Document:

<PAGE>

                                                                    EXHIBIT 10.8

                                    August 1, 2000

The Persons Listed on Exhibit A Hereto

     Re:  Shareholders' Agreement, Dated as of March 30, 2000, (as amended to
          date), by and among MIND C.T.I. Ltd. (the "Company") and the
          "Shareholders" as defined therein (the "Shareholders'
                                    -----------------------------------------
          Agreement")
          -------------------------------------------------------------------

Ladies and Gentlemen:

          This will confirm that, from and after the closing of the proposed
initial public offering of the ordinary shares of the Company, the undersigned
hereby waive any rights they have under Section 4 of the Shareholders' Agreement
with respect to any sales of ordinary shares by Non-Investor Shareholders, other
than sales by Monica Eisinger, Lior Salansky, and their respective Permitted
Transferees.  Nothing herein shall affect the rights of any of the undersigned
contained in Section 4 of the Shareholders' Agreement with respect to sales of
ordinary shares by Monica Eisinger, Lior Salansky or their respective Permitted
Transferees.  Capitalized words used as defined terms herein and not otherwise
defined shall have the meanings ascribed thereto in the Shareholders' Agreement.

                              /s/ Monica Eisinger
                              ____________________________
                              Monica Eisinger

                              /s/ Lior Salansky
                              ____________________________
                              Lior Salansky

                              ADC Teledata Communications Ltd.

                                  /s/ Ilan Melamed
                              By: __________________________
                                  Name: Ilan Melamed
                                  Title: Chief Executive Officer
<PAGE>

                              Summit Ventures V, L.P.

                              By:  Summit Partners V, L.P.,
                              its General Partner

                              By:  Summit Partners, LLC,
                              its General Partner

                                  /s/ Kevin Mohan
                              By: ---------------------------
                                  Member

                              Summit V Companion Fund, L.P.

                              By:  Summit Partners V, L.P.,
                              its General Partner

                              By:  Summit Partners, LLC,
                              its General Partner

                                  /s/ Kevin Mohan
                              By: ---------------------------
                                  Member

                              Summit V Advisors Fund, L.P.

                              By:  Summit Partners, LLC,
                              its General Partner

                                  /s/ Kevin Mohan
                              By: ---------------------------
                                  Member

                              Summit V Advisors Fund (QP), L.P.

                              By:  Summit Partners, LLC,
                              its General Partner

                                  /s/ Kevin Mohan
                              By: ---------------------------
                                  Member
<PAGE>

                              Summit Investors III, L.P.

                                  /s/ Kevin Mohan
                              By: __________________________
                                  Name: Kevin Mohan
                                  Title: General Partner

                              Oscar Gruss & Son Incorporated

                                  /s/ Michael Shaoul
                              By: __________________________
                                  Name: Michael Shaoul
                                  Title: Executive Vice President
<PAGE>

                                   Exhibit A
                                   ---------

MIND C.T.I. Ltd.

Summit Ventures V, L.P.
Summit V Companion Fund, L.P.
Summit V Advisors Fund, L.P.
Summit V Advisors Fund (QP), L.P.
Summit Investors III, L.P.

Oscar Gruss & Son Incorporated

Monica Eisinger

Lior Salansky

ADC Teledata Communications Ltd.

Zeev Braude

MIND Israel Ltd.

Avshalom Radzinsky

Rafael Newman

Izik Ben Zaken

Idit Maor

Shai Weisberg<PAGE>

                                                                    EXHIBIT 10.9

                                MIND C.T.I. LTD.

                              Amendment Agreement
                              -------------------

     This Amendment Agreement, dated as of July 10, 2000, among MIND C.T.I. Ltd.
(the "Company") and the shareholders named on the signature pages hereof.

                              W I T N E S S E T H:

    WHEREAS,  the Company is party to a Shareholders' Agreement, dated as of
March 30, 2000, with the shareholders named therein (the "Shareholders'
Agreement");

    WHEREAS, the Company is party to a Registration Rights Agreement, dated as
of March 30, 2000, with the shareholders named therein (the "Registration Rights
Agreement"); and

    WHEREAS, in light of the Company's proposed initial public offering of
shares on The Nasdaq Stock Market,  the Company and the undersigned desire to
amend the Shareholders' Agreement and the Registration Rights Agreements as set
forth herein.

    NOW, THEREFORE, the parties hereto hereby agree as follows:

1.  Defined Terms
    -------------

    Capitalized terms used but not defined herein shall have the respective
meanings assigned thereto in the Shareholders' Agreement or the Registration
Rights Agreement, as the case may be.

2.  Amendment to Shareholders Agreement
    -----------------------------------

    The first proviso of Section 9 of the Shareholders' Agreement is hereby
amended and replaced in its entirety with the following:  "provided, however,
that the provisions of Section 4 hereof shall survive the consummation of a
Qualified Public Offering only with respect to any sales of securities
undertaken by a Non-Investor Shareholder (other than ADC) which are not
consummated utilizing a public market".  For the avoidance of doubt, it is
hereby acknowledged that the provisions of Sections 3 and 4(d) of the
Shareholders' Agreement shall terminate upon the consummation of a Qualified
Public Offering.

3.  Amendment to Registration Rights Agreement
    ------------------------------------------

    Section 15(a) of the Registration Rights Agreement is hereby amended by
deleting the parenthetical clause contained therein and by adding the following
to the end thereof:

<PAGE>

       Any of the Holders may assign its rights and obligations pursuant to this
       Agreement to a transferee of all or any part of its Registrable
       Securities, provided that the transferor shall, within fourteen (14) days
       after such transfer (or fourteen (14) days after the date hereof, with
       respect to transfers that have occurred prior to the date hereof),
       furnish the Company with written notice of the name and address of such
       transferee and the securities with respect to which such registration
       rights are being assigned and the transferee's written agreement to be
       bound by this Agreement.

                        [SIGNATURES BEGIN ON NEXT PAGE]

                                       2
<PAGE>

    IN WITNESS WHEREOF, this Agreement has been executed as of the date and year
first above written.

                              MIND C.T.I. LTD.

                                  /s/ Monica Eisinger
                              By: _____________________
                                  Name: Monica Eisinger
                                  Title: President

                              /s/ Monica Eisinger
                              ________________________
                              Monica Eisinger

                              /s/ Lior Salansky
                              ________________________
                              Lior Salansky

                              ADC TELEDATA
                              COMMUNICATIONS LTD.

                                  /s/ Ilan Melamed
                              By: ______________________
                                  Name: Ilan Melamed
                                  Title: Chief Executive Officer

                              /s/ Zeev Braude
                              _________________________
                              Zeev Braude

                                       3
<PAGE>

                               MIND ISRAEL LTD.

                                   /s/ Monica Eisinger
                               By: _____________________
                                   Name: Monica Eisinger
                                   Title: President

                               /s/ Avshalon Radzinsky
                               ________________________
                               Avshalon Radzinsky

                               /s/ Rafael Newman
                               ________________________
                               Rafael Newman

                               /s/ Izik Ben Zaken
                               ________________________
                               Izik Ben Zaken

                               /s/ Idit Maor
                               ________________________
                               Idit Maor

                               /s/ Shai Wesberg
                               ________________________
                               Shai Wesberg

                               SUMMIT VENTURES V, L.P.

                               By: Summit Partners V, L.P.,
                                   its General Partner

                               By: Summit Partners, LLC,
                                   its General Partner

                                   /s/ Kevin Mohan
                               By: ____________________
                                   Member

                                       4
<PAGE>

                              SUMMIT COMPANION FUND, L.P.

                              By: Summit Partners V, L.P.,
                                  its General Partner

                              By: Summit Partners, LLC,
                                  its General Partner

                                  /s/ Kevin Mohan
                              By: ______________________
                                  Member

                                       5
<PAGE>

                              SUMMIT V ADVISORS FUND, L.P.

                              By: Summit Partners, LLC
                                  its General Partner

                                  /s/ Kevin Mohan
                              By: ______________________
                                  Member

                              SUMMIT V ADVISORS FUND (QP), L.P.

                              By: Summit Partners, LLC,
                                  its General Partner

                                  /s/ Kevin Mohan
                              By: ______________________
                                  Member

                              SUMMIT INVESTORS III, L.P.

                                  /s/ Kevin Mohan
                              By: ______________________
                                  General Partner

                              OSCAR GRUSS & SON INCORPORATED

                                  /s/ Michael Shaoul
                              By: ______________________
                                  Name: Michael Shaoul
                                  Title: Executive Vice President

                                       6

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