Energy-efficient technology

Environment IdeaEver increasing data traffic results in a rise in energy use. This energy consumption represents A1 Telekom Austria Group’s most significant environmental impact. This is why A1 Telekom Austria Group relies on reducing its consumption, increasing its energy efficiency and utilising sources of renewable energy.

Energy-efficient technology and intelligent cooling methods


The A1 Telekom Austria Group aims at optimising its energy efficiency despite steadily increasing data traffic. The cooling of technical equipment in data centres consumes large amounts of power but is at the same time indispensable for fail-safe operation.

In this area, innovative cooling concepts (cold aisle containment, hot-spot extraction, hybrid ventilation systems, heat recovery systems) can be used to reduce power demand by up to 75 % compared to conventional cooling systems.

The gradual increase of permissible room temperatures in mobile communication base stations across the group also saves power. Bulgarian subsidiary A1 Bulgaria, for instance, has already increased the control temperature of 22 % of possible mast container sites to 29°C in the year under review which is expected to yield annual savings of up to 1.8 GWh. The complete conversion of all indoor sites in Bulgaria is scheduled for late September 2016.

The intelligent use of GSM resources at mobile communication base stations

GSM resources at mobile communication base stations are adjusted to demand, depending on how many mobile phones are being used at a given time. In peak periods, the systems run at full capacity while the GSM carriers are gradually switched off in times of low traffic.

New technologies being used: Single RAN

Due to technological change and the dynamic growth of data volumes, mobile communication technology is subject to ever shorter innovation cycles. In 2013, A1 has started to convert mobile communications base stations to the so-called Single RAN (Singe Radio Access Network) technology. This not only saves power, it also means that the network can be run faster and at a higher capacity. Some 1,450 mobile communications base stations were thus converted so far.

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The digital journey continues

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Petra Gallaun

Irene Jakobi

Head of CSR
A1 Telekom Austria Group