Singapore – June 19, 2012 – Calix, Inc. (NYSE: CALX) has today announced that Malaysian communications service provider Symphonet Sdh Bhd (Symphonet) has chosen the Calix E7-2 Ethernet Service Access Platform (ESAP) for the roll-out of its new high speed broadband networks in Kuala Lumpur and Johore Bahru. These advanced networks will use point-to-point gigabit Ethernet technology over fiber to deliver world-class broadband services, including Internet Protocol Television (IPTV), on-demand video, and broadband speeds of up to 10 gigabits per second (10 Gbps) to businesses in the two cities. At each fiber-served premises, Symphonet will deploy the Calix 700GE family of optical network terminals (ONTs), including the 716GE-I indoor and 766GX business and mobile backhaul ONTs. With these new networks in place, Symphonet's subscribers will experience some of the fastest and most advanced broadband services available in Asia.

One of Malaysia's newly licensed and most innovative telecommunications and Internet service providers, Symphonet expects its new Calix-enabled service offerings to offer extraordinarily high speeds and performance for its customers. "We have a very clear vision of what we want to offer our customers, especially for the business sector, in terms of performance and quality of service," said Dato' Baharum Salleh, CEO of Symphonet. "Calix was able to demonstrate to us that their solution will deliver on that vision cost-effectively and with a good return on investment. The modular nature of the solution ideally fits our business model in terms of building our subscriber base and we are delighted that this will be a highly reliable, flexible, and manageable solution."

Working with network solutions reseller partner Palette Multimedia, Calix solutions provide Symphonet with key operational and capital efficiency benefits. The flexibility of the E7-2 ESAP, with its ability to support both copper and fiber technologies, as well as its industry-leading point-to-point gigabit Ethernet and VDSL2 port densities in a modular one rack unit (1 RU) form factor, allows Symphonet to scale easily as subscriber needs change, with minimal investment in additional construction.

"Consumer and business demand for advanced broadband services is growing rapidly across Malaysia and the rest of Asia as broadband-ready devices proliferate and content continues to move to the cloud," said Andy Lockhart, senior vice president of international sales and marketing at Calix. "With Symphonet's advanced new service offerings, residences and businesses in Malaysia's two largest cities will take a major step forward – able to enjoy some of the fastest broadband services in all of Asia. We are delighted to be a part of this development, and look forward to assisting Symphonet in bringing more world-class broadband services to Malaysia."

To find out more about Calix and its work with Symphonet, please visit Booth #1L4-07 at the CommunicAsia 2012 Exhibition and Conference, Marina Bay Sands, Singapore from June 19-22.

About Calix

Calix (NYSE: CALX) is a global leader in access innovation. Its Unified Access portfolio of broadband communications access systems and software enable communications service providers worldwide to be the broadband provider of choice to their subscribers. For more information, visit the Calix website at www.calix.com.

This press release may contain forward-looking statements that are based upon management's current expectations and are inherently uncertain. Forward-looking statements are based upon information available to us as of the date of this release, and we assume no obligation to revise or update any such forward-looking statement to reflect any event or circumstance after the date of this release, except as required by law. Actual results and the timing of events could differ materially from current expectations based on risks and uncertainties affecting the Company's business. The reader is cautioned not to unduly rely on the forward-looking statements contained in this press release. Additional information on potential factors that could affect Calix's results and other risks and uncertainties are detailed in its report on Form 10-Q for the fiscal quarter ended March 31, 2012, filed with the SEC on May 3, 2012, available at http://www.sec.gov.

Press Inquiries:
Neila Matheny
707-766-3512
Neila.matheny@calix.com

Press Inquiries (International):
Brian Dolby
Proactive PR
+44 (0)7899 914168
brian.dolby@proactive-pr.com

Sheila Lashford
Proactive PR
+44 (0) 7986 514240
sheila.lashford@proactive-pr.com