Load management system for an electrical device

Localization of an IP telecommunications terminal over a LAN

Low power line selection circuit for a telephone

Managing power in a line powered network element

Mechanism for preventing clipping of pulse metering signals...

Method and apparatus for a single power supply for dual...

Method and apparatus for adaptive DC level control

Method and apparatus for DC feed

Method and apparatus for detecting a compatible phantom...

Method and apparatus for phantom battery feed

Method and apparatus for ringing

Method and apparatus for supplying power to a twisted pair...

Method and arrangement for choosing supply voltage

Method and device for power supply in telecommunication systems

Method and system for extending backup battery life in...

Method and system for providing DC power on local telephone...

Method for adjusting a ringing signal current in a...

Method for extending the useful life of a cordless telephone...

Mode-dependent, multiple bias-driven battery switch for...

Monolithically integrated telephone circuit for driving...