Question 22/V - Protection of telecommunication lines and installations
against lightning
(Continuation of Question 22/V. 1985-1988; revised wording)

Revision of the Handbook "Protection of telecommunication lines and
installations against lightning".

Studies should be directed to the revision of the Handbook on the basis
of the submitted suggestions, if any, and to the editing of additional
parts of the Handbook concerning:

i) the prediction of trouble rates expected on optical fibre cables due
to lightning;

ii) characteristics of the overvoltages and overcurrents caused by
lightning on telecommunication lines, in particular on subscriber loops;

iii) portection of electronic equipment against the effects caused by
lightning which strikes the building where the equipment is installed.

Note 1 - Contribution D.38 (1985-1988) suggests amendments to the
Handbook.

Contribution COM V-3 (1977-1980) gives information about protection of
waveguides against lightning.

Contributions COM V-8 and 39 (1985-88) give imformation about protection
of cables against lightning by means of the gas-filled arresters.

Contribution COM V-10 (1985-1988) describes the application of the storm
warning technique for the protection of telecommunication stations.

Note 2 - Attention is drawn to the following points:

-for study on part 1, Contribution D.38 (1985-1988) should be taken into
account;

-for study on part 2, Contribution COM V-36 (1985-1988) should be
considered;

-for study on part 3, reference should be made to the activity on this
field of IEC TC 81 and to Contribution COM V-26
(1985-1988).