FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
ALTA PARTNERS II INC

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
OCCAM NETWORKS INC/DE [ OCCM ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
04/20/2005
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series A-2 Preferred Stock Warrants (right to buy) (1) 04/20/2005 X 226,800(1) 03/08/2004 09/02/2005 Common Stock 20,618,181(1) (1) 75,163,635(1) D(2)
Series A-2 Preferred Stock (1) 04/20/2005 X 226,800(1) (3) (4) Common Stock 20,618,181(1) (1) 75,163,635(1) D(2)
1. Name and Address of Reporting Person*
ALTA PARTNERS II INC

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
1. Name and Address of Reporting Person*
GRUENER GARRETT

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
1. Name and Address of Reporting Person*
JANNEY DANIEL

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
1. Name and Address of Reporting Person*
NOHRA GUY P

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
1. Name and Address of Reporting Person*
ALTA CALIFORNIA PARTNERS III LP

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
1. Name and Address of Reporting Person*
ALTA CALIFORNIA MANAGEMENT PARTNERS III LLC

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
1. Name and Address of Reporting Person*
ALTA EMBARCADERO PARTNERS III LLC

(Last) (First) (Middle)
ONE EMBARCADERO CENTER
SUITE 4050

(Street)
SAN FRANCISCO CA 94111

(City) (State) (Zip)
Explanation of Responses:
1. Alta California Partners III, L.P. exercised a Warrant for 219,392 shares of Series A-2 Preferred Stock and Alta Embarcadero Partners III, LLC exercised a Warrant for 7,408 shares of Series A-2 Preferred Stock. The exercise price of the Warrants for Series A-2 Preferred Stock is $10.00 per share. The Series A-2 Preferred Stock is convertible into Common Stock on a 1:90.90909 basis.
2. Alta Partners II, Inc. ("APII") provides investment advisory services to several venture capital funds including Alta California Partners III, L.P.("ACPIII") & Alta Embarcadero Partners III, LLC ("AEPIII"). The managing directors ("md") of Alta California Management Partners III, LLC ("ACMPIII")(which is the general partner ("gp") of ACPIII) & the managers of AEPIII exercise sole voting & investment power with respect to the shares owned by such funds. Garrett Gruener, Guy Nohra & Daniel Janney (collectively known as the "principals") are md of ACMPIII (which is the gp of ACPIII) & mangers of AEPIII. As md & managers of such funds, they may be deemed to to share voting & investment powers over the shares held by such funds. Certain principals of APII are directors & members of ACMPIII, they disclaim beneficial ownership of all such shares held by the foregoing funds except to the extent of their proportionate pecuniary interests therein.
3. Immediately
4. N/A
Remarks:
Guy Nohra 04/20/2005
Garrett Gruener 04/20/2005
Daniel Janney 04/20/2005
Guy Nohra 04/20/2005
Guy Nohra 04/20/2005
Guy Nohra 04/20/2005
Guy Nohra 04/20/2005
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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