scope:

The present document provides information on the electromagnetic environmental conditions encountered where telecommunications equipment is installed and is a compilation of data concerning electromagnetic environmental conditions.

In the present document only locations for equipment that are in the telecommunication network are considered.

Only some of the data is based on comprehensive environmental surveys. Such surveys are rarely reported in available literature. Consequently, estimated values are often used when the electromagnetic environmental conditions are stated. In order to characterize the electromagnetic environment, it is necessary to make certain assumptions on the installation practice. If these assumptions are not satisfied in a particular case, the environmental characteristic may not apply.

Each environment is characterized in two ways:

• by a short verbal description of its assumed attributes;

• by a quantitative statement of the characteristic severities of the crucial environmental phenomena.

It is only possible to specify the appropriate EMC requirements following the assessment of the severity of the electromagnetic environment. This in turn will be helpful in ensuring that the telecommunications network equipment has the sufficient intrinsic immunity to enable it to operate as intended in its environment.