EXHIBIT 10.1

                                SEVENTH AMENDMENT
                     TO ADDITIONAL SENIOR SECURITY AGREEMENT


      SEVENTH AMENDMENT,  dated AS OF April 20, 2006 (the  "Amendment"),  to the
Additional Senior Security Agreement referred to below, by and among (i) GENERAL
DATACOMM INDUSTRIES,  INC., a Delaware  corporation,  GENERAL DATACOMM,  INC., a
Delaware   corporation  ("GDC"),   DATACOMM  LEASING  CORPORATION,   a  Delaware
corporation, GDC HOLDING COMPANY, LLC, a Delaware limited liability company, GDC
NAUGATUCK,  INC., a Delaware corporation,  GDC FEDERAL SYSTEMS, INC., a Delaware
corporation,  GDC REALTY,  INC., a Texas  corporation  (each,  a "Borrower"  and
collectively,  the "Debtors") and Howard S. Modlin ("Modlin") and John L. Segall
(together with their successors and assigns the "Secured Party")

      WHEREAS,  the Debtors are obligated to repay certain indebtedness owing to
Ableco Finance LLC as Agent and the Lenders under that certain Loan and Security
Agreement  dated as of August 20, 2002 (as amended,  supplemented  and otherwise
modified from time to time, the " Senior Loan Agreement");

      WHEREAS, GDC and the other Debtors have requested that Modlin as a Secured
Party  change the terms of a demand loan made on February 17, 2006 in the amount
of $250,000 which was used to replace  $250,000 of the  obligations  owed to the
Lenders under the Senior Loan  Agreement to a term loan,  fifty percent (50%) of
which shall be payable one year from  February 17, 2006 and fifty  percent (50%)
of which shall be payable two years from  February  17, 2006 as  reflected by an
Additional  Amended and  Restated  Note (the  "Additional  Amended and  Restated
Note")  subject to (i) the  execution  and  delivery  of this  Amendment  by the
Debtors, and (ii) the other terms and conditions set forth in this Amendment;

      NOW  THEREFORE,  in  consideration  of the  premises  and  other  good and
valuable consideration, the parties hereto hereby agree as follows:


      1.  Definitions  in Amendment.  Any  capitalized  term used herein and not
defined shall have the meaning assigned to it in the Additional  Senior Security
Agreement  dated  December 30, 2003 between the Debtors and the Secured Party as
heretofore amended ( the "Security Agreement").

      2.  Replacement  Note. The Additional  Amended and Restated Note including
accrued  interest  shall be deemed a Note and  Indebtedness  under the  Security
Agreement.

      3. Indebtedness  Secured.  Paragraph 3 of the Security  Agreement entitled
"Indebtedness  Secured" is amended by replacing the last sentence thereof in its
entirety by the following new sentence "The Security Interest granted by Debtors
secures  payment  of any and all  indebtedness  of Parent  and its  subsidiaries
incurred  under the Amended and Restated  Notes and the  Additional  Amended and
Restated  Note payable to Modlin as a Secured  Party dated April 20, 2006 in the
original  principal  amount of $250,000  and which notes total  $1,850,000  plus
accrued interest (the "Notes.")



      4. Miscellaneous.

            (a)  Continued  Effectiveness  of  Security  Agreement.   Except  as
otherwise  expressly  provided herein,  the Security Agreement shall continue to
be, in full  force  and  effect  and is hereby  ratified  and  confirmed  in all
respects.  Except as expressly  provided  herein,  the  execution,  delivery and
effectiveness  of this Amendment  shall not constitute an amendment of any other
provision of the Security Agreement.

            (b)  Counterparts.  This  Amendment may be executed in any number of
counterparts and by different parties hereto in separate  counterparts,  each of
which shall be deemed to be an original,  but all of which taken  together shall
constitute one and the same agreement.

            (c) Headings.  Section  headings herein are included for convenience
of  reference  only and shall not  constitute a part of this  Amendment  for any
other purpose.

            (d)  Governing  Law.  This  Amendment  shall  be  governed  by,  and
construed in accordance with, the law of the State of New York.

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

                                            Borrowers:


                                            GENERAL DATACOMM INDUSTRIES, INC.
                                            a Delaware corporation


                                           By
                                             -----------------------------------

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


                                            GENERAL DATACOMM, INC.,
                                            a Delaware corporation

                                            By
                                              ----------------------------------

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






                                            DATACOMM LEASING CORPORATION,
                                            a Delaware corporation


                                            By
                                              ----------------------------------

                                            Title:      Vice President

                                            GDC HOLDING COMPANY, LLC,
                                            a Delaware limited liability company


                                            By
                                              ----------------------------------

                                            Title:   Vice President

                                            GDC FEDERAL SYSTEMS, INC.,
                                            a Delaware corporation


                                            By
                                              ----------------------------------

                                            Title:   Vice President

                                            GDC NAUGATUCK, INC.,
                                            a Delaware corporation


                                            By
                                              ----------------------------------

                                            Title:            Vice President


                                            GDC REALTY, INC.,
                                            a Texas corporation


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

                                            Secured Party

                                            ------------------------------------
                                            Howard S. Modlin

                                            ------------------------------------
                                            John L. Segall