QSC AG ( QSC stands for Quality Service Communications ), headquartered in Cologne Ossett is a German IT service provider and a network operator and provider of internet and telecommunications products. The company is listed ( in the Nasdaq ) and offers business customers telephony, broadband, virtual private networks (VPN ), IT services, leased line permanent connections and value-added services, such as call center functionality. Moreover, QSC offers Internet service providers and other resellers broadband data solutions for resale.

  • 3.1 Data
  • 3.2 language
  • 3.3 Cloud



In 1997, Bernd Schlobohm and Gerd Eickers the Quality Service Communications GmbH, a consulting firm for large companies in the telecommunications sector. 1999 concentrated on the DSL market and the company was transformed into a corporation. As one of the first in Germany QSC offered in 1999 SDSL connections to Cologne. The offering for commercial customers was marketed under the name Speedway DSL. A year later, the IPO took place on the Neuer Markt in Frankfurt and on the Nasdaq in New York ( delisted in 2002 ). In 2001, QSC Aachen Internet service provider ginko and so gained access to the retail business. A DSL flat rate for residential customers was initially offered in Bremen and Bremerhaven, and later in other cities. The special features of the offer included the use of fast-path technology and the absence of a forced disconnection.

The following year, QSC took over from Ventelo Europe Group, the Germany -scale telecommunications company Ventelo GmbH ( Dusseldorf ) and became the comprehensive telecommunications provider. Since March 2004, QSC is in the Nasdaq, the index of the 30 leading public technology companies in Germany listed.

In 2004, QSC a resale contract with Telekom from, and led to a T-DSL -based services, which initially mainly directed at business customers. Nevertheless, even its own network was further expanded. In the same year a treaty was signed, the AOL Germany allowed to use part of the capacity of the company's backbone.

In 2004 and 2005, QSC showed places 2 or 3 of the Technology Fast 50 Award by the auditing company Deloitte Germany. 2005 the company won also the German Internet Industry Award for Best Business ISP. 2006, Q -DSL home GmbH was founded as a subsidiary of QSC and outsourced private client business to this company. In the fourth quarter of the year for the first time a positive net profit was reported.

On 2 April 2009 the marketing of retail products has been discontinued. At this time, the private customer segment represented less than 10 percent of total sales. In 2005, the company had achieved a majority of sales to business customers.

Since 2010, the company performs a conversion from a pure network company to a service company for the ICT industry with Managed Outsourcing and open access services. This includes, among other things, announced in June 2010, form long-term cooperation with Freenet network, with the QSC on behalf of Freenet handles the complete narrowband traffic. In August 2010 the company announced the launch of a nationwide first open access platform. The company wants to attract other network operators with their own fiber infrastructure to link its network with the QSC and thus open for other providers. The operators should benefit from the anticipated increase in the utilization of their own infrastructure from a faster return on investment. First Open Access Partners is the Leipzig city carriers HLkomm, which opens its infrastructure for the QSC Wholesale Partner 1 & 1.

In order to expand its expertise in the ICT sector further, QSC announced in December 2010 the acquisition of the Nuremberg IP Partner AG, a provider of hosting and IT outsourcing services. In May 2011, the takeover of the Hamburg Information Society for Information Systems (INFO AG) followed.

The development of a platform for multiple cloud services is driving QSC ahead: At CeBIT 2011, the company won an award from the technology competition of the Federal Ministry of Economics and security for the development of a " sensor cloud" project for networking sensors, control data and - applications.

For the third quarter of 2011, QSC also announced for the first time in the mobile telecommunications products for business customers. This is made possible through a cooperative agreement with the mobile operator E-Plus.

Network coverage

QSC AG offers its services with high coverage and achieved with their own broadband network over 1900 terminal regions in Germany. The operation of the high- concentration network has been transferred to which was established on September 2006 net operating company Plusnet, at the end of 2010 in addition to QSC, Tele2 was involved with 32.5%. On 23 December 2010, QSC announced the redemption of all shares of Tele2 Plusnet. In addition to QSC and Tele2 Freenet, Congstar and United Internet DSL complete packages implement connection via the network from Plusnet.

Moreover, QSC operates its own nationwide narrowband voice network with 474 interconnection points in Germany.

Group structure

QSC AG is the parent company of the Group, and maintains other subsidiaries (as of December 2012): These have included:

  • 010090 GmbH (100 %)
  • 01098 Telecom GmbH (100 %)
  • 01012 Telecom GmbH (100 %)
  • 010052 Telecom GmbH (100 %)
  • Broadnet Services GmbH, Cologne ( 100%)
  • Broadnet Germany GmbH, Cologne ( 100%)
  • F & Q network operations GmbH & Co. KG (100 %)
  • INFO AG, Hamburg ( 100%)
  • INFO Business Systems GmbH, Hamburg ( 100%)
  • INFO Customer Service GmbH, Hamburg ( 100%)
  • IP Partner AG, Nuremberg (100 %)
  • IP Exchange GmbH, Nuremberg (100 %)
  • IPX Server GmbH, Nuremberg ( 100%)
  • Colocation IP GmbH, Nuremberg (100 %)
  • Plusnet GmbH & Co. KG, Cologne ( 100%)
  • Q-DSL home GmbH, Cologne ( 100%)
  • T & Q network operations GmbH & Co. KG (100 %)
  • Tengo GmbH, Cologne ( 100%)
  • Ventelo GmbH, Cologne ( 100%)


The shareholder structure is as follows (as of February 25, 2013 ):

Source: Investor relations page of the company


  • Jürgen Hermann, CEO
  • Barbara pride, CFO
  • Stefan Freyer, Director
  • Henning Reinecke, Chief Executive


Which belongs to QSC Ventelo was criticized because it offered an expensive call-by- call prefix, which could easily be confused with the more favorable number of a competitor. A price announcement it did not yet exist at this position. The revision in the Telecommunications Act, all providers are required to price announcement as of August 1, 2012. Also, high per-minute rates for calls to fixed networks abroad are always a cause for complaint. So up to € 1.99 per minute were calculated in January 2014 for connections to neighboring European countries.



QSC AG for the marketing of symmetric DSL connections that existed at the daughter of Q- DSL home to 2 April 2009, for residential customers became famous. Compared to established ADSL protocols can be therefore higher data rates in the transmit direction reach. In addition, as participants can be achieved with extra long subscriber lines, where no or only insufficient DSL coverage would be possible with the usual market in Germany ADSL-over- ISDN protocols. Depending on the conductor cross-section are connections up to 10 km line length from the main distribution feasible. An alternative to wired data supply are radio links in the WLL base. Here QSC supplies with the product QSC WLL business for business customers bandwidths of two to 100 Mbit / s.


The company offered early and IP -based voice products under the generic term " QSC IPfonie " in the residential and business customer environment to. Initially, these were a VoIP replacement for the traditional fixed-line telephony, later and with the expansion of its next generation networks were added professional telephone system connections based on IP and a purely network-based IP PBX, called QSC IPfonie centraflex for business customers.


With the change to the ICT provider QSC began to market their own cloud developments. The first product the company introduced in 2012 the communication platform " cospace ", which is available free of charge in a stripped-down version. Based on the same cloud platform followed in the summer of 2013, the QSC Analyser, a cloud- based tool for measuring various quality parameters in networks. To this end, the company developed its first own hardware, called the QSC box that transmitted as a sensor, the measurement data to the cloud platform.