Abstract: A digital telecommunication station is provided, operative in a telecommunication network to receive at least two different types of signals and divert signals of at least one of these types from the transmission path along which signals of the other types are transmitted.

Abstract: A method and devices using that method are provided for reconstructing an encoded signal conveyed along a communication path in a packet switched network. The method comprises the steps of providing a communication signal that has been encoded into a plurality of frames; determining which of the plurality of frames is an essential frame, which loss would cause a relatively substantial deterioration in the quality of at least one proceeding frame upon decoding that at least one proceeding frame; packaging the plurality of frames into a plurality of packets, and identifying which of the packets comprise at least one essential frame; adding protecting information to at least one packet which proceeds a packet identified as a packet carrying at least one essential frame.

Abstract: A method and apparatus are provided for managing varying traffic loads in a packetized communication network. At a predefined location, the instantaneous demand for bandwidth required for delivering traffic via a plurality of active channels is compared with the available bandwidth. When the available bandwidth at that pre-defined location is less than the bandwidth required to convey the signals carried along all these active channels, a rate adjusting mechanism is applied to at least one of the active channels, while repeating this check periodically.

Abstract: A method and devices using that method are provided for reconstructing an encoded signal conveyed along a communication path in a packet switched network. The method comprises the steps of providing a communication signal that has been encoded into a plurality of frames; determining which of the plurality of frames is an essential frame, which loss would cause a relatively substantial deterioration in the quality of at least one proceeding frame upon decoding that at least one proceeding frame; packaging the plurality of frames into a plurality of packets, and identifying which of the packets comprise at least one essential frame; adding protecting information to at least one packet which proceeds a packet identified as a packet carrying at least one essential frame.

Abstract: Method and device are provided for processing a packet conveyed in a packet switched communication network. By the invention, a processing indication is associated with the packet, where the indication is adapted to provide instruction(s) for the processing of the packet, and the indication is determined in accordance with the payload carried by that packet.

Abstract: A method and apparatus are provide for managing varying traffic loads in a packetized communication network. At a predefined location, the instantaneous demand for bandwidth required for delivering traffic via a plurality of active channels is compared with the available bandwidth. When the available bandwidth at that pre-defined location is less than the bandwidth required to convey the signals carried along all these active channels, a rate adjusting mechanism is applied to at least one of the active channels, while repeating this check periodically.

Abstract: A method is provided for use with a telecommunication relay device adapted to convey voice-band data signals over a given transmission path in a telecommunication network, which relay comprises a transmitter operative to encode and transmit voice-band data information, and a receiver operative to receive and decode said information and regenerate a voice-band data signal therefrom. The method that is provided comprises handling an echo associated with the regenerated signal and returned from the telecommunication network, in order to prevent it from being relayed backwards, thus impairing the voice-band data call process. The method comprises detecting and identifying the returned echo as such, and preventing it from being relayed.

Abstract: A converter operative in a digital telecommunication system to receive signals coded at a first compression mode and convert them into a second compression mode. The conversion provided, leads to substantially less impairments in the decompressed form of the signals converted into the second compression mode, had the signals received been decompressed from the first compression mode into their decompressed form followed by compressing these decompressed signals into the second compression mode, and decompressing the signals thus obtained.

Abstract: A method of transmitting packets from a transmitter to a receiver. The method includes providing a first packet including a header, transmitting a leading part of the first packet on a link from the transmitter to the receiver, the leading part not including a header separate from the header of the entire packet, and transmitting a second packet on the link after the leading part of the first packet was transmitted and before a remaining part of the first packet was transmitted.

Abstract: Variable-rate encoding apparatus operative to receive data and process the data for transmission through an asynchronous transfer mode network. A processor determines a degree of circuit congestion associated with at least one virtual circuit of the network. A variable-rate encoder encodes the received data so as to provide encoded data packets to the at least one virtual circuit at a rate that is selected responsive to the degree of circuit congestion. An ambiguity resolving field is preferably added to at least some of the data packets so as to resolve ambiguity regarding encoding rate.