DD CLC/TS 62367:2005

What is DD CLC/TS 62367 - Safety aspects for xDSL signals on circuits connected to telecommunication networks about?

DD CLC/TS 62367 addresses the safety implications of having xDSL signals on circuits in equipment connected to a TELECOMMUNICATION NETWORK and gives rules for dealing with such equipment in the context of the IEC 60950 series.

Who is DD CLC/TS 62367 - Safety aspects for xDSL signals on circuits connected to telecommunication networks for?

DD CLC/TS 62367 on safety aspects for xDSL signals on circuits connected to telecommunication networks is useful for:

• Telecommunication industry
• Agencies dealing with xDSL signals system
• Technical teams
• Electrical circuit manufacturers

Why should you use DD CLC/TS 62367 - Safety aspects for xDSL signals on circuits connected to telecommunication networks?

xDSL signals are high-speed telecommunication signals that may be present on a telecommunication line, together with:

• Analogue PSTN (Public Switched Telephone Network)
• ISDN (Integrated Services Digital Network) signals; or
• A d.c. power-feeding component

An xDSL signal is characterized by an amplitude of the order of 3 V r.m.s. with superimposed spikes having a very short duration (about 1 μs) and peak values not exceeding 30 V.

When combined with other services as above, the peak voltage can very occasionally exceed the limits for a TNV-3 CIRCUIT. However, the excursions above these limits consist of these very short duration spikes.

There are no published documents from IEC on the effect of such spikes on the human body, but experience with xDSL is that the safety risk, if any, is very small because of:

• The low power of the spikes; and
• The limited accessibility of TNV circuits

DD CLC/TS 62367 gives more detail on the operation of xDSL telecommunication systems, and safety implications of having xDSL signals on circuits in equipment connected to a telecommunication network.