ZWEIG DIMENNA PARTNERS L P
SC 13D/A, 1997-12-02
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549
                                 SCHEDULE 13D

                   UNDER THE SECURITIES EXCHANGE ACT OF 1934

                              (AMENDMENT NO. 2)*


                         Premisys Communications, Inc.
         -------------------------------------------------------------
                                (Name of Issuer)

                                 Common Stock
              ---------------------------------------------------
                        (Title of Class of Securities)

                                   740584107
                   -----------------------------------------
                                 (CUSIP Number)

      Stuart B. Panish c/o Zweig-DiMenna Associates LLC, 900 Third Avenue
                   New York, New York 10022  (212) 451-1100
- --------------------------------------------------------------------------------
           (Name, Address and Telephone Number of Person Authorized
                    to Receive Notices and Communications)

                               November 26, 1997
                  -------------------------------------------
            (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report 
the acquisition which is the subject of this Schedule 13D, and is filing this 
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].

Check the following box if a fee is being paid with this statement [_]. (A fee
is not required only if the filing person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7).

Note: Six copies of this statement, including all exhibits, should be filed with
the Commission. See Rule 13d-1(a) for other parties to whom copies are to be 
sent.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, 
and for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

<PAGE>
 
                                 SCHEDULE 13D

CUSIP No. 740584107


1  NAME OF REPORTING PERSON
   S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

        Zweig-DiMenna Special Opportunities, L.P.
        Zweig-DiMenna Partners, L.P.
        Zweig-DiMenna International Limited
        Zweig-DiMenna International Managers, Inc., on behalf of a
         discretionary account       
        Gotham Advisors, Inc., on behalf of a discretionary account

2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                 (a) [_]
                                                                     (b) [_]

3  SEC USE ONLY

4 SOURCE OF FUNDS*  WC

5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
  ITEMS  2(d) or 2(e)                                                    [_]    

6  CITIZENSHIP OR PLACE OF ORGANIZATION
    
        Zweig-DiMenna Special Opportunities, L.P. - Delaware
        Zweig-DiMenna Partners, L.P. - New York    
        Zweig-DiMenna International Limited - British Virgin Islands
        Zweig-DiMenna International Managers, Inc. - Delaware
        Gotham Advisors, Inc. - Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

7  SOLE VOTING POWER
 
        Zweig-DiMenna Special Opportunities, L.P.-272,600
        Zweig-DiMenna Partners, L.P.-445,700
        Zweig-DiMenna International Limited-1,012,400
        Zweig-DiMenna International Managers, Inc., on behalf of a discretionary
         account-196,000
        Gotham Advisors, Inc., on behalf of a discretionary account-124,100
                
8  SHARED VOTING POWER
        
        0                 

9  SOLE DISPOSITIVE POWER
                  
        Zweig-DiMenna Special Opportunities, L.P.-272,600
        Zweig-DiMenna Partners, L.P.-445,700
        Zweig-DiMenna International Limited-1,012,400
        Zweig-DiMenna International Managers, Inc., on behalf of a discretionary
         account-196,000
        Gotham Advisors, Inc., on behalf of a discretionary account-124,100

10  SHARED DISPOSITIVE POWER

        0

11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        Zweig-DiMenna Special Opportunities, L.P.-272,600
        Zweig-DiMenna Partners, L.P.-445,700
        Zweig-DiMenna International Limited-1,012,400
        Zweig-DiMenna International Managers, Inc., on behalf of a discretionary
         account-196,000
        Gotham Advisors, Inc., on behalf of a discretionary account-124,100

12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
                                                                          [_]
                
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11
        
        Total-8.1%
        
        Zweig-DiMenna Special Opportunities, L.P.-1.1%
        Zweig-DiMenna Partners, L.P.-1.7%
        Zweig-DiMenna International Limited-4.0%
        Zweig-DiMenna International Managers, Inc., on behalf of a discretionary
         account-0.8%
        Gotham Advisors, Inc., on behalf of a discretionary account-0.5%

14 TYPE OF REPORTING PERSON*
        
        Zweig-DiMenna Special Opportunities, L.P. - PN
        Zweig-DiMenna Partners, L.P. - PN
        Zweig-DiMenna International Limited - CO
        Zweig-DiMenna International Managers, Inc. - CO
        Gotham Advisors, Inc. - CO

<PAGE>
 
                        SCHEDULE 13D - AMENDMENT NO. 2

     Zweig-DiMenna Special Opportunities, L.P., Zweig-DiMenna International
Limited, Zweig-DiMenna Partners, L.P., Zweig-DiMenna International Managers,
Inc. and Gotham Advisors, Inc. (collectively the "Investors") hereby amend the
Schedule 13D, filed with respect to shares of common stock, par value $0.01 per
share ("Shares") of Premisys Communications, Inc.

ITEM 3 SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATIONS

     The first sentence of Item 3 is amended to read as follows:

     "The securities of Premisys Communications, Inc. were purchased at an
aggregate cost of $45,885,551 with the investment capital of Zweig-DiMenna
Special Opportunities, L.P., Zweig-DiMenna International Limited, Zweig-DiMenna
Partners, L.P., the discretionary account managed by Zweig-DiMenna International
Managers, Inc. (the "ZDIM Account") and the discretionary account managed by
Gotham Advisors, Inc. (the "Gotham Account")."

ITEM 5 INTEREST IN SECURITIES OF THE ISSUER

     The answer to Item 5 is amended to read as follows:

     a.   Aggregate number of shares beneficially owned:

            Zweig-DiMenna Special Opportunities, L.P.         -       272,600
                                                                  
            Zweig-DiMenna International Limited               -     1,012,400
                                                                  
            Zweig-DiMenna Partners, L.P.                      -       445,700
                                                                  
            ZDIM Account                                      -       196,000
                                                                  
            Gotham Account                                    -       124,100
                                                                  
          Percent of class beneficially owned:                    
                                                                  
            Zweig-DiMenna Special Opportunities, L.P.         -           1.1%
                                                                  
            Zweig-DiMenna International Limited               -           4.0%
                                                                  
            Zweig-DiMenna Partners, L.P.                      -           1.7%
                                                                  
            ZDIM Account                                      -           0.8%
                                                                  
            Gotham Account                                    -           0.5%
<PAGE>
 
     b.  Number of shares as to which there is sole power to vote:
                                                                  
            Zweig-DiMenna Special Opportunities, L.P.         -       272,600
                                                                  
            Zweig-DiMenna International Limited               -     1,012,400
                                                                  
            Zweig-DiMenna Partners, L.P.                      -       445,700
                                                                  
            ZDIM Account                                      -       196,000
                                                                  
            Gotham Account                                    -       124,100
                                                                  
          Number of shares as to which there is shared            
           power to vote or to direct the vote:                   
                                                                  
            Zweig-DiMenna Special Opportunities, L.P.         -             0
                                                                  
            Zweig-DiMenna International Limited               -             0
                                                                  
            Zweig-DiMenna Partners, L.P.                      -             0
                                                                  
            ZDIM Account                                      -             0
                                                                  
            Gotham Account                                    -             0
                                                                  
          Number of shares as to which there is sole power        
           to dispose or to direct the disposition:               
                                                                  
            Zweig-DiMenna Special Opportunities, L.P.         -       272,600
                                                                  
            Zweig-DiMenna International Limited               -     1,012,400
                                                                  
            Zweig-DiMenna Partners, L.P.                      -       445,700
                                                                  
            ZDIM Account                                      -       196,000
                                                                  
            Gotham Account                                    -       124,100
                                                                  
          Number of shares as to which there is shared            
           power to dispose or to direct the disposition:         
                                                                  
            Zweig-DiMenna Special Opportunities, L.P.         -             0
                                                                  
            Zweig-DiMenna International Limited               -             0
                                                                  
            Zweig-DiMenna Partners, L.P.                      -             0
<PAGE>
 
            ZDIM Account                                      -             0
                                                                  
            Gotham Account                                    -             0

c.   Since November 14, 1997, the date of the Investors' most recent 13D filing,
Zweig-DiMenna Special Opportunities, L.P., Zweig-DiMenna International Limited,
Zweig-DiMenna Partners, L.P., the ZDIM Account and the Gotham Account purchased
the Shares on the open market on the following dates and at the following prices
and in the following amounts:

            ZWEIG-DIMENNA SPECIAL OPPORTUNITIES, L.P.

            DATE         DESCRIPTION OF PURCHASE

            11/14/97       Purchased 3,300 shares at $29.9125 a share

            11/21/97       Purchased 3,300 shares at $26.6250 a share

            11/24/97       Purchased 13,100 shares at $25.3563 a share

            11/25/97       Purchased 13,100 shares at $27.1813 a share

            11/26/97       Purchased 3,900 shares at $26.75 a share

            11/28/97       Purchased 6,600 shares at $27.2563 a share


            ZWEIG-DIMENNA INTERNATIONAL LIMITED

            DATE         DESCRIPTION OF PURCHASE

            11/14/97       Purchased 12,400 shares at $29.9125 a share

            11/21/97       Purchased 12,400 shares at $26.6250 a share

            11/24/97       Purchased 49,900 shares at $25.3563 a share

            11/25/97       Purchased 50,000 shares at $27.1813 a share

            11/26/97       Purchased 15,100 shares at $26.75 a share

            11/28/97       Purchased 25,000 shares at $27.2563 a share

<PAGE>
 
            ZWEIG-DIMENNA PARTNERS, L.P.

            DATE         DESCRIPTION OF PURCHASE

            11/14/97       Purchased 5,400 shares at $29.9125 a share

            11/21/97       Purchased 5,400 shares at $26.6250 a share

            11/24/97       Purchased 21,500 shares at $25.3563 a share

            11/25/97       Purchased 21,400 shares at $27.1813 a share

            11/26/97       Purchased 6,400 shares at $26.75 a share

            11/28/97       Purchased 10,700 shares at $27.2563 a share


            ZDIM ACCOUNT

            DATE         DESCRIPTION OF PURCHASE

            11/14/97       Purchased 2,400 shares at $29.9125 a share

            11/21/97       Purchased 2,400 shares at $26.6250 a share

            11/24/97       Purchased 9,500 shares at $25.3563 a share

            11/25/97       Purchased 9,500 shares at $27.1813 a share

            11/26/97       Purchased 2,800 shares at $26.75 a share

            11/28/97       Purchased 4,700 shares at $27.2563 a share


            GOTHAM ACCOUNT

            DATE         DESCRIPTION OF PURCHASE

            11/14/97       Purchased 1,500 shares at $29.9125 a share

            11/21/97       Purchased 1,500 shares at $26.6250 a share

            11/24/97       Purchased 6,000 shares at $25.3563 a share

            11/25/97       Purchased 6,000 shares at $27.1813 a share

            11/26/97       Purchased 1,800 shares at $26.75 a share

<PAGE>
 
            11/28/97       Purchased 3,000 shares at $27.2563 a share

     d.   Not Applicable

     e.   Not Applicable
<PAGE>
 
                                   SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date: December 1, 1997

                                      ZWEIG-DiMENNA SPECIAL OPPORTUNITIES, L.P.
                                      By: Zweig-DiMenna Associates LLC,
                                          Managing General Partner

                                      By:    /s/  Joseph A. DiMenna
                                             ----------------------
                                      Name:  Joseph A. DiMenna
                                      Title: A Managing Director of the Managing
                                             General Partner


                                      ZWEIG-DiMENNA INTERNATIONAL LIMITED
                                      By: Zweig-DiMenna International
                                          Managers, Inc., Investment Manager

                                      By:    /s/  Joseph A. DiMenna
                                             ----------------------
                                      Name:  Joseph A. DiMenna
                                      Title: Executive Vice President


                                      ZWEIG-DiMENNA PARTNERS, L.P.
                                      By: Zweig-DiMenna Associates LLC,
                                          Managing General Partner

                                      By:    /s/  Joseph A. DiMenna
                                             ----------------------
                                      Name:  Joseph A. DiMenna
                                      Title: A Managing Director of the Managing
                                             General Partner


                                      ZWEIG-DiMENNA INTERNATIONAL MANAGERS, INC.

                                      By:    /s/  Joseph A. DiMenna
                                             ----------------------
                                      Name:  Joseph A. DiMenna
                                      Title: Executive Vice President


                                      GOTHAM ADVISORS, INC.

                                      By:    /s/  Joseph A. DiMenna
                                             ----------------------
                                      Name:  Joseph A. DiMenna
                                      Title: Vice President


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