ShoreTel's Enhanced Unified Communications Solution Facilitates Greater Business Productivity and Collaboration

SUNNYVALE, CA, May 19, 2008 - ShoreTel, Inc., (NASDAQ: SHOR), a leading
provider of Pure IP Unified Communications (UC) solutions, today
announced the latest release of its award-winning unified
communications system, release 8.0. This release streamlines business
communications, offering customers more intuitive access to fully
integrated voice, instant messaging, e-mail and video. With this
release, ShoreTel is the first leading unified communications vendor to
deliver a product that takes advantage of the most recent enhancement
to the H.264 standard for video compression: Scalable Video Coding
(SVC), enabling ShoreTel to provide high-quality video and network
resiliency at an attractive cost to every desktop, including remote
workers. ShoreTel also announced two new energy-efficient voice
switches that drive down an enterprise's overall communications costs.

Enhanced Productivity and Collaboration

ShoreWare® Call Manager's third-generation desktop user interface
offers tabbed windows that make users more productive by making it
easier and faster to access voicemail, call history, directories and
the speed dial list. The system also offers more intuitive call control
features, anticipating user needs and presenting productivity-enhancing
information and tools based on the situation. For example, when a user
starts a call transfer, the phone status of the called party is shown
in real time, letting the caller decide whether or not to proceed with
the transfer.

ShoreTel's new ShoreWare Professional Call Manager supports
easy-to-use, high-quality video (up to 640x480 resolution and up to 30
frames per second), making a video call as natural and simple as a
voice call. Thanks to SVC, the highly resilient video is delivered with
minimal delay, eliminating distance as an impediment to face-to-face
conversations and making it easier for users across the enterprise to
communicate and collaborate effectively. Easy-to-use, high-quality
video calls support company initiatives to reduce travel expenses,
reduce the impact on the environment, and support remote workers.

The Professional Call Manager also provides presence information and
consolidates instant messaging with voice, video and e-mail for a true
unified communications experience. With rich presence information,
users immediately know who is available to respond quickly to a
caller's need. A built-in soft phone capability keeps users productive
even when a telephone isn't available.

"ShoreTel's UC solution is amazingly flexible and adapts to our
needs so we don't have to adapt to it," said Owais Ilyas, IT manager at
Genmab, who has deployed the latest version of ShoreTel's UC solution
in the Denmark-based biotech company's U.S. office. "The new version
has made enormous improvements in usability and allowed our staff to
access the features they love more quickly. No other offering out there
has an interface that is this easy to use."

Greater Deployment Flexibility: New Voice Switches, Support for SIP Devices

ShoreTel's new ShoreGear® 30 voice switch is targeted at branch
locations with up to 10 users and can be reconfigured to support up to
30 IP phones, or to support SIP trunks or devices. The ShoreGear 24A
voice switch supports the need for higher density analog phone
deployments. It provides 24 analog ports and can be configured to
support multi-party conference calls. ShoreGear voice switches are more
environmentally friendly than competitive solutions. They use
significantly less power, require less cooling, have a longer useful
life, and take up less space, resulting in substantially lower carbon
emissions.

ShoreTel's UC system also now includes built-in support for SIP
endpoints, devices, and applications that comply with RFC 3261.
Complementing the system's support for SIP trunking, SIP device
interfaces give customers more flexibility to deploy the devices
required for their specific business needs. Support for SIP devices
does not require an expensive additional server, thus lowering total
cost of ownership.

"The most exciting part of the latest ShoreTel upgrade for me is the
videoconferencing and instant messaging capabilities. I'm looking
forward to using those for greater collaboration," said Randy Adams,
systems analyst at Smithco Engineering, a company with a trucking
division that puts laptops with SIP converters into each truck. "But
the system also has really strong business implications for us as well.
Its support for SIP extensions are transforming our communications
management. Each truck now becomes just another extension on our
ShoreTel UC system, and we can easily see which SIP devices are in
use."

Strong Industry Support

ShoreTel's dedicated pursuit of customer and partner satisfaction
sets the company apart from other players in the industry. With a
history of product excellence and outstanding services, ShoreTel
consistently delights its customers and partners, and the latest
version of the system has already been well received.

"Momentum for unified communications continues to build as companies
of all sizes recognize that the ShoreTel UC system increases
productivity and overall communications reliability while driving down
the total cost of ownership," said Kevin Gavin, vice president of
product marketing at ShoreTel. "With our latest release, we continue to
break new ground, turning video into an everyday communications vehicle
that dramatically enhances the ability of employees at different
locations to collaborate and reduces the need for travel."

Pricing and Availability

Currently available in the U.S. only. ShoreWare Personal Call
Manager is included in the base ShoreTel 8.0 user license. Additional
per-user licenses include ShoreWare Professional Call Manager, $80;
ShoreWare Operator Call Manager, $595; ShoreWare Agent Call Manager,
$295; ShoreWare Supervisor Call Manager, $595; SIP Device License, $30.
The ShoreGear 30 is priced at $1,595. The ShoreGear 24A is priced at
$2,995.

Note: Not all products will be available in all countries. Please call ShoreTel or a local reseller for specific availability.

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.