Filed Pursuant to Rule 425

Filed by Calix, Inc.

Commission File No. 001-34674

Pursuant to Rule 425 Under the Securities Act of 1933

And Deemed Filed Pursuant to Rule 14a-12

Under the Securities Exchange Act of 1934

Subject Company: Occam Networks, Inc.

Commission File No. 001-33069

This filing relates to the proposed acquisition by Calix, Inc, a Delaware corporation (“Calix”), of Occam Networks, Inc., a Delaware corporation (“Occam Networks”), pursuant to the terms of that certain Agreement and Plan of Merger and Reorganization, dated as of September 16, 2010, by and among Calix, Ocean Sub I, Inc., Ocean Sub II, LLC and Occam Networks.


Subject: Calix to Acquire Occam Networks

Target Audience:



Primary: Customers / Prospects

Date: September 16, 2010

It is STRONGLY encouraged that you read the entire Sales Brief before discussing the transaction with customers or any third party.

Transaction Details:



Calix is acquiring Occam Networks for $171 million in stock and cash.



The deal is expected to close in Q4 2010 or Q1 2011 subject to Occam Networks stockholder approval, regulatory clearance and other customary closing conditions.



A conference call with Wall Street analysts and investors was held September 16th at 8:30 am EDT. A replay of the call can be found on either company’s web site.


Until the completion of the acquisition, the companies will continue to operate as totally separate entities.



After the completion of the acquisition, the combined organization will have an estimated 800+ customers, have shipped over 10M+ ports and will have customers with an aggregate number of subscriber lines over 48 million.



Refer any additional financial questions to Investor Relations at each company.

Strategic Advantages of the Transaction:

Calix / Occam Networks combination focused on helping our customers to succeed



Accelerating Unified Access



Complementary expertise expected to speed product innovation



An expanded unified access portfolio



Increased resources, scale, and focus on access lays foundation for enhanced solutions development, testing, and quality



Accelerating Our Customers



A wider range of deployment options expected from an expanded Unified Access portfolio



closer relationships with customers and partners expected through direct and expanded sales coverage and support



Enhanced alignment with communications service provider network and business model transformation

Key Expected Benefits: Solutions and Technology



A broader Unified Access portfolio



Greater breadth and diversity of solutions



Form factors, ONTs, density options


Complementary technologies and resources



Share many common hardware and software components and attributes – facilitated integration into Unified Access



Occam Networks’s decade of experience in IP and Ethernet matched with Calix’s decade of experience in fiber access



Better address access network challenges going forward



Enhanced voice flexibility



A full range of solutions across TDM, SIP, H.248, and MGCP



New innovations



Expanded engineering, test resources, and R&D dollars solely focused and target on access innovation

Key Expected Benefits: Business

Expanded resources and a clear business vision aligned with your network and business interests to help customers to succeed



A focus on access



Expanded resources, testing, and investment in the part of your network that connects you to your customers



An enhanced direct customer engagement model



More “feet on the street”



Expansion of our world-class support organization and tools



Expanded Interoperability



Combined Calix Compatible and OPAN programs create what we believe would be the industry’s broadest and most mature program for partner interoperability

Key Objectives: Occam Networks Customers

The BLC6000 has substantial footprint and a loyal customer base. Our intent is to integrate the B-Series (BLC6000) into the Unified Access portfolio, and continue to invest in the platform in the following ways:



Plan to integrate the B-Series into the Unified Access portfolio, allowing it to reside on the same Ethernet ring with C- and E-Series platforms



Plan to combine our respective ONT portfolios to make what we believe to be the industry’s broadest portfolio of ONTs, and support that portfolio across all three Calix platforms – the B-Series, the C-Series, and the E-Series



Plan to integrate the “B-Series” into the Calix Management System, or CMS, providing a single, broad, and mature management system across the expanded Unified Access portfolio, and complement CMS with valuable new tools from the Occam Networks inventory



Plan to enhance the Unified Access portfolio to support a broader set of voice protocols, including SIP, H.248, MGCP, as well as legacy TDM protocols

We believe that the net result of these initiatives will accelerate opportunities for our expanded customer base and substantially broaden the Calix Unified Access portfolio.

Additional Information and Where You Can Find It

Calix will file a Registration Statement on Form S-4 containing a proxy statement/prospectus and other documents concerning the proposed acquisition with the Securities and Exchange Commission (the “SEC”). Investors are urged to read the proxy statement/prospectus when it becomes available and other relevant documents filed with the SEC because they will contain important information. Security holders may obtain a free copy of the proxy statement/prospectus (when it is available) and other documents filed by Calix and Occam with the SEC at the SEC’s web site at The proxy statement/prospectus and other documents may also be obtained for free

by contacting Calix Investor Relations by e-mail at, by telephone at 415-445-3232 or by mail at Investor Relations, Calix, Inc., 1035 N. McDowell Blvd., Petaluma, CA 94954 or by contacting Occam Investor Relations by e-mail at, by telephone at 805-692-2957 or by mail at Occam Networks Investor Relations 6868 Cortona Drive, Santa Barbara, CA 93117.

Participants in the Acquisition of Occam Networks

Calix, Occam Networks, certain of their respective directors, executive officers, members of management and employees may, under the rules of the SEC, be deemed to be participants in the solicitation of proxies in favor of the proposed merger. Information regarding the persons who may be considered “participants” in the solicitation of proxies will be set forth in the proxy statement/prospectus when it is filed with the SEC. Information regarding certain of these persons and their beneficial ownership of Calix common stock as of December 31, 2009 is also set forth in the prospectus filed by Calix on March 24, 2010 with the SEC. This document is available free of charge at the SEC’s web site at or by going to Calix’s Investor Relations page on its corporate website at Information concerning Occam’s directors and executive officers is set forth in Occam’s proxy statement for its 2010 Annual Meeting of Stockholders, which was filed with the SEC on April 8, 2010. This document is available free of charge at the SEC’s website at or by going to Occam’s Investor Relations page on its corporate web site at Additional information regarding the persons who may, under the rules of the SEC, be deemed participants in the solicitation of proxies in connection with the proposed merger, and a description of their direct and indirect interests in the proposed merger, which may differ from the interests of Calix stockholders or Occam stockholders generally will be set forth in the proxy statement/prospectus when it is filed with the SEC.

Forward-Looking Statements

This document contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934. These statements can be identified by the words, “believes,” “views,” “expects,” “projects,” “hopes,” “could,” “will,” “intends,” “should,” “estimate,” “would,” “may,” “anticipates,” “plans” and other similar words. These statements are based on management’s current expectations, estimates, forecasts, projections and beliefs and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. The forward-looking statements contained in this document include statements about the timing of completing the acquisition, future results; benefits of the acquisition to stockholders, employees, customers and partners; the ability of the combined organization to broaden the Unified Access portfolio; plans to continue to invest in Occam platforms and roadmaps; the ability to increase innovation across an expanded Unified Access portfolio; the ability to integrate platforms and products to provide a broader solutions portfolio and accelerate innovation; the ability to enhance solutions development, testing and quality; ability to expand sales and support coverage and enhance the customer engagement model; the ability to increase deployment options, ability to create closer relationships with customers and partners; the ability to expand resources for innovation and execution; the ability to align the view of CSP and business model transformation; the ability to address network challenges; the ability to expand resources, testing and investment; the ability to enhance the customer engagement model; and other statements regarding the proposed acquisition. These statements are not guarantees of future performance, involve risks, uncertainties and assumptions that are difficult to predict, and are based upon assumptions as to future events that may not prove accurate. Therefore, actual outcomes and results may differ materially from what is expressed herein. For example, if Occam Networks does not receive required stockholder approval or the parties fail to satisfy other conditions to closing, the transaction may not be consummated. In any forward-looking statement in which Calix or Occam Networks expresses an expectation or belief as to future results, such expectation or belief is expressed in good faith and believed to have a reasonable basis, but there can be no assurance that the statement or expectation or belief will result or be achieved or accomplished. The following factors, among others, could cause actual results to differ materially from those described in the forward-looking statements: failure of the Occam Networks stockholders to approve the proposed acquisition; the challenges and costs of closing, integrating, restructuring and achieving anticipated synergies; the ability to retain key employees; and other economic, business, competitive, and/or regulatory factors affecting the businesses of Calix and Occam Networks generally, including those set forth in the filings of Calix with the Securities and Exchange Commission, especially in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of Calix’s prospectus filed with the SEC on March 24, 2010 and its quarterly reports on Form 10-Q, Occam Networks’ annual reports on Form 10-K

and quarterly reports on Form 10-Q, each of Calix’s and Occam Networks’ current reports on Form 8-K and other SEC filings. These forward-looking statements speak only as of the date hereof. Calix and Occam Networks are under no obligation to (and expressly disclaim any such obligation to) update or alter their forward-looking statements whether as a result of new information, future events, or otherwise.