ITU-T Recommendations

Supplement 47 to ITU-T L-series Recommendations provides various examples of resource saving in building systems, factories, plants, and home applications due to the progress of resource saving within the information and communications technology (ICT) sector. One example is the home network which uses the single-pair Ethernet (SPE) technology.
Another example is related to the semiconductor manufacturing technologies. Semiconductor dies (also known as chips) are currently mostly manufactured on disks (known as wafers) made of silicon, gallium arsenide or gallium nitride. These chips have a rectangular shape which lead to losses at the edge of the wafer. Bigger the die more important is the loss. Some techniques used in the current industries are also introduced for personal computers or server processors (CPU), and for graphics processing units (GPU) to reduce these losses.
To achieve sustainable growth under the constraints of the environment and resources, it is necessary to radically change conventional waste and recycling measures. Conventional waste countermeasures have mainly been recycling (reuse as a raw material), but in addition to this, reduction (control of waste generation) and reuse are also important.
Since twisted pair cables, such as 4-pairs of unshielded twisted pair (UTP) or shielded twisted pair (STP) cables, are mainly used in various local area networks (LANs), a large number of copper resources are still required to provide Internet services around the world. If fewer pairs can achieve the same communication performance as the 4-pair type, resource saving can be realized in the network.