with means for reducing interference; with means for reducing effects due to line faults

Introduced: September 1968

Last revised: January 2006

Full Title

Substation equipment, e.g. for use by subscribers > Interface circuits for coupling substations to external telephone lines > with means for reducing interference; with means for reducing effects due to line faults

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC COMMUNICATION TECHNIQUE
Subclass:: TELEPHONIC COMMUNICATION