable Life Insurance Company
Signature lA (Cayman), Ltd.
200 Clarendon Street
Boston, MA 02117

                  Re: Able Telcom Holding Corp.
                  $10,000,000 12% Senior Subordinated Notes due January 6, 2005.

Gentlemen:

         In connection with our purchase of the above-captioned notes for
consideration of $11,633,333.33 (the "Notes"), we hereby represent and warrant
as follows:

1.       The undersigned understands that the Notes have not been registered
         under the Securities Act of 1933, as amended (the "Act"), and may not
         be sold except pursuant to a duly available exemption from such
         registration requirements.

2.       The undersigned is purchasing the Notes for its own account and not
         with a view to or for sale which would be a violation of the Act. Any
         private resale of the Notes by the undersigned shall only be made to
         purchasers who would have been qualified to purchase the Notes at the
         time of the original private placement.

3.       The undersigned is an "accredited investor," as such term is defined in
         Rule 501(a) of Regulation D under the Act, and has such knowledge and
         experience in financial and business matters that it is capable of
         evaluating the merits and risks of the purchase of the Notes, and has
         concluded that it is able to bear those risks.

4.       The Notes were not offered or sold to the undersigned by any form of
         general solicitation or general advertising.

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5.       The undersigned acknowledges that if any transfer of the Notes is to be
         made in reliance on an exemption under the Act, the issuer of the Notes
         may require an opinion of counsel satisfactory to it that such transfer
         may be made pursuant to an exemption under the act.

6.       In making any subsequent offering or sale of the Notes, the undersigned
         will be acting only for itself and not as part of a sale or planned
         distribution which would be violation of the Act.

7.       The undersigned acknowledges that, so long as appropriate, a legend
         similar to the following may appear on the certificates representing
         the Notes: "These securities have not been registered under the
         Securities Act of 1933 and may be reoffered and sold only if so
         registered or if an exemption for registration is available."

                                                     COTTON COMMUNICATIONS, INC.

                                                     By: /s/TYLER DIXON
                                                         -----------------------
                                                         Title: PresidentEXHIBIT 4.15.2

                                            February 19, 1999

Able Telecom Holding Corp.
1601 Forum Place, Suite 1110
West Palm Beach, Florida 33401
Attn: Billy V. Ray, President

Dear Billy:

         As you are aware, effective February 17, 1999 the undersigned, Cotton
Communications, Inc. ("CC"), purchased all outstanding 12% Senior Subordinated
Notes (the "Notes") of Able Telcom Holding Corp. ("Able") and 2, 785 of the
outstanding shares of Able Series B Preferred Stock. In light of these
transactions, Able and CC hereby agree as follows:

1.       CC hereby waives all outstanding defaults as of the date of this Letter
         under the terms of the Series B Preferred Stock and the Registration
         Rights Agreement related thereto and tinder the Notes and all related
         documentation.

2.       Until March 1, 2000, CC hereby agrees that it will not attempt to
         exercise any default remedy it may have under the terms of the Series B
         Preferred Stock or the Registration Rights Agreement and hereby further
         agrees not to exercise any such default remedy so long as any such
         agreement is in place between Able and any other holder of Series B
         Preferred Stock.

3.       Able and CC hereby amend the terms of the Notes to extend the maturity
         date thereunder to March 1, 2000.

4.       Able and CC hereby agree that, notwithstanding any provision of Able's
         Articles of Incorporation as amended to date or of the purchase
         agreement related to the Series B Preferred Stock, including any
         provision relating to the conversion of the Series B Preferred Stock
         upon the occurrence of any event or default or the failure of Able to
         take any action or to cause any event to occur, the Conversion Price
         for the Series B Preferred Stock held at any time by CC shall not be
         less than $8.25 per share.

5.       In consideration for the agreements by CC set forth in items 1 through
         4 above, Able and CC hereby agree that, to the extent CC is required,
         pursuant to the Securities Purchase Agreement between CC and Halifax
         Fund, L.P., The Gleaneagles Fund Company, Palladin Overseas Fund
         Limited, Colonial Penn Life Insurance Company, Palladin Securities
         L.L.C. and Palladin Partners I, L.P., to purchase any warrants to
         purchase common stock of Able (the "Warrants") the conversion price of
         such Warrants shall automatically upon transfer to CC be reduced to a
         price per share equal to no more than 85% of the closing price of Able

<PAGE>

         common stock on the date prior to such transfer and, if less, to a
         price per share equal to such closing price minus $3.00.

         Please indicate your acceptance of the foregoing by signing in the
space provided below.

                                                      Sincerely,

                                                     COTTON COMMUNICATIONS, INC.

                                                     By: /s/ TYLER DIXON
                                                         -----------------------
                                                     Name: Tyler Dixon
                                                     Title: President

Accepted and agreed this 19th day of February, 1999 ABLE TELECOM HOLDING CORP.

By: /s/ BILLY V. RAY, JR.
    ------------------------------
Name:  Billy V. Ray, Jr.
Title: President & CEOEXHIBIT 4.15.3

                           TERMINATION AGREEMENT

         This Termination Agreement (this " Agreement") is entered into as of
March 22, 1999 by and between ABLE TELECOM HOLDING CORP., a Florida corporation,
(" Able") and COTTON COMMUNICATIONS, INC., a Georgia corporation, ("Cotton").

         WHEREAS, the parties are parties to a Financing Agreement dated
February 17, 1999, a Stock Pledge Agreement dated February 17, 1999 and a
$32,000,000 11.5% Non- Recourse Promissory Note payable by Able in favor of
Cotton dated February 17, 1999 (copies of which are attached hereto as Exhibits
A, B and C respectively) (the "Terminating Agreements");

         WHEREAS, pursuant to the Terminating Agreements, Able loaned Cotton
$32,000,000 which Cotton used to purchase all the Senior Notes, as defined in
the Financing Agreement, and an aggregate of 2,785 shares of Series B Preferred
Stock, as defined in the Financing Agreement; and,

         WHEREAS, the premises upon which the Terminating Agreements were
entered into have changed and in connection therewith the parties have agreed to
terminate the Terminating Agreements;

         NOW, THEREFORE, in consideration of the foregoing premises and of the
mutual promises set forth in this Agreement and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties agree as follows:

1.                TERMINATION OF OBLIGATIONS. The parties agree that the
         Terminating Agreements are hereby terminated as of the date hereof.

2.                ASSUMPTION OF OBLIGATIONS. Able hereby assumes and agrees to
         perform any and a11 obligations of Cotton arising in connection with
         any and all of the Terminating Agreements, and in connection with any
         of the agreements attached to the Terminating Agreements as Exhibits.

3.                ASSIGNMENT AND CANCELLATION OF SENIOR NOTES AND SERIES B
         PREFERRED STOCK.

         Without recourse:

<PAGE>

                  (a) Cotton hereby assigns and transfers to Able all of
Cotton's right, title and interest in and to the Senior Notes and in 2,785
shares of the Series B Preferred Stock and hereby appoints Able or any of its
officers as its attorney-in-fact to do all acts and execute and deliver all
documents necessary to effect such transfer. This appointment of a power and
attorney-in-fact is coupled with an interest and is irrevocable.

                  (b) Able agrees to cancel and mark "paid" the Senior Notes and
redeem and cancel 2,785 shares of t11e Series B Preferred Stock.

4.                INDEMNIFICATION. In the event that Cotton, or its
shareholders, directors, officers or agents (collectively and individually, the
"Indemnified Parties"), become involved in any action, proceeding or
investigation in connection with any matter contemplated by any of the
Terminating Agreements, and any agreement attached as an Exhibit to any
Terminating Agreement, Able shall reimburse the Indemnified Parties for their
reasonable legal and other expenses (including cost of any investigation and
preparation) as they are incurred by the Indemnified Parties.

                  Able shall also indemnify and hold harmless the Indemnified
Parties from and against any and all 1osses, claims, damages and liabilities,
joint or several, related to or arising out of any matters contemplated by any
of the Terminating Agreements and any agreement attached as an Exhibit to any
Terminating Agreement, unless and to the extent that it shall finally be
judicially determined that such losses, claims, damages or liabilities resulted
from the negligence or willful misconduct of the applicable Indemnified Party.

5.                EFFECTIVE DATE. This Agreement shall be effective as of March
22, 1999.

6.                SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon
and shall inure to the benefit of the parties hereto and their respective
successors and assigns.

7.                GOVERNING LAW. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York, without giving
effect to the principles of conflicts of law.

8.                COUNTERPARTS. This Agreement may be executed in counterparts,
each of which shall constitute an original and all of which, taken together,
shall constitute one and the same instrument.

9.                SECTIONS AND HEADINGS. The division of this Agreement into
sections and the insertion of headings are for reference purposes only and shall
not affect the interpretation of this Agreement

                            [SIGNATURE PAGE FOLLOWS]

                                       2
<PAGE>

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

                                            ABLE TELCOM HOLDING CORP.

                                            By:  /s/ BILLY V. RAY
                                                 ----------------------------
                                            Name:
                                            Title:

                                            COTTON COMMUNICATIONS, INC.

                                            By:  /s/ TYLER DIXON
                                                 ---------------
                                            Name: Tyler Dixon
                                            Title: President

                                       3
<PAGE>

                                    EXHIBIT A

         Financing Agreement by and between Able Telecom Holding Corp. and
Cotton Communications, Inc. dated February 17,1999.

                                       4
<PAGE>

                                    EXHIBIT B

         $32,000,000 11.5% Non-Recourse Promissory Note by and between Able
Telecom Holding Corp. and Cotton Communications, Inc. dated February 17, 1999.

                                       5
<PAGE>

                                    EXHIBIT C

         Stock Pledge Agreement by and between Able Telecom Holding Corp. and
Cotton Communications, Inc. dated February 17, 1999.

                                       6

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