UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  SCHEDULE l3D
                    Under the Securities Exchange Act of 1934



                          Altigen Communications, Inc.
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                                (Name of Issuer)

                    Common Stock, par value $0.001 per share
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                         (Title of Class of Securities)

                                    021489109
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                                 (CUSIP Number)
                                                     with a copy to:
       Mr. Douglass Bermingham                       Robert G. Minion, Esq.
       627 Harris Road                               Lowenstein Sandler PC
       Bedford Hills, New York  10507                65 Livingston Avenue
       (212) 307-2660                                Roseland, New Jersey  07068
                                                     (973) 597-2424
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                 (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                 April 28, 2006
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             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule l3G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of Sections 240.13d-1(e),  240.13d-1(f) or 240.13d-1(g),  check
the following box. [  ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits.  See Section 240.13d-7 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 on 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).





Cusip No.  021489109
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  1)   Names of  Reporting Persons.  I.R.S. Identification Nos. of above persons
       (entities only):

                               Douglass Bermingham
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  2)   Check the Appropriate Box  if a Member of a Group  (See Instructions):
             (a)   [ ]
             (b)   [X]

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  3)   SEC Use Only

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  4)   Source of Funds (See Instructions):    WC, OO

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  5)   Check if  Disclosure of  Legal Proceedings Is  Required Pursuant to Items
       2(d) or 2(e):
                        Not Applicable
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  6)   Citizenship or Place of Organization:     United States

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        Number of                        7) Sole Voting Power:         723,434*
                                            ------------------------------------
        Shares Beneficially              8) Shared Voting Power:             0*
                                            ------------------------------------
        Owned by
        Each Reporting                   9) Sole Dispositive Power:    723,434*
                                            ------------------------------------
        Person With                     10) Shared Dispositive Power:        0*
                                            ------------------------------------
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  11)  Aggregate Amount Beneficially Owned by Each Reporting Person:   723,434*

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  12)  Check if the  Aggregate Amount in Row (11)  Excludes Certain Shares  (See
       Instructions):
                           [X]
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  13)  Percent of Class Represented by Amount in Row (11):      4.8%*

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  14)  Type of Reporting Person (See Instructions):     IN

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*  As of April 28, 2006, Douglass  Bermingham  possesses  sole power to vote and
direct the  disposition of 723,434 shares of the common stock,  $0.001 par value
per  share  (the  "Shares"),  of  Altigen   Communications,   Inc.,  a  Delaware
corporation (the "Company"),  held by (i) a Delaware limited liability  company,
the  sole  member  of  which  is  Mr.  Bermingham,   (ii)  several  trusts,  the
beneficiaries of which are members of Mr. Bermingham's  family, and for which he
serves as the trustee, (iii) Mr. Bermingham's  individual retirement account and
(iv) Mr. Bermingham  personally.  Accordingly,  for the  purposes of  Rule 13d-3
under  the  Securities  Exchange  Act of  1934,  as  amended  (the  "Act"),  Mr.
Bermingham is deemed to beneficially  own 723,434 Shares,  or 4.8% of the Shares
deemed issued and  outstanding as of April 28, 2006.  Mr. Bermingham has engaged
in certain  discussions with Larry Bursten,  holder of 50,000 Shares as of April
28, 2006,  with  respect to the future of the Company and its various  strategic
alternatives.  As a result of such conversations, Messrs. Bermingham and Bursten
(the  "Parties")  may be deemed to have formed a "group" for purposes of Section
13(d) of the Act, and the rules promulgated thereunder. Accordingly, each of the
Parties  may be deemed to be the  beneficial  owner of the  Shares  beneficially
owned by the other. Each of the Parties expressly disclaims beneficial ownership
of the Shares beneficially owned by the other. Additionally, each of the Parties
expressly  disclaims any assertion or presumption that the Parties  constitute a
"group." The aggregate number of Shares held by the Parties as of April 28, 2006
is 773,434, or 5.2% of the Shares deemed issued and outstanding as of that date.
See Item 5 of this Schedule 13D for additional information.





Item 1.   Security and Issuer.
          -------------------

          The class of equity  securities  to which this Schedule 13D relates is
the  common  stock,  par value  $0.001  per share  (the  "Shares"),  of  Altigen
Communications,  Inc.,  a  Texas  corporation  (the  "Company").  The  principal
executive  offices of the Company are located at 4555 Cushing Parkway,  Fremont,
CA 94538.


Item 2.   Identity and Background.
          -----------------------

          The person filing this statement is Douglass Bermingham, whose address
is 627 Harris Road, Bedford Hills, New York 10507. Mr. Bermingham exercises sole
voting  and  investment  authority  with  respect  to the  Shares  held by (i) a
Delaware limited liability company,  the sole member of which is Mr. Bermingham,
(ii) several trusts, the beneficiaries of which are members of Mr.  Bermingham's
family,  and  for  which  he  serves  as  the  trustee,  (iii)  Mr. Bermingham's
individual retirement account and (iv) Mr. Bermingham personally  (collectively,
the "Accounts").

          Mr.  Bermingham  has never been  convicted in any criminal  proceeding
(excluding traffic violations or similar misdemeanors),  nor has he been a party
to any civil proceeding  commenced before a judicial or  administrative  body of
competent  jurisdiction  as a  result  of which  he was or is now  subject  to a
judgment,  decree or final order enjoining future  violations of, or prohibiting
or mandating  activities subject to, federal or state securities laws or finding
any  violation  with respect  to such laws.  Mr. Bermingham  is a citizen of the
United States.

Item 3.   Source and Amount of Funds or Other Consideration.
          -------------------------------------------------

          All funds used to  purchase  the  securities  of the Company set forth
herein on behalf of the  Accounts  have  come  directly  from the  assets of the
Account  holders.  The  aggregate  amount of funds used in making the  purchases
reported and/or included in this Schedule 13D was approximately $1,895,397.

Item 4.   Purpose of Transaction.
          ----------------------

          The acquisition of the securities referred to herein is for investment
purposes on behalf of  the Accounts.  Except as set forth below,  Mr. Bermingham
has no present plans or intentions which relate to or would result in any of the
transactions required to be described in Item 4 of Schedule 13D.  Mr. Bermingham
may make further purchases of Shares from time to time and may dispose of any or
all Shares held by the Accounts at any time.

          Mr. Bermingham  believes that the Shares are undervalued and represent
an attractive  investment  opportunity.  Mr. Bermingham  also believes  that the
Company should explore its strategic  alternatives and may benefit from engaging
an investment bank to do so.

          Mr.  Bermingham  intends to closely  evaluate the  performance  of the
Shares,  including but not limited to the continued  analysis and  assessment of
the  Company's  business,  assets,  operations,   financial  condition,  capital
structure,  management  and prospects.  He intends to pursue active  discussions





with the Company's  existing  management  with respect to actions which might be
taken by the Company to maximize shareholder value. Depending upon the Company's
financial condition,  results of operations,  future prospects and other factors
which Mr. Bermingham deems relevant, Mr. Bermingham may, among other things, (i)
communicate with other  shareholders of the Company or persons who may desire to
become  shareholders  of the Company  regarding the replacement of the Company's
existing executive officers and/or existing members of the board of directors of
the Company,  and/or other matters regarding the management and operation of the
Company,  (ii) seek the removal of one or more members of the Company's board of
directors and/or executive officers, (iii) seek expansion of the Company's board
of directors,  (iv) solicit proxies,  to be used at either the Company's regular
annual meeting of shareholders, or at a special meeting of shareholders, for the
purposes  described  in clauses (i) and/or (ii) above or for the election of one
or more nominees to the board of directors of the Company,  and/or (v) take such
other actions as Mr. Bermingham may determine.

Item 5.   Interest in Securities of the Issuer.
          ------------------------------------

          Based upon information set forth in the Company's  Quarterly Report on
Form 10-Q/A for the quarterly  period ended December 31, 2005, as filed with the
Securities and Exchange  Commission on February 21, 2006,  there were 14,935,587
Shares issued and outstanding as of February 14, 2006.

          As of April 28,  2006,  the  Accounts  held an  aggregate  of  723,434
Shares.  Douglass  Bermingham  possesses  sole  power  to vote  and  direct  the
disposition of all Shares held in the Accounts. Accordingly, for the purposes of
Rule 13d-3 under the  Securities  Exchange Act of 1934,  as amended (the "Act"),
Mr.  Bermingham is deemed to  beneficially  own 723,434  Shares,  or 4.8% of the
Shares deemed  issued and  outstanding as of April 28, 2006.  Mr. Bermingham has
engaged in certain discussions with Larry Bursten, holder of 50,000 Shares as of
April 28,  2006,  with  respect to the  future of the  Company  and its  various
strategic alternatives.  As a  result of such conversations,  Messrs. Bermingham
and Bursten (the  "Parties") may be deemed to have formed a "group" for purposes
of Section 13(d) of the Act, and the rules promulgated thereunder.  Accordingly,
each of the  Parties  may be deemed  to be the  beneficial  owner of the  Shares
beneficially  owned  by the  other.  Each  of the  Parties  expressly  disclaims
beneficial   ownership   of  the  Shares   beneficially   owned  by  the  other.
Additionally,   each  of  the  Parties  expressly  disclaims  any  assertion  or
presumption  that the Parties  constitute  a "group."  The  aggregate  number of
Shares  held by the  Parties  as of April 28,  2006 is  773,434,  or 5.2% of the
Shares deemed issued and outstanding as of that date.

          During  the  sixty  days on or  prior  to  April  28,  2006,  the only
transactions  in Shares,  or securities  convertible  into,  exercisable  for or
exchangeable  for  Shares,  by  Mr. Bermingham  or any  other  person  or entity
controlled  by him or any  person or entity  for  which he  possesses  voting or
investment control over the securities thereof,  were the purchases and sales of
Shares  detailed in the table  below (each of which was  effected in an ordinary
brokerage transaction):

                                   (Purchases)

     Date                  Amount                Price

    03/01/06                8,050              $ 1.7111
    03/02/06                  150              $ 1.8200





    03/03/06                2,000              $ 1.9100
    03/06/06                3,500              $ 1.9160
    03/08/06                4,300              $ 1.8723
    03/09/06                6,650              $ 1.8716
    03/10/06                3,000              $ 1.8540
    03/23/06                1,000              $ 1.8900
    03/23/06                6,000              $ 1.8800
    03/23/06                1,750              $ 1.8700
    03/24/06                  290              $ 1.9200
    03/24/06                1,250              $ 1.9100
    03/24/06               11,710              $ 1.9000
    03/24/06                3,500              $ 1.8900
    03/27/06                3,360              $ 1.9500
    03/27/06                1,724              $ 1.9265
    03/27/06                2,500              $ 1.9000
    03/28/06                1,000              $ 1.8900
    03/28/06                2,000              $ 1.8750
    03/29/06                  100              $ 1.9700
    03/29/06                9,803              $ 1.9000
    03/29/06                4,350              $ 1.8900
    03/29/06                  100              $ 1.8800
    03/29/06                1,900              $ 1.8700
    03/29/06                2,321              $ 1.8500
    03/31/06                1,000              $ 1.9000
    03/31/06                1,150              $ 1.8900
    03/31/06                1,300              $ 1.8400
    04/04/06                1,200              $ 1.8900
    04/04/06                2,500              $ 1.8800
    04/05/06                1,000              $ 1.8900
    04/05/06                9,500              $ 1.8800
    04/06/06                2,000              $ 1.8800
    04/07/06                4,500              $ 1.8900
    04/10/06                1,000              $ 1.9100
    04/11/06                  600              $ 1.9000
    04/12/06                1,000              $ 1.8700
    04/17/06                1,940              $ 1.8700
    04/17/06                  400              $ 1.7900
    04/18/06                2,250              $ 1.8500
    04/18/06                1,350              $ 1.8400
    04/18/06                1,000              $ 1.8200





    04/19/06                  500              $ 1.8300
    04/20/06                  500              $ 1.8200
    04/20/06                  732              $ 1.7600
    04/21/06                  618              $ 1.8300
    04/24/06                4,650              $ 1.8300
    04/25/06                2,000              $ 1.8200
    04/25/06                2,000              $ 1.8100
    04/25/06                3,000              $ 1.8000
    04/26/06                2,100              $ 1.8300
    04/26/06                1,000              $ 1.8100
    04/26/06                  400              $ 1.7800
    04/27/06                1,950              $ 1.7700
    04/27/06                2,000              $ 1.7600
    04/27/06                2,500              $ 1.5500
    04/27/06                5,000              $ 1.5200
    04/28/06                7,500              $ 1.6100
    04/28/06                5,000              $ 1.5600


                                     (Sales)

     Date                  Amount                Price

    03/14/06                3,578              $ 1.8508
    03/14/06                  237              $ 1.8400
    03/17/06                3,659              $ 1.7700



Item 6.   Contracts, Arrangements, Understandings or Relationships With  Respect
          to Securities of the Issuer.
          ----------------------------------------------------------------------

          Not  applicable.  See  Item 5 for a  description  of the  relationship
between Messrs. Bermingham and Bursten.


Item 7.   Material to be Filed as Exhibits.
          --------------------------------

          Not applicable.







                                    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.

                                                May 11, 2006


                                                /s/ Douglass Bermingham
                                                --------------------------------
                                                Douglass Bermingham



      Attention: Intentional misstatements or omissions of fact constitute
                Federal criminal violations (See 18 U.S.C. 1001).