Document:

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                                                                    Exhibit 10.4

                              ASSUMPTION AGREEMENT

         This ASSUMPTION AGREEMENT (this "Agreement"), dated as of May 2, 2000,
is executed and delivered by INTERLOGIX, INC., a Delaware corporation (formerly
known as ITI TECHNOLOGIES, INC.) ("INTERLOGIX") and PNC BANK, NATIONAL
ASSOCIATION, as administrative agent (the "Administrative Agent") for the
Lenders (defined below).

                                   WITNESSETH:

         WHEREAS, pursuant to a Credit Agreement, dated as of November 17, 1999
(as amended, supplemented, amended and restated or otherwise modified from time
to time, the "Credit Agreement") among SLC Technologies, INC., a Delaware
corporation (the "Borrower") , the various financial institutions as are, or may
from time to time become, parties thereto (collectively, the "Lenders"), and the
Administrative Agent for the Lenders, the Lenders have extended Commitments
(such capitalized term and the other terms used herein to have the meanings
provided in Article I below) to make Credit Extensions to the Borrower on or
after the Merger Date;

         WHEREAS, upon consummation of the Merger, INTERLOGIX is required to
assume each and every obligation of the Borrower under the Credit Agreement,
each other Loan Document and each other document and agreement entered into in
connection therewith, and to execute and deliver this Agreement; and

         WHEREAS, INTERLOGIX has duly authorized the execution, delivery and
performance of this Agreement;

         NOW THEREFORE, for good and valuable consideration, the receipt of
which is hereby acknowledged by INTERLOGIX, and to induce the Lenders to make
Credit Extensions to INTERLOGIX pursuant to the Credit Agreement, INTERLOGIX
agrees with the Administrative Agent for the benefit of all the Lenders as
follows:

                                   ARTICLE I
                                   DEFINITIONS

         Section 1.1. Certain Terms. The following terms (whether or not
underscored) when used in this Agreement, including its preamble and recitals,
shall have the following meanings (such definitions to be equally applicable to
the singular and plural forms thereof)

         "Administrative Agent" is defined in the preamble.

         "Agreement" is defined in the preamble.

         "Borrower" is defined in the first recital.
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         "Credit Agreement" is defined in the first recital.

         "Lenders" is defined in the first recital.

         Section 1.2. Credit Agreement Definitions. Unless otherwise defined
herein or the context otherwise requires, terms for which meanings are provided
in the Credit Agreement are used in this Agreement, and its preamble and
recitals, with such meanings.

                                   ARTICLE II
                                   ASSUMPTION

         Section 2.1. Assumption of Obligations. Effective as of the Merger
Effective Time, INTERLOGIX, as the successor in interest to the Borrower, hereby

              (a) assumes (by operation of law and pursuant to this Agreement)
         and agrees to be bound by, perform, observe, and hereby confirms each
         and every covenant, agreement, term, condition, obligation,
         appointment, duty and liability of the Borrower under and with respect
         to the Credit Agreement, each other Loan Document and each other
         document and agreement entered into in connection therewith;

              (b) accepts and assumes all liabilities of the Borrower related to
         any representation or warranty made by, and all rights and powers of
         the Borrower under or in connection with, the Credit Agreement, each
         other Loan Document and each other document and agreement entered into
         in connection therewith, and confirms and restates all such
         representations and warranties;

              (c) confirms and acknowledges that it is the "Borrower" referred
         to in the Credit Agreement, each other Loan Document and each other
         document and agreement entered into in connection therewith that was
         executed and delivered by the Borrower, and hereby agrees to perform
         and observe all the covenants, agreements, terms, conditions,
         obligations, appointments, duties and liabilities of the Borrower under
         the Credit Agreement, each other Loan Document and each other document
         and agreement entered into in connection therewith that was executed
         and delivered by the Borrower, as if it had been the "Borrower"
         thereunder from the original execution and delivery thereof;

              (d) confirms and agrees that it possesses all the rights,
         privileges, powers and franchises (both public and private), and is
         subject to all the restrictions, disabilities and duties of the
         Borrower, and that the rights of the Lenders under the Credit Agreement
         and each other Loan Document shall be unimpaired and remain in full
         force and effect and are hereby ratified and confirmed in all respects;
         and

              (e) confirms and acknowledges that (i) INTERLOGIX is a corporation
         duly incorporated and validly existing in good standing under the laws
         of the State of Delaware, (ii) the Borrower had (A) all requisite power
         and authority to enter into the Merger and to authorize the assumption
         of the rights and obligations in connection therewith and (B) duly
         authorized the Merger and the assumption of rights and obligations in
         connection therewith, (iii) the consummation of the Merger and the

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         assumption by INTERLOGIX of all the rights and obligations of the
         Borrower will not violate or result in a default under any applicable
         laws, rules or regulations or material agreements (except as set forth
         in the Credit Agreement), orders or judgments binding on or applicable
         to the Borrower, and (v) the Credit Agreement, each other Loan Document
         and each other document and agreement entered into in connection
         therewith is in full force and effect and binding and enforceable
         against INTERLOGIX in accordance with their applicable terms (in each
         case, subject to the effects of bankruptcy, insolvency, fraudulent
         conveyance, reorganization, moratorium and other similar laws relating
         to or affecting creditors' rights generally, general equitable
         principles (whether considered in a proceeding in equity or at law) and
         an implied covenant of good faith and fair dealing).

                                  ARTICLE III
                                 MISCELLANEOUS

         Section 3.1. Further Assurances. Without limitation to the other terms
and provisions of this Agreement, INTERLOGIX agrees to execute and deliver, from
time to time, such documents or agreements as the Administrative Agent may
reasonably request to give effect to the terms of this Agreement.

         Section 3.2. Loan Document. This Agreement is a Loan Document executed
pursuant to the Credit Agreement, and shall be administered, construed and
applied in accordance with the terms and provisions thereof, including Article X
thereof.

         Section 3.3. Successors and Assigns; Benefits. This Agreement shall be
binding upon INTERLOGIX and its successors and assigns and shall inure to the
benefit of each of the Lenders, the Administrative Agent and each of their
respective successors and assigns.

         Section 3.4. Counterparts. This Agreement may be executed in any number
of counterparts, each of which shall be an original and all of which when taken
together shall constitute one and the same agreement.

         Section 3.5. Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK.

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         IN WITNESS WHEREOF, each of the undersigned has caused this Agreement
to be executed by its duly authorized officer as of the date and year first
above written.

                                       INTERLOGIX, INC.

                                       By
                                         ---------------------------------------
                                            Name:
                                            Title:

                                       PNC BANK, NATIONAL ASSOCIATION,
                                           as Administrative Agent

                                       By
                                         ---------------------------------------
                                            Name:
                                            Title:

                             [ASSUMPTION AGREEMENT]
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         IN WITNESS WHEREOF, each of the undersigned has caused this Agreement
to be executed by its duly authorized officer as of the date and year first
above written.

                                       INTERLOGIX, INC.

                                       By /s/ Kenneth L. Boyda
                                          --------------------
                                           Name:   Kenneth L. Boyda
                                           Title:  President & CEO

                                       PNC BANK, NATIONAL ASSOCIATION,
                                          as Administrative Agent

                                       By /s/ Amy T. Petersen
                                          -------------------
                                           Name:     Amy T. Petersen
                                           Title:    Vice PresidentExhibit 10.7.2

                    SECOND AMENDMENT TO THE CREDIT AGREEMENT

     SECOND   AMENDMENT,   dated  as  of  April  27,  2000  (this   "Second
Amendment"),  to the  Credit  Agreement,  dated  as of July  23,  1997  (as
amended,  supplemented,  or  otherwise  modified  from  time to  time,  the
("Credit  Agreement"),  among  COMMSCOPE,  INC. OF NORTH CAROLINA,  a North
Carolina  corporation  (the  ("Company"),  the several lenders from time to
time parties  thereto (the "Banks"),  THE CHASE  MANHATTAN BANK, a New York
banking  corporation,  as  administrative  agent  for the  Banks  (in  such
capacity, the "Administrative Agent"), and the financial institutions named
therein as co-agents  for the Banks (in such  capacity,  collectively,  the
"Co-Agents"; each, individually, a ("Co-Agent").

                                WITNESSETH:

     WHEREAS, the Company, the Banks, the Administrative Agent and the Co-Agents
are parties to the Credit Agreement;

     WHEREAS,  the  Company  has  requested  that the  Banks  amend  the  Credit
Agreement as set forth herein;

     WHEREAS,  the Banks,  the  Administrative  Agent and the Co-Agents are
willing to agree to such amendment to the Credit Agreement,  subject to the
terms and conditions set forth herein;

     NOW, THEREFORE,  in consideration of the premises and mutual covenants
contained herein, the Company,  the Banks, the Administrative Agent and the
Co-Agents hereby agree as follows:

     1. Defined Terms. Unless otherwise defined herein,  capitalized terms which
are defined in the Credit  Agreement  are  used herein as therein
defined.

     2. Amendments  to Credit  Agreement.  (a)  Subsection  7.15 of  the  Credit
Agreement  is amended by (i) deleting the word "and" from the end of clause (e),
(ii) deleting the period at the end of clause (f) and substituting  therefor the
phrase ";and" and (iii) adding thereto the following new clause (g):

        (g)  Indebtedness of the Company to Holdings  representing the loan
        by Holdings to the Company of the proceeds of the  Holdings  Senior
        Subordinated Notes.

     (b)  Paragraph  (j) of  Section 8 of the  Credit  Agreement  is hereby
amended by (i) deleting the word "or" from the end of clause (iii)  thereof
and substituting therefor a comma and (ii) deleting the phrase; "or" at the
end of clause (iv) and  substituting  therefor the  following:  or (iv) the
loan by  Holdings to the Company of the  proceeds  of the  Holdings  Senior
Subordinated Notes; or

<PAGE>

     3.  Representations  and  Warranties.  The  Company  hereby  confirms,
reaffirms  and restates the  representations  and  warranties  set forth in
Section 4 of the Credit Agreement, as amended by this Second Amendment. The
Company  represents and warrants  that,  after giving effect to this Second
Amendment, no Default or Event of Default has occurred and is continuing.

     4.  Effectiveness.   Upon  receipt  by  the  Administrative  Agent  of
counterparts  of  this  Second  Amendment  duly  executed  by the  Company,
Holdings  and the  Required  Banks,  this  Second  Amendment  shall  become
effective  as of the date of  receipt by the  Administrative  Agent of such
counterparts (the "Effective Date").

     5. Continuing  Effect of the Credit  Agreement.  This Second Amendment
shall not  constitute  an  amendment  of any other  provision of the Credit
Agreement not expressly  referred to herein and shall not be construed as a
waiver  or  consent  to any  further  or  future  action on the part of the
Company  that  would  require  a  waiver  or  consent  of  the  Banks,  the
Administrative Agent or the Co-Agents.  Except as expressly amended hereby,
the  provisions of the Credit  Agreement are and shall remain in full force
and effect.

     6.  Counterparts.  This  Second  Amendment  may be  executed by the parties
hereto  in  any   number  of   separate   counterparts   (including   telecopied
counterparts), each of which shall be deemed to be an original, and all of which
taken together shall be deemed to constitute one and the same instrument.

     7. GOVERNING LAW. THIS SECOND AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED
AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

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<PAGE>

     IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  Second
Amendment to be duly executed and delivered in New York,  New York by their
respective proper and duly authorized officers as of the day and year first
above written.

            COMMSCOPE, INC. OF NORTH CAROLINA

            By: /s/Barry D. Graham

                ----------------------------------------------------------------
                      Title:Treasurer

            THE CHASE MANHATTAN BANK, as
            Administrative Agent, as a Co-Agent
            and as a Bank

            By: /s/Steven J. Faliski

                ----------------------------------------------------------------
                      Title: Vice President

            BANK OF AMERICA, NA, as a Co-Agent and as a Bank

            By: /s/Adam Kaplan

                ----------------------------------------------------------------
                      Title: Vice President

            FLEET NATIONAL BANK F.K.A. BANKBOSTON, N.A., as a Co-Agent and as a
            Bank

            By: /s/Deanne M. Horn

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                      Title: Vice President

            BANK OF TOKYO-MITSUBISHI TRUST COMPANY, as a Co-Agent and as a Bank

            By: /s/R. Glass

                ----------------------------------------------------------------
                      Title: Vice President

                                     3

<PAGE>

            CREDIT LYONNAIS NEW YORK BRANCH, as a Co-Agent and as a Bank

            By: /s/Stephen M. Prosel

                ----------------------------------------------------------------
                  Title: First Vice President and Manager

            FIRST UNION NATIONAL BANK, as a Co-Agent and as a Bank

            By: /s/Frederick E. Blumer

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                      Title: Vice President

            TORONTO DOMINION (NEW YORK) INC., as a Co-Agent and as a Bank

            By: /s/Jorge A. Garcia

                ----------------------------------------------------------------
                      Title: Vice President

            WACHOVIA BANK, N.A., as a Co-Agent and as a Bank

            By: /s/Christopher L. Fincher

                ----------------------------------------------------------------
                      Title: Senior Vice President

            CREDIT AGRICOLE INDOSUEZ

            By: /s/Michael R. Quiray

                ----------------------------------------------------------------
                      Title: Vice President, Senior Relationship Manager

            By: /s/Patrick Cocquerel

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                      Title: First Vice President, Managing Director

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<PAGE>

            COMERZBANK, AG, NEW YORK AND GRAND CAYMAN BRANCHES

            By: /s/Harry P. Yergey

                ----------------------------------------------------------------
                       Title: Vice President

            By: /s/Subash Visuranathan

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                       Title: Vice President

            FLEET NATIONAL BANK

            By: /s/Deanne M. Horn

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                       Title: Vice President

            SCOTIABANC INC.

            By: /s/William E. Zarrett

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                        Title: Managing Director

            THE SUMITOMO BANK, LTD.

            By: /s/Peter Knight

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                        Title: Senior Vice President

            STB DELAWARE FUNDING TRUST I

            By: /s/Donald C. Harganon

                ----------------------------------------------------------------
                        Title: Vice President

            THE TOKAI BANK, LTD., NEW YORK BRANCH

            By: /s/Shinichi Natkatani

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                      Title: Assistant General Manager

            GENERAL ELECTRIC CAPITAL CORPORATION

            By: /s/Gregory Hong

                ----------------------------------------------------------------
                      Title: Duly Authorized Signatory

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<PAGE>

The  undersigned  agrees  to  the  foregoing  Second  Amendment  and to its
obligations thereunder and confirms that its obligations under the Holdings
Guarantee remain in full force and effect:

COMMSCOPE, INC.

By: /s/Barry D. Graham

    --------------------------------------
    Title: Treasurer

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