ShoreTel and Mitel Announce Cross-License and Settlement

Companies Resolve Lawsuits Filed in 2007

SUNNYVALE, Calif. and OTTAWA, ONTARIO - ShoreTel®, Inc., (NASDAQ: SHOR), a leading provider of Pure IP Unified Communications (UC) solutions, and Mitel®, the trusted provider of unified communications, today announced a settlement ending the legal disputes between the two companies.

Under the terms of the settlement, ShoreTel and Mitel agreed to dismiss the lawsuits against each other, and entered into a cross-license of the patents at issue in the litigation. Other terms of the settlement are confidential.

About ShoreTel, Inc.
ShoreTel, Inc. (NASDAQ: SHOR) is a leading provider of Pure IP Unified Communications solutions. ShoreTel enables companies of any size to seamlessly integrate all communications – voice, video, messaging and data – with their business processes. Independent of device or location, ShoreTel’s distributed software architecture eliminates the traditional costs, complexity and reliability issues typically associated with other solutions. ShoreTel continues to deliver the highest levels of customer satisfaction, ease of use and manageability, while driving down the overall total cost of ownership. ShoreTel is headquartered in Sunnyvale, California, and has regional offices in the United Kingdom, Sydney, Australia and Munich, Germany. For more information, visit www.shoretel.com or call 1-877-80SHORE.

About Mitel
Mitel delivers flexibility and simplicity in smart unified communications solutions and applications for organizations of all sizes. Combined with a full range of managed services that include voice and data network design and traffic provisioning, custom application development, and attractive financing options, Mitel is reinventing how successful organizations gain competitive advantage by easily collaborating and communicating over distance and time with customers, colleagues and partners. Mitel’s (www.mitel.com) US headquarters are in Phoenix, Arizona. Global headquarters are in Ottawa, Canada, with offices, partners, and resellers worldwide.