Connecting past, present and future


Innovation is a commitment

For over nine decades WISI has been among the worldwide pioneers of receiving and distributing technology. As a system provider in the product areas of CATV technology, reception and distribution technology, mobile communication and high-frequency assemblies, we have learned not only to maintain the lead in technological development but to continually implement visions into new quality products.

The converging media, new multi-media choices and broadband services demand intelligent transport routes for their distribution. This is our business. As a developer and technology supplier for the key areas of communication we are committed to innovation, now and in the future.


Always a reliable partner

Since its founding in 1926 by Wilhelm Sihn jr., WISI has belonged to the global pioneers of reception and distribution technology. The company deliberately pursues a close integration of research, product development, sales, project teams and on-site production.

In the field of high-quality components for the establishment and development of state-of-the-art TV cables and communication networks, WISI is the undisputed market leader and main supplier for the key cable network operators in all of Germany, and exports to the major international markets. One of WISI's foremost principles is to be a permanent and reliable entity for customers, partners and employees.

WISI is committed to providing top-quality components, services and systems for communication and information, as well as to developing new sectors as the company pioneers into the future. To ensure its continued special position as a global competitor - shaping the technological development of the markets at the same time - WISI invests heavily in the areas of digital video conditioning and glass fiber technology, all the way to the subscriber.


Sustainability is our priority

By systematically applying our environmental management system, our processes are in compliance with the standard ISO 14001, from product development through procurement and production through to disposal and recycling. We expect our partners and suppliers to comply with these guidelines as well.

It is our ambition to implement the European Standard WEEE (2012/19 / EU), RoHS (2011/65 / EU) and REACH (1907/2006 / EC), and comply with their updates. Along our supply chain we only accept RoHS compliant processes from our partners and suppliers. The registration number WEEE-Reg.-Nr. DE 83955467 ascertains our compliance with WEEE and the German guideline "ElektroG".

Please have a look to the video about our region: We are Enzkreis!

Have a look to our warehouse and laboratory.

Join us & be part of our team

Our Services

Support Services

As experts on transmission networks, we assist you with the operation and maintenance of your network

Read more

Consulting & Design

Our long-standing experience makes us experts on planning and designing individual network concepts

Read more

Product & Tech Training

We offer product and technology training to prepare you for the current and future development of TV reception and distribution

Read more
Please choose your market

Explore your local WISI products & find the experts nearest you.

North America

Middle East & Africa

South East Asia