Abstract: A method for providing real time indicator of voice transmission quality in a Voice over Internet Protocol (VoIP) network is disclosed. The method allows to receive, at regular time interval during a call, a digital signature from a source call device. The received signature is compared to a referential signature stored on the destination devices, and in case the received signature falls out of the referential signature, a quality indication message is transmitted back to the source call device.

Abstract: A power line connection socket for use with a building power line circuit is disclosed. The power line connection socket includes connectors for connecting the power line connection socket to a building power line circuit, connectors for attachment of an asset, wherein the asset receives power from the building power line circuit through the power line connection socket. The power line connection socket also includes a power line modem for transmission of data via the building power line circuit and a unique identifier associated with the power line connection socket for transmission by the power line modem via the building power line circuit. An asset monitor, associated with an asset, is also disclosed.