SUMMIT INVESTORS III LP
SC 13G, 2000-02-14
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                (AMENDMENT NO. )*

                           Somera Communications, LLC
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                          Common Stock, $.001 par value
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    83445810
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 1999
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

         Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

                     [ ]  Rule 13d-1(b)
                     [ ]  Rule 13d-1(c)
                     [X]  Rule 13d-1(d)

*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 the
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 1 of 39 Pages
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 2 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Ventures V, L.P.
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware limited partnership
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON*

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 3 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Partners V, L.P.
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware limited partnership
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 4 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Partners, LLC
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware limited liability company
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        CO
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 5 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Advisors Fund (QP), L.P.
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware limited partnership
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 6 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Advisors Fund, L.P.
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware limited partnership
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 7 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Investors III, L.P.
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware limited partnership
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 8 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        E. Roe Stamps, IV
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 9 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Stephen G. Woodsum
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 10 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Gregory M. Avis
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 11 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Martin J. Mannion
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 12 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Bruce R. Evans
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 13 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Thomas S. Roberts
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 14 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Walter G. Kortschak
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 15 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Joseph F. Trustey
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 16 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Kevin P. Mohan
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 17 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Peter Y. Chung
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

- ---------------------                                        -------------------
CUSIP NO.    83445810                    13G                 PAGE 18 OF 39 PAGES
- ---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Thomas F. Farb
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP *
                                                                 (a)[ ]
                                                                 (b)[ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

        United States
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

                                0 shares
        NUMBER OF          -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                13,757,333 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                13,757,333 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        13,757,333 shares
- --------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
- --------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        29.5%
- --------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

ITEM 1(A).        NAME OF ISSUER:  Somera Communications, LLC

ITEM 1(B).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 5383
                  Hollister Avenue, Santa Barbara, CA 93111.

ITEM 2(A).        NAMES OF PERSONS FILING: Summit Ventures V, L.P., Summit
                  Partners V, L.P., Summit Partners, LLC, Summit V Advisors Fund
                  (QP), L.P., Summit V Advisors Fund, L.P., Summit Investors
                  III, L.P. and Messrs. E. Roe Stamps, IV, Stephen G. Woodsum,
                  Gregory M. Avis, Martin J. Mannion, Bruce R. Evans, Thomas S.
                  Roberts, Walter G. Kortschak, Joseph F. Trustey, Kevin P.
                  Mohan, Peter Y. Chung, and Thomas F. Farb.

                  Summit Partners V, L.P. is the sole general partner of Summit
                  Ventures V, L.P., Summit V Advisors Fund (QP), L.P., and
                  Summit V Advisors Fund, L.P. Summit Partners, LLC is the sole
                  general partner of Summit Partners V, L.P. Messrs. Stamps,
                  Woodsum, Avis, Mannion, Evans, Roberts, Kortschak, Trustey,
                  Mohan, Chung and Farb are individual general partners of
                  Summit Partners, LLC and Summit Investors III, L.P.

ITEM 2(B).        ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
                  The address of the principal business office of Summit
                  Ventures V, L.P., Summit Partners V, L.P., Summit Partners,
                  LLC, Summit V Advisors Fund (QP), L.P., Summit V Advisors
                  Fund, L.P., Summit Investors III, L.P. and Messrs. Stamps,
                  Woodsum, Mannion, Evans, Roberts, Trustey, Mohan and Farb is
                  Summit Partners, 600 Atlantic Avenue, Boston, Massachusetts
                  02210. The address of the principal business office of Messrs.
                  Avis, Kortschak and Chung is Summit Partners, 499 Hamilton
                  Avenue, Palo Alto, California 94301.

ITEM 2(C).        CITIZENSHIP: Each of Summit Ventures V, L.P., Summit Partners
                  V, L.P., Summit V Advisors Fund (QP), L.P., Summit V Advisors
                  Fund, L.P., Summit Investors III, L.P. is a limited
                  partnership organized under the laws of the State of Delaware.
                  Summit Partners, LLC is a limited liability company organized
                  under the laws of the State of Delaware. Each of Messrs.
                  Stamps, Woodsum, Mannion, Evans, Roberts, Trustey, Mohan,
                  Chung and Farb is a United States citizen.

ITEM 2(D).        TITLE OF CLASS OF SECURITIES: Common Stock, $.001 par value
                  per share.

ITEM 2(E).        CUSIP NUMBER: 83445810

ITEM 3.           IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1(B), OR
                  13D-2(B), CHECK WHETHER THE PERSON FILING IS A:
                  Not Applicable.

                               Page 19 of 39 Pages
<PAGE>

ITEM 4.           OWNERSHIP.

                  (a)   Amount Beneficially Owned:

                        Each of Summit Ventures V, L.P., Summit Partners V,
                        L.P., Summit Partners, LLC, Summit V Advisors Fund (QP),
                        L.P., Summit V Advisors Fund, L.P., and Summit Investors
                        III, L.P. (individually an "Entity" and collectively the
                        "Entities") may be deemed to own beneficially 13,757,333
                        shares of Common Stock as of December 31, 1999. Each of
                        Messrs. Stamps, Woodsum, Avis, Mannion, Evans, Roberts,
                        Kortschak, Trustey, Mohan, Chung and Farb may be deemed
                        to own beneficially 13,757,333 shares of Common Stock as
                        of December 31, 1999.

                        As of December 31, 1999, Summit Ventures V, L.P. was the
                        record owner of 12,618,986 shares of Common Stock. As of
                        December 31, 1999, Summit V Advisors Fund (QP), L.P. was
                        the record owner of 723,116 shares of Common Stock. As
                        of December 31, 1999, Summit V Advisors Fund, L.P. was
                        the record owner of 220,976 shares of Common Stock. As
                        of December 31, 1999, Summit Investors III, L.P. was the
                        record owner of 194,253 shares of Common Stock. The
                        shares held of record by Summit Ventures V, L.P., Summit
                        V Advisors Fund (QP), L.P., Summit V Advisors Fund,
                        L.P., and Summit Investors III, L.P. are referred to
                        herein collectively as the "Record Shares." By virtue of
                        the affiliate relationships among the Entities, each
                        Entity may be deemed to own beneficially all of the
                        Record Shares. Hence, each Entity may be deemed to own
                        beneficially 13,757,333 shares of Common Stock. In their
                        capacities as individual general partners of Summit
                        Partners, LLC and Summit Investors III, L.P., each of
                        Messrs. Stamps, Woodsum, Avis, Mannion, Evans, Roberts,
                        Kortschak, Trustey, Mohan, Chung and Farb may be deemed
                        to own beneficially 13,757,333 shares of Common Stock.

                        Each of the reporting persons expressly disclaims
                        beneficial ownership of any shares of Common Stock of
                        Somera Communications, LLC, except in the case of Summit
                        Ventures V, L.P. for the 12,618,986 shares which it
                        holds of record, Summit V Advisors Fund (QP), L.P. for
                        the 723,116 shares which it holds of record, Summit V
                        Advisors Fund, L.P. for the 220,976 shares which it
                        holds of record and Summit Investors III, L.P. for the
                        194,253 shares which it holds of record.

                  (b)   Percent of Class:

                        Summit Ventures V, L.P.:  29.5%
                        Summit Partners V, L.P.:  29.5%
                        Summit Partners, LLC:  29.5%
                        Summit V Advisors Fund (QP), L.P.:  29.5%

                                  Page 20 of 39 Pages
<PAGE>

                        Summit V Advisors Fund, L.P.:  29.5%
                        Summit Investors III, L.P.:  29.5%
                        E. Roe Stamps, IV:  29.5%
                        Stephen G. Woodsum:  29.5%
                        Gregory M. Avis:  29.5%
                        Martin J. Mannion:  29.5%
                        Bruce R. Evans:  29.5%
                        Walter G. Kortschak:  29.5%
                        Thomas S. Roberts: 29.5%
                        Joseph F. Trustey:  29.5%
                        Kevin P. Mohan:  29.5%
                        Peter Y. Chung:  29.5%
                        Thomas F. Farb:  29.5%

                        The foregoing percentages are calculated based on the
                        46,562,500 shares of Common Stock reported to be
                        outstanding on Form S-1/A for Somera Communications, LLC
                        filed November 12, 1999.

                  (c)   Number of shares as to which such person has:

                        (i)    sole power to vote or to direct the vote:

                               0 shares for each reporting person

                        (ii)   shared power to vote or to direct the vote:

                        Summit Ventures V, L.P.:  13,757,333 shares
                        Summit Partners V, L.P.:  13,757,333 shares
                        Summit Partners, LLC:  13,757,333 shares
                        Summit V Advisors Fund (QP), L.P.:  13,757,333 shares
                        Summit V Advisors Fund, L.P.:  13,757,333 shares
                        Summit Investors III, L.P.:  13,757,333 shares
                        E. Roe Stamps, IV:  13,757,333 shares
                        Stephen G. Woodsum:  13,757,333 shares
                        Gregory M. Avis:  13,757,333 shares
                        Martin J. Mannion:  13,757,333 shares
                        Bruce R. Evans:  13,757,333 shares
                        Walter G. Kortschak:  13,757,333 shares
                        Thomas S. Roberts:  13,757,333 shares
                        Joseph F. Trustey:  13,757,333 shares
                        Kevin P. Mohan:  13,757,333 shares
                        Peter Y. Chung:  13,757,333 shares
                        Thomas F. Farb:  13,757,333 shares

                        (iii)  sole power to dispose or direct the disposition
                               of:


                                  Page 21 of 39 Pages
<PAGE>

                               0 shares for each reporting person

                        (iv)   shared power to dispose or direct the disposition
                               of:

                        Summit Ventures V, L.P.:  13,757,333 shares
                        Summit Partners V, L.P.:  13,757,333 shares
                        Summit Partners, LLC:  13,757,333 shares
                        Summit V Advisors Fund (QP), L.P.:  13,757,333 shares
                        Summit V Advisors Fund, L.P.:  13,757,333 shares
                        Summit Investors III, L.P.:  13,757,333 shares
                        E. Roe Stamps, IV:  13,757,333 shares
                        Stephen G. Woodsum:  13,757,333 shares
                        Gregory M. Avis:  13,757,333 shares
                        Martin J. Mannion:  13,757,333 shares
                        Bruce R. Evans:  13,757,333 shares
                        Walter G. Kortschak:  13,757,333 shares
                        Thomas S. Roberts:  13,757,333 shares
                        Joseph F. Trustey:  13,757,333 shares
                        Kevin P. Mohan:  13,757,333 shares
                        Peter Y. Chung:  13,757,333 shares
                        Thomas F. Farb:  13,757,333 shares

ITEM 5.           OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
                  Not Applicable.

ITEM 6.           OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
                  PERSON.
                  Not Applicable.

ITEM 7.           IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
                  ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
                  COMPANY.
                  Not Applicable.

ITEM 8.           IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
                  Not Applicable.  The reporting persons expressly disclaim
                  membership in a "group" as defined in Rule 13d-1(b)(1)(ii)(J).

ITEM 9.           NOTICE OF DISSOLUTION OF GROUP.
                  Not Applicable.

ITEM 10.          CERTIFICATION.



                               Page 22 of 39 Pages
<PAGE>

                  Not Applicable.  This statement on Schedule 13G is not filed
                  pursuant to Rule 13d-1(b).



























                               Page 23 of 39 Pages

<PAGE>
                                   SIGNATURES
                                   ----------

      After reasonable inquiry and to the best of our knowledge and belief, we
certify that the information set forth in this statement is true, complete and
correct. We also hereby agree to file this statement jointly pursuant to the
Agreement listed on Exhibit 1 hereto.
                    ---------

Dated:  February 11, 2000.

SUMMIT VENTURES V, L.P.                        SUMMIT ADVISORS FUND, L.P.

By: Summit Partners V, L.P.                    By: Summit Partners V, L.P.

By: Summit Partners, LLC                       By: Summit Partners, LLC

By:           *                                By:           *
    -----------------------                        -----------------------
    General Partner                                General Partner

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

By: Summit Partners V, L.P.                    By:           *
                                                   -----------------------
By: Summit Partners, LLC                           General Partner

By:           *
    -----------------------
    General Partner
                                                             *
SUMMIT PARTNERS V, L.P.                        ---------------------------
                                               E. Roe Stamps
By: Summit Partners, LLC

By:           *
    -----------------------
    General Partner
                                                             *
SUMMIT PARTNERS, LLC                           ---------------------------
                                               Martin J. Mannion
By:           *
    -----------------------
    General Partner

              *                                              *
- ---------------------------                    ---------------------------
Stephen G. Woodsum                             Bruce R. Evans

              *
- ---------------------------
Gregory M. Avis

                                  Page 24 of 39 Pages
<PAGE>




              *                                              *
- ---------------------------                    ---------------------------
Walter G. Kortschak                            Thomas S. Roberts


              *                                              *
- ---------------------------                    ---------------------------
Joseph F. Trustey                              Kevin P. Mohan


              *
- ---------------------------
Peter Y. Chung



                                               *By: /s/ Thomas F. Farb
                                                    ----------------------
                                                    Thomas F. Farb
                                                    On his own behalf and as
                                                    Attorney-in-fact

- --------------------------------------------------------------------------------

*     Pursuant to Powers of Attorney on file with the Commission, which Powers
      of Attorney are incorporated herein by reference. Copies of such Powers of
      Attorney are attached hereto as Exhibit 2.
                                      ---------











                               Page 25 of 39 Pages

                                                                       EXHIBIT 1
                                                                       ---------


                                    AGREEMENT

      Pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934,
the undersigned hereby agree that only one statement containing the information
required by Schedule 13G need be filed with respect to the ownership by each of
the undersigned of shares of Common Stock of Somera Communications, LLC

      This agreement may be executed in any number of counterparts, each of
which shall be deemed an original.

      EXECUTED this 11 day of February, 2000.

SUMMIT VENTURES V, L.P.                        SUMMIT ADVISORS FUND, L.P.

By: Summit Partners V, L.P.                    By: Summit Partners V, L.P.

By: Summit Partners, LLC                       By: Summit Partners, LLC

By:           *                                By:           *
    -----------------------                        -----------------------
    General Partner                                General Partner

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

By: Summit Partners V, L.P.                    By:           *
                                                   -----------------------
By: Summit Partners, LLC                           General Partner

By:           *
    -----------------------
    General Partner
                                                             *
SUMMIT PARTNERS V, L.P.                        ---------------------------
                                               E. Roe Stamps
By: Summit Partners, LLC

By:           *
    -----------------------
    General Partner

SUMMIT PARTNERS, LLC

By:           *
    -----------------------
    General Partner

                               Page 26 of 39 Pages
<PAGE>


              *                                              *
- ---------------------------                    ---------------------------
Stephen G. Woodsum                             Martin J. Mannion

              *                                              *
- ---------------------------                    ---------------------------
Gregory M. Avis                                Bruce R. Evans

              *                                              *
- ---------------------------                    ---------------------------
Walter G. Kortschak                            Thomas S. Roberts

              *                                              *
- ---------------------------                    ---------------------------
Joseph F. Trustey                              Kevin P. Mohan

              *
- ---------------------------
Peter Y. Chung


                                               *By:  /s/ Thomas F. Farb
                                                     ---------------------
                                                     Thomas F. Farb
                                                     On his own behalf and as
                                                     Attorney-in-fact


- --------------------------------------------------------------------------------
*     Pursuant to Powers of Attorney on file with the Commission, which Powers
      of Attorney are incorporated herein by reference. Copies of such Powers of
      Attorney are attached hereto as Exhibit 2.
                                      ---------

                               Page 27 of 39 Pages



                                                                       EXHIBIT 2
                                                                       ---------


                                POWER OF ATTORNEY


      KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below hereby constitutes and appoints each and any of E. Roe Stamps, IV, Stephen
G. Woodsum, Gregory M. Avis, Walter G. Kortschak and Thomas F. Farb his true and
lawful attorney-in-fact and agent, with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities (until revoked in writing) to sign any and all instruments,
certificates and documents required to be executed on behalf of himself
individually or on behalf of each or any of Summit Ventures, L.P., SP (1984),
L.P. (f/k/a Summit Partners, L.P.), Stamps, Woodsum & Co., Summit Partners'
Holdings, L.P., Summit Ventures II, L.P., Summit Partners II, L.P., Stamps,
Woodsum & Co. II, SV Eurofund C.V., SV International, L.P., Summit Investors,
L.P., Summit Investors II, L.P., Summit Investors III, L.P., Summit Ventures
III, L.P., Summit Partners III, L.P., Stamps, Woodsum & Co. III, Summit Ventures
IV, L.P., Summit Partners IV, L.P., Stamps, Woodsum & Co., IV, Summit
Subordinated Debt Fund, L.P., Summit Partners SD, L.P., Summit E-Tek Holdings,
LLC, SW Management Corp., Summit Partners, L.P., Summit Master Company, LLC,
Summit Subordinated Debt Fund II, L.P., Summit Partners SD II, LLC, Summit
Ventures V, L.P., Summit Partners V, L.P., Summit Partners, LLC, Summit V
Advisors Fund, L.P., Summit V Advisors Fund (QP), L.P. and Summit V Companion
Fund, L.P., pursuant to sections 13 and 16 of the Securities Exchange Act of
1934, as amended (the "Exchange Act"), and any and all regulations promulgated
thereunder, and to file the same, with all exhibits thereto, and any other
documents in connection therewith, with the Securities and Exchange Commission,
and with any other entity when and if such is mandated by the Exchange Act or by
the By-laws of the National Association of Securities Dealers, granting unto
said attorney-in-fact and agent full power and authority to do and perform each
and every act and thing requisite and necessary fully to all intents and
purposes as she might or could do in person thereby ratifying and confirming all
that said attorney-in-fact and agent, or her substitute or substitutes, may
lawfully do or cause to be done by virtue hereof.


                               Page 28 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ E. Roe Stamps, IV
                                               ---------------------------
                                               E. Roe Stamps, IV


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came E. Roe
Stamps, IV, known to me to be the person described and who executed the
foregoing instrument that he acknowledged that he executed the same.

[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------





                               Page 29 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Stephen G. Woodsum
                                               ---------------------------
                                               Stephen G. Woodsum


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came Stephen G.
Woodsum, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------






                               Page 30 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Martin J. Mannion
                                               ---------------------------
                                               Martin J. Mannion


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came Martin J.
Mannion, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------








                               Page 31 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 8th
day of February, 2000.


                                               /s/ Gregory M. Avis
                                               ---------------------------
                                               Gregory M. Avis


State of California                         )
                                            ) ss:
County of Santa Clara                       )


      On this 8th day of February, 2000, before me personally came Gregory M.
Avis, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ---------------------------









                               Page 32 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Thomas S. Roberts
                                               ---------------------------
                                               Thomas S. Roberts


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came Thomas S.
Roberts, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.


[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------








                               Page 33 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Bruce R. Evans
                                               ---------------------------
                                               Bruce R. Evans


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )

      On this 7th day of February, 2000, before me personally came Bruce R.
Evans, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]


                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------






                               Page 34 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 8th
day of February, 2000.


                                               /s/ Walter G. Kortschak
                                               ---------------------------
                                               Walter G. Kortschak


State of California                         )
                                            ) ss:
County of Santa Clara                       )


      On this 8th day of February, 2000, before me personally came Walter G.
Kortschak, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ---------------------------






                               Page 35 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Joseph F. Trustey
                                               ---------------------------
                                               Joseph F. Trustey


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came Joseph F.
Trustey, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------








                               Page 36 of 39 Pages

<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Kevin P. Mohan
                                               ---------------------------
                                               Kevin P. Mohan


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came Kevin P.
Mohan, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]

                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ----------------






                               Page 37 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 8th
day of February, 2000.


                                               /s/ Peter Y. Chung
                                               ---------------------------
                                               Peter Y. Chung



Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 8th day of February, 2000, before me personally came Peter Y.
Chung, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ---------------------------







                               Page 38 of 39 Pages
<PAGE>


      IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th
day of February, 2000.


                                               /s/ Thomas F. Farb
                                               ---------------------------
                                               Thomas F. Farb


Commonwealth of Massachusetts       )
                                    ) ss:
County of Suffolk                   )


      On this 7th day of February, 2000, before me personally came Thomas F.
Farb, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

[Notary Seal]


                                               /s/ Cynthia R. Freedman
                                               ---------------------------
                                               Notary Public


                                               My Commission expires:
                                               October 20, 2000
                                               ---------------------------










                               Page 39 of 39 Pages


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