August 28, 2014

Direct Two-way Communication

From unidirectional voice announcements through to conferences with several subscribers – communication and public address systems provide a wide range of functions. For you to gain an insight into the possibilities of such systems I would like to use this blog to introduce you to different functions in the coming weeks and months. This week I would like to start with “Direct Two-way Communication“.

Two-way Communication

In principle, a two-way connection provides communication in both directions (bidirectional) where two subscribers can speak and listen alternately, but not simultaneously. One subscriber speaks and the other listens. Only after one subscriber has finished his message and has released the key, the other can answer.

To establish a direct two-way connection you require at least two intercom stations of any type with one direct call key each. A direct call key is a key with which you can establish a voice connection to a pre-defined target by pressing it down.

You require an individual direct call key for each target. If you want to establish direct two-way connections to 5 different targets with your intercom station, you need 5 direct call keys.

Communication Procedure

To establish a two-way connection the operator at Station A presses the direct call key configured with Station B as target first, keeps it pressed and speaks into the microphone (Push-to-Talk). The subscriber at Station B listens to the message.

As soon as the operator at Station A releases the key, the subscriber at Station B can answer (step 2). To do this, he presses the direct call key configured with Station A as target, keeps it pressed and speaks into the microphone (step 3). So both subscribers can speak and listen alternately, but not simultaneously.

The following illustration shows the communication procedure.

Direct Two-way Communication


















Key Signaling

LEDs at the keys indicating the different connection states are helpful for the operator personnel. I already described the most common types of signaling in one of my last blog articles (please refer to Key Signaling).


You can also assign a priority for each two-way connection. This means that an active connection remains busy for other subscribers with the same or a lower priority. The connection can only be interrupted by a voice connection or function with a higher priority.

Download a more detailed version of this blog article as PDF here.


August 22, 2014

INDUSTRONIC furthers Education




More than 500,000 German school graduates took their first step into working life and started their apprenticeship in 2013.

Also this year approximately 470.000 companies in Germany are looking forward to guide the young people through the approaching challenges.

For more than 20 years INDUSTRONIC has employed trainees on a regular basis.

On average, two adolescents per year are trained in cooperation with vocational schools.

The German educational system is based upon a dual approach. Apprentices are trained in the companies, where they learn the practical part of their profession. Likewise they learn about the theory in vocational schools. Read more »

August 12, 2014

Creative Heads – A Youth Competition in Wertheim

Luca WeiseFor more than ten years, the competition „Creative Heads“ (in German: Kreative Köpfe) is held in the cities Bad Mergentheim and Tauberbischofsheim. Four years ago, Wertheim took part in this contest for the first time.

It is a competition for young inventors from the age of 12 years. One of the main objectives is to motivate young people to put their ideas into practice, since they are especially creative. In collaboration with the companies from Wertheim, pupils can develop innovative products based on their own visions and ideas.

Furthermore the competition offers the students a possibility to have an insight into technical professions.

It is not rare to see that companies are interested in using the adolescents’ creativity for their own purposes. At the end of the contest participants are confronted with patent applications, sometimes. The reason for patents arises in the fact that until a further agreement is reached, the right to the invention lies with the juveniles.

This year INDUSTRONIC supports the young inventor Luca Weise with his thought of a “clear view”.

Our contestant developed an automatic traffic light identification module.

The idea behind the innovative invention is to acoustically warn a driver when the color of a traffic light is not recognizable due to solar radiation.

Along with our instructor for technical professions, Luca was able to develop and implement his automatic traffic light identification module. His efforts paid off. Luca won second place in the category “Innovation & Creativity”.

To this we congratulate our inventor warmly!

For more information about the competition, its participants and winners, please click here.

Luca Weise and the clear view

August 8, 2014

INDUSTRONIC’s Redundancy Concepts – Duplicated Control System

The topic of today’s blog post is the Duplicated Control System (hot stand-by operation), another basic system redundancy concept.

Please refer to the previous articles about this topic: “Introducing INDUSTRONIC’s Redundancy Concepts” and “INDUSTRONIC’s Redundancy Concepts – Single System with N+1 Components” if you need more background information before reading this post.

The Duplicated Control System consists of an active control unit (the Main Unit) which consists of all components of the central exchange unit (e.g. exchange control board, line cards, digital audio processor (DAP), power supply, etc.) and a second control unit in hot stand-by mode (the Secondary Unit) which is equipped with exactly the same components. Usually both the Main Unit and the Secondary Unit are installed in the same cabinet so that there is only little installation space required.

Both control units are synchronized. In case a component of the Main Unit fails the second control unit is automatically activated. After the failure is eliminated switching back can be carried out manually via software interface or if available via keypress at a service intercom station.

By default all intercom stations, amplifiers, speakers, beacons and F&G contacts are connected to both control units to provide high component availability.

Optionally, INDUSTRONIC can provide additional component protection by integrating the digital audio processor (DAP) and the power supply in N+1 configuration for each control unit.

Compared to the Single System with N+1 Components this redundancy concept ensures higher protection as all components of the central exchange unit are duplicated and not only the most critical components.

In my next blog article you will get to know the A+B System (shared operation) concept.


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August 1, 2014


Last week we had our annual INDUSTRONIC Barbecue. The weather was fantastic, the timing perfect. As always the entire team had lots of fun, heaps of great food and a good time!



pic z











July 23, 2014

Standards – Standard Interfaces – Connect the World

Standards – Which Standards?

As you might remember in the 80s and the early 90s there were so many standards as nearly every company created their own ‘standards’ and ‘standard interfaces’.

The reason was that the computer and communication technology was on an upswing in this era, everyone involved tried to sell his idea of standards and standard interfaces on the market.


The regulatory agencies and accreditation bodies weren’t as present and dominant as they are nowadays.So nearly everybody pursued his own interests and almost no devices were compatible to each other.

The loser at the end was the customer, who wanted to get things working…


Interfaces – What Exactly Is It?

An industrial communication and warning system like the INTRON-D plus consists of many interfaces, not only in hardware but also in software. As INDUSTRONIC utilizes open source software, like LINUX, standard interfaces are used – from software development standards to standard industrial interfaces like Modbus/TCP through to standard hardware interfaces like USB.

Standards – And When to Use Them

Standard Interfaces are very useful if you want to interconnect with other systems. An industrial communication system often must be implemented in a plant-wide SCADA system or the status must be transmitted to a SNMP system.

Telephones and telephone systems (PABX) must be integrated. A SIP interface can solve this demand. If you can check off these (and some more) demands you will be ready for today’s industrial communication requirements.

Some of our supported standards are:

Not using standards make sense if you connect your own devices to your own system. The advantages are varied:

  • Very close implementation of special hard- and software functions
  • Very fast response times due to closer hardware interfaces
  • Own software protocols with advanced features compared to standards


In Conclusion

INDUSTRONIC has implemented the most useful and common industrial interfaces – in hardware and in software to interconnect all those devices, applications and technologies which we encounter in our business.


We at INDUSTRONIC make also use of proprietary software and hardware interfaces to implement functions which are useful for our customers and necessary for our projects.

The INTRON-D plus system expands the functions of industrial communication and warning systems to one of the most versatile and user-friendly system worldwide.

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July 18, 2014

INDUSTRONIC’s Redundancy Concepts – Single System with N+1 Components

In one of my recent blog posts I gave you a short introduction to INDUSTRONIC’s component redundancy concepts. Please refer to the “Introducing INDUSTRONIC’s Redundancy Concepts” article.

In the coming posts I would like to give you more details on the three basic redundancy concepts INDUSTRONIC offers:

  • Single System with N+1 Components
  • Duplicated Control System (hot stand-by operation)
  • A+B System (shared operation)

Redundancy Concepts

In today’s blog post I will focus on the Single System with N+1 Components which is defined as follows:

INDUSTRONIC provides a single system with the option to protect important components by exactly one backup component in hot stand-by mode. Hot stand-by mode means that the component is powered and ready for immediate service. In other words if the main component fails, there is an automatic switchover to this backup component which takes over completely after a short timeout. There is no manual intervention required.

INDUSTRONIC recommends the N+1 configuration of the power supply, the central exchange control board, the amplifiers and the digital audio processor (DAP) to provide increased component availability.

This redundancy concept is primarily used to protect individual components from failures caused by age or wear. It provides a standard backup protection for important and critical components at a reasonable price. Feel free to contact us if you need more details on this system redundancy concept.

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July 10, 2014

INDUSTRONIC – Get to know us!

This week we would like to introduce you to the “Engineers of Communication”. Watch our corporate video and learn who we are, what we do, and why we have been successful for 50 years now.


We look forward to receiving your comments on our new corporate video!

July 4, 2014

On-site Service – Customer Service Centers in Germany


Starting in 1964, INDUSTRONIC was able to steadily expand its business when the projects were managed from the headquarter.

But with the introduction of the INTRON and INTRON-S systems in the 1980s and after introducing our first emergency call system in 1991 significant location changes became inevitable.

The INDUSTRONIC management understood that due to customer’s needs a quicker handling of occurring failures was essential. Therefore the target was to provide technical on-site service (installation, commissioning and maintenance) all over Germany.

Until this time, in the beginning of the 1990s, INDUSTRONIC was only present with its headquarter in Wertheim (Baden-Wuerttemberg) and for a short time with a technical office in Muehlheim a. d. Ruhr (North Rhine-Westphalia).

With the opening of the Service Office in Ludwigshafen (Rhineland Palatinate), first actions towards expansion were taken in 1992. The goal was to build an office from there the on-site service activities could be planned.

Just three years later, INDUSTRONIC was able to expand again and opened a Customer Service Center in Dormagen (North Rhine-Westphalia). Our highly qualified staff offers a 24 hours on-site service on 365 days a year and is also responsible for diverse sales activities such as consulting, planning and training.

Whereas the Center started with just seven employees, today 15 motivated staff members are looking forward to realize our customer’s projects, always working closely together with the colleagues in the headquarter in Wertheim.

In 2002, additionally to the foundation of INDUSTRONIC Beijing, the second Service Office was opened at the Hoechst Industrial Park near Frankfurt a. M. (Hesse).

Similar to the office in Ludwigshafen, the main function of this location is to provide a base for the INDUSTRONIC Technical Service employees. From there the service assignments are coordinated.

To make sure that the customer support also covers South and North Germany, INDUSTRONIC decided to put up another Customer Service Center in Berlin, in 2007.

Today INDUSTRONIC offers worldwide customer support with a network of certified partners and representatives which will be steadily expanded.

For more information, please click here.

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June 26, 2014

Technical Support Center offers customer service with a ticket system

Our business partners praise the high quality of INDUSTRONIC systems. However, it sometimes occurs that customers or partners need support. This is when our Technical Support Center (TSC) comes into play. Four competent colleagues are here to answer your technical questions regarding already installed INDUSTRONIC systems and products. To better handle the incoming inquiries we implemented a ticket system.

Technical Support_Ticket System

Example of the ticket system with indication of the status

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