Released on = December 1, 2005, 12:56 am

Press Release Author = VIERLING Communications GmbH

Industry = Telecommunications

Press Release Summary = IFC technology reduces holes in DSL coverage

Press Release Body = Ebermannstadt, Germany - November 29, 2005. Vierling is working
with the Institute for Information Transmission at Friedrich-Alexander University
Erlangen-Nuremberg under Prof. Dr. Johannes Huber to develop a technology that
reduces crosstalk interference on DSL lines. Interference cancellation (IFC)
technology compensates for interference through controlled superimposition of
signals. The primary objective is to improve the availability of DSL in rural
regions. Vierling hopes to use IFC to further take advantage of the global DSL boom.

Increasing DSL range
"We analyze crosstalk interference on DSL lines and feed in compensation signals in
real time", explains Georg Herrmann, Manager Product Line MS/Q at Vierling. "This is
a way of offsetting interference and increasing the signal range." The connection
bandwidth and stability also increase. Initial IFC demonstrations have shown it is
possible to largely compensate for interference and achieve an increase in the DSL
range of up to 20%.

Improving coverage
So far, DSL is available in homes only if the distance to the nearest main
distribution point is not greater than about 3.5 or 4 km. This makes it hard to
provide adequate coverage in rural areas. Rapid growth in the popularity of DSL will
tend to further increase crosstalk interference and limit availability of the
service. Increased crosstalk interference is due to growing usage of existing copper
cables that were not originally intended for DSL.

Profiting from the global boom
With this new technology, Vierling hopes to maximize its profits from the global DSL
and broadband boom. "IFC allows network operators to significantly improve the
quality of their lines through a simple procedure", explains Herrmann. "They can
just connect an IFC connector on the lines and the system will immediately begin to
measure and compensate for interference. Discussions with numerous scientists,
customers and business partners have confirmed the potential of this approach. Now
it is a matter of convincing network operators in Germany and throughout Europe of
the benefits and securing further financing for the project."

About Vierling
Telecommunications supplier Vierling is based in Ebermannstadt, Germany. The company
offers communications and test equipment for companies of all sizes. Vierling's
products range from GSM and UMTS gateways, GSM telephones, alarm generation systems
and remote control technology all the way through complete portable and stationary
test solutions for telecommunications and data networks. Vierling's Production
division specializes in the development and manufacture of electronic subassemblies,
devices and systems for companies in all relevant sectors. Vierling has about 250
employees and generates annual sales of about 30 million Euros. Vierling
Communication SAS is an independent subsidiary based near Paris in Plaisir, France.
Vierling is represented by sales partners in more than 40 countries. For additional
information, please visit: www.vierling.de.

About the LIT
The Institute for Information Transmission (LIT) of the University of Erlangen is
headed by Prof. Dr. Johannes Huber and focuses on a number of research areas in the
field of digital data transmission, including fundamental information theory for
digital communications, modulation techniques and channel encoding for power- and
bandwidth-efficient digital transmission, encoded modulation, modeling of
transmission channels, noncoherent transmission and equalization techniques, digital
transmission via MIMO systems, spread spectrum and CDMA transmission techniques,
fast digital transmission via copper pairs (xDSL), adaptive equalization and
precoding techniques, digital broadcasting systems, digital watermarks and data
transmission via power company lines. For additional Information, please visit:
www.lnt.de.

Web Site = http://www.vierling-group.com

Contact Details = Vierling Communications GmbH
Dr. Markus Diehl
Head of Marketing Communications
Pretzfelder Str. 21
91320 Ebermannstadt
Germany
Tel.: +49-9194 / 97 - 0
Fax: +49-9194 / 97 - 105
Email: marketing@vierling.de