Apparatus for the current supply of a subscriber set from an exc

Arrangement for supplying current to a subscriber telephone set

Circuit for regulating current in a PBX loop

Dynamic impedance element for a battery feed circuit

Method and apparatus for powering a DS3 device

Method and device for distributing electric power in...

Method for communication with no power feed and exchange for rea

Power down feed

Power line telephony exchange

Power line telephony exchange

Power supply for telephone exchange

Power transmission arrangement for telecommunications systems

Replacing telecommunications carrier equipment

Supply for a subscriber control system

System and method for reducing power dissipation in line...

Telecommunication system with energy-saving mode

Terminating circuit in a battery feed circuit of an electronic e