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Continuation of Question 3/5 studied in 1997-2000
Type of question
Task-oriented
Reason for question
In recent years, modern society has experienced a high and
steady growing dependency on telecommunications. In this
context, the reliability of telecommunication services has
become an issue of high priority. Operators all over the world
are driving their efforts in order to assure the reliability of
the entire telecommunication system, comprising the key stations
of the network backbone (such as the gateways and synchronism stations)
up to the access network. Therefore, the protection against the
dangerous effects produced by lightning discharges (high currents and
associated strong electromagnetic fields) is a matter of prime concern.
This question aims to establish cost-effective engineering procedures
in order to allow the telecommunication operators to achieve the
desired reliability in their networks.
Text of question
The purpose of this question is to produce new recommendations and to
revise the existing ones regarding the protection of fixed, mobile and
wireless telecommunications systems against the dangerous effects of
lightning discharges. The study should include protection against
lightning effects on:
a) fixed telecommunication lines, including the lines
made of metallic symmetric conductors, coaxial cables and
non-metal-free fibre-optic cables;
b) mobile and wireless telecommunication systems, in
particular the radio base stations which very often have
their antennas installed in high structures exposed to
lightning discharges;
c) telecommunication stations that make part of the
network's backbone and, therefore, require a high
reliability from the protection point of view.
Specific objective and time-frame
The outcome of this question, within the study period,
should result in:
a) updated Recommendation K.25;
b) updated Recommendation K.40, including protection
against all dangerous effects that lightning can cause in
telecommunication stations;
c) updated Recommendation K.46;
d) updated Recommendation K.47;
e) a new recommendation on protection against lightning
effects on lines made of coaxial cables;
f) a new Recommendation on the protection against
lightning effects on radio base stations of mobile and
wireless telecommunication systems.
NOTE - The revision and the editing of additional chapters of
the Handbook "Protection of telecommunication lines and
equipment against lightning discharges" may be accomplished.
Relationship to other
- Recommendations
- Questions
- Study Groups
- Standardization bodies
- IEC TC 81, CENELEC TC 81X
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