Environmentally friendly network infrastructure.

  • Fourth version of the European Code of Conduct on Energy Consumption of Broadband Equipment (CoCBB) implemented.
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State-of-the-art information and communications technology (ICT) increasingly helps replace energy and resource-intensive products and services with more efficient ones. At the same time, however, the amount of data that needs to be stored and transported is growing due to ever more sophisticated applications. According to the SMARTer 2020 study published by the Global e-Sustainability Initiative (GeSI), the ICT industry was responsible for around two percent of global emissions in 2011, the equivalent of around 910 megatons of CO2. Compared to the earlier study, SMART 2020, the current publication shows a flatter curve in increasing emissions and a higher potential to reduce ICT emissions thanks to technological advancements. As part of the "Low carbon society" CR action area we are planning to consistently use these advances in the interest of climate protection, to increase not only the performance of networks and data centers but also their energy efficiency.

Outdated systems that are no longer needed are systematically switched off, replaced and recycled at Telekom in Germany. We do our best to employ energy-efficient, environmentally friendly technology when procuring new systems. We also support and motivate our customers to save energy and reduce CO2 emissions by offering efficient ICT solutions.

Code of Conduct on Energy Consumption of Broadband Equipment.

By signing the European Code of Conduct on Energy Consumption of Broadband Equipment (CoCBB), Deutsche Telekom has pledged to optimize the energy requirements of its broadband networks. In cooperation with its suppliers, Telekom makes sure that the new systems it introduces do not exceed the maximum levels specified in the CoCBB. Because the code is continually being adjusted in line with new technologies and findings, we continuously have to comply with new specifications. We integrated the latest version of the CoCBB, the fourth version of the code, during the reporting period into the environmental specifications of our procurement policies. These included technical specifications for network technology but also for our Entertain boxes. The Entertain media receivers that we brought out in 2012 comply with the CoCBB's current specifications on energy consumption. We are currently preparing for version 5 of the CoCBB to go into effect.

We conduct annual surveys at Telekom's technical areas for fixed-line and mobile communications in Germany to help us analyze compliance with the technical specifications set forth in the CoCBB. The results are summarized in an annual report, which we then send to the regulatory authority. Our approach and process is also reviewed in an audit.

Last year's CR report

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20 European telecommunications companies—all of them members of GeSI—signed the CoCBB in September 2012. The signatories, including the Telekom Group, pledged to optimize energy requirements in the broadband sector.

The CoCBB specifies standards for end devices and network components and places a number of requirements on systems manufacturers: Among other things, it requires them to observe energy-efficiency criteria when producing, selecting and employing devices and systems.

Low power mode on the road to a green DSL.

When applying the Code of Conduct on Energy Consumption of Broadband Equipment (CoCBB), Telekom identified opportunities to optimize the energy requirements for its ADSL2+ network. Before then, all active connections were always on, i.e., in full power mode (L0 mode). We will be able to save a significant amount of energy by switching the connections to the "enhanced L2 mode while using data services with lower bandwidth." The technical requirements for this are next-generation modems with optimized ADSL2+ function. We initiated a feasibility study on the enhanced L2 mode in January 2013. The study included a field test under real-life conditions. The results are expected by mid-2014.

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So far, the L2 mode has not been used in the network due to poor quality, stability and interoperability. In the meantime, we have been able to improve the quality of the ADSL2+ network in L2 mode as well as stability through improved L2 mode features. Telekom played a decisive role in the development of the new standard. Analyses revealed that the use of the L2 mode in the ADSL2+ network generates energy savings of up to 20 percent.