Ciena^® Corporation (NYSE: CIEN) expects to announce results for its fiscal fourth quarter and year ended October 31, 2015 on Thursday, December 10, 2015 before the open of the financial markets. The press release also will be available on Ciena’s website at www.ciena.com.

In conjunction with the announcement, Ciena’s management will host a live audio web broadcast beginning at 8:30 AM (Eastern) on December 10, 2015 accessible via www.ciena.com.

Rebroadcast Information

For those listeners unable to participate in the live web broadcast, an archived version of the conference call will be available shortly following the conclusion of the live call in the Investor Relations/Events section of Ciena’s website at www.ciena.com.

Ciena (NYSE: CIEN) is the network specialist. We collaborate with customers worldwide to unlock the strategic potential of their networks and fundamentally change the way they perform and compete. Ciena leverages its deep expertise in packet and optical networking and distributed software automation to deliver solutions in alignment with its OPⁿ architecture for next-generation networks. We enable a high-scale, programmable infrastructure that can be controlled and adapted by network-level applications, and provide open interfaces to coordinate computing, storage and network resources in a unified, virtualized environment. For updates on Ciena news, follow us on Twitter @Ciena or on LinkedIn. Investors are encouraged to review the Investors section of our website at www.ciena.com/investors, where we routinely post press releases, SEC filings, recent news, financial results, and other announcements. From time to time we exclusively post material information to this website along with other disclosure channels that we use.