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                                                                     EXHIBIT 3.3

               AMENDED AND RESTATED CERTIFICATE OF INCORPORATION
                             OF QUINTUS CORPORATION
                             A DELAWARE CORPORATION

               The undersigned, Alan K. Anderson, hereby certifies that:

               ONE: He is the duly elected and acting Chief Executive Officer of
the corporation.

               TWO: The name of the corporation is Quintus Corporation and that
the corporation was originally incorporated on June 11, 1990 under the name
QTNEWCO, INC. pursuant to the General Corporation Law of the State of Delaware.

               THREE: Pursuant to Section 242 and Section 245 of the General
Corporation Law of the State of Delaware, Quintus Corporation has adopted this
Amended and Restated Certificate of Incorporation, restating, integrating and
further amending its Restated Certificate of Incorporation dated on or about
August 24, 1999, which Amended and Restated Certificate of Incorporation has
been duly proposed by the directors and adopted by the stockholders of this
corporation (by written consent pursuant to Section 228 of said General
Corporate Law) in accordance with the provisions of said Section 242 and Section
245.

               FOUR: The Amended and Restated Certificate of Incorporation of
said corporation shall be amended and restated to read in full as follows:

                                    ARTICLE I

               The name of this corporation is Quintus Corporation.

                                   ARTICLE II

               The address of the registered office of this corporation in the
State of Delaware is Corporation Trust Center, 1209 Orange Street in the City of
Wilmington, County of New Castle, Delaware 19801. The name of its registered
agent at such address is The Corporation Trust Company.

                                   ARTICLE III

               The nature of the business or purposes to be conducted or
promoted is to engage in any lawful act or activity for which corporations may
be organized under the General Corporation Law of Delaware.

                                   ARTICLE IV

               This corporation is authorized to issue two classes of stock to
be designated, respectively, "Common Stock" and "Preferred Stock." The total
number of shares that this corporation is authorized to issue is one hundred ten
million (110,000,000) shares. One hundred


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million (100,000,000) shares shall be Common Stock, par value $0.001 per share,
and ten million (10,000,000) shares shall be Preferred Stock, par value $0.001
per share.

               The Preferred Stock may be issued from time to time in one or
more series, without further stockholder approval. The Board of Directors is
hereby authorized, in the resolution or resolutions adopted by the Board of
Directors providing for the issuance of any wholly unissued series of Preferred
Stock, within the limitations and restrictions stated in this Amended and
Restated Certificate of Incorporation (the "Restated Certificate"), to fix or
alter the dividend rights, dividend rate, conversion rights, voting rights,
rights and terms of redemption (including sinking fund provisions), the
redemption price or prices, and the liquidation preferences of any wholly
unissued series of Preferred Stock, and the number of shares constituting any
such series and the designation thereof, or any of them, and to increase or
decrease the number of shares of any series subsequent to the issue of shares of
that series, but not below the number of shares of such series then outstanding.
In case the number of shares of any series shall be so decreased, the shares
constituting such decrease shall resume the status that they had prior to the
adoption of the resolution originally fixing the number of shares of such
series.

                                    ARTICLE V

               Except as otherwise provided in this Restated Certificate, in
furtherance and not in limitation of the powers conferred by statute, the Board
of Directors is expressly authorized to make, repeal, alter, amend and rescind
any or all of the Bylaws of this corporation.

                                   ARTICLE VI

               The number of directors of this corporation shall be fixed from
time to time by a bylaw or amendment thereof duly adopted by the Board of
Directors or by the stockholders.

                                   ARTICLE VII

               Elections of directors need not be by written ballot unless the
Bylaws of this corporation shall so provide.

                                  ARTICLE VIII

               Except as otherwise provided in this Restated Certificate, any
action required or permitted to be taken by the stockholders of the Corporation
must be effected at an annual or special meeting of the stockholders of the
Corporation, and no action required to be taken or that may be taken at any
annual or special meeting of the stockholders of the Corporation may be taken by
written consent.

                                   ARTICLE IX

               A director of this corporation shall, to the full extent
permitted by the Delaware General Corporation Law as it now exists or as it may
hereafter be amended, not be liable to this


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corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director. Neither any amendment nor repeal of this Article IX, nor the
adoption of any provision of this Restated Certificate of Incorporation
inconsistent with this Article IX, shall eliminate or reduce the effect of this
Article IX in respect of any matter occurring, or any cause of action, suit or
claim that, but for this Article IX, would accrue or arise, prior to such
amendment, repeal or adoption of an inconsistent provision.

                                    ARTICLE X

               This corporation reserves the right to amend, alter, change or
repeal any provision contained in this Restated Certificate, in the manner now
or hereafter prescribed by statute, and all rights conferred upon stockholders
herein are granted subject to this reservation.

                                   ARTICLE XI

               To the fullest extent permitted by applicable law, the
Corporation is authorized to provide indemnification of (and advancement of
expenses to) agents of the Corporation (and any other persons to which General
Corporation Law permits the Corporation to provide indemnification) through
bylaw provisions, agreements with such agents or other persons, vote of
stockholders or disinterested directors or otherwise, in excess of the
indemnification and advancement otherwise permitted by Section 145 of the
General Corporation Law, subject only to limits created by applicable General
Corporation Law (statutory or non-statutory), with respect to actions for breach
of duty to the Corporation, its stockholders, and others.

               Any amendment, repeal or modification of the foregoing provisions
of this Article XI shall not adversely affect any right or protection of a
director, officer, agent, or other person existing at the time of, or increase
the liability of any director of the Corporation with respect to, any acts or
omissions of such director, officer or agent occurring prior to such amendment,
repeal or modification.

                                      * * *

               FIVE: That thereafter said amendment and restatement was duly
adopted in accordance with the provisions of Section 242 and Section 245 of the
General Corporation Law by obtaining the vote of the holders of the majority of
the outstanding stock of the corporation in favor of said amendment and
restatement in the manner set forth in Section 228 of the General Corporation
Law.



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               IN WITNESS WHEREOF, the undersigned have executed this
certificate on _______________, 1999.



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                                     Alan K. Anderson, Chief Executive Officer