DISCLOSURE UNDER CHAPTER 2, SECTION 10 OF THE FINNISH SECURITIES MARKETS ACT

TELESTE CORPORATION STOCK EXCHANGE RELEASE 26.2.2009 AT 10:45

DISCLOSURE UNDER CHAPTER 2, SECTION 10 OF THE FINNISH SECURITIES MARKETS ACT

Teleste Corporation has received the attached notification from EM Group Oy
referring to Chapter 2, Section 9 of the Finnish Securities Markets Act on a
change in holdings.

TELESTE CORPORATION

Jukka Rinnevaara
CEO

ATTACHMENT:
EM Group Oy's notification

NOTIFICATION REFERED TO THE FINNISH SECURITIES MARKETS ACT ON A CHANGE OF
HOLDINGS

The holdings of EM Group Oy have exceeded twenty percent of the share capital
and voting rights in Teleste Corporation. We hereby notify the Financial
Supervisory Authority and Teleste Corporation of the following:

1. Name of the company in which holdings have been acquired:
Teleste Corporation
2. Reason for this notification: Share purchases made on 25th February 2009
3. Date of change in holdings: 25th February 2009
4. Exact proportion of share capital and voting rights in Teleste Corporation:
Holdings by EM Group Oy are now as follows:
Number of shares 3 617 552
Proportion of share capital and voting rights 20.31694 %.
5. Shareholders complete name and business identity code: EM Group Oy, business
identity code 0854884-7

Teleste in brief:
Teleste is an international technology group founded in 1954, which is
specialized in broadband data communication systems and solutions. The group is
divided into two Strategic Business Units: Broadband Cable Networks and Video
Networks. Broadband Cable Networks serves cable operators and a major part of
its business activities are handled through direct customer contact. Video
Networks supplies solutions for optical signal transmission and video network
management software solutions for video surveillance and a major part of its
business is handled through system integrators. Both Business Units are among
the leading providers in their market areas and are globally recognized for
their know-how and ability to produce technically cutting edge solutions year
after year. In 2008 the group's net sales totalled EUR 109 million and the group
employed 677 persons at the year-end. The company has approximately 30 offices
world-wide and over 90% of Teleste's net sales are generated outside Finland.
The company is listed on the NASDAQ OMX Helsinki Ltd.
Visit www.teleste.com for more information.

DISTRIBUTION:
NASDAQ OMX Helsinki
Media
www.teleste.com