Abstract: A network processor (12) for a voice over Internet protocol phone integrates a universal serial bus port (56), a pair of IEEE 802.3 MACs (70a), a repeater (70b), and a pair of pulse code modulation (PCM) ports (24) such that the network processor can be combined with other peripherals to transmit both voice and data over an Internet protocol network (13).

Abstract: In a module for processing ATM cells of a cell flow on virtual channels of a virtual path that is configured for the insertion of OAM-specific cells with an OAM cell generator, a cell filter and processing unit are provided to which the arriving cell stream is supplied. A connection data memory is provided in communication with the cell filter and processing unit. A scan unit is in communication with the connection data memory and to which a controller is allocated. An intermediate buffer has an input connected to the output of the OAM cell generator. A multiplexer is provided to which the output of the cell filter and processing unit as well as the output of the intermediate buffer is supplied.

Abstract: A network processor (12) for a voice over Internet protocol phone integrates a universal serial bus port (56), a pair of IEEE 802.3 MACs (70a), a repeater (70b), and a pair of pulse code modulation (PCM) ports (24) such that the network processor can be combined with other peripherals to transmit both voice and data over an Internet protocol network (13).

Abstract: A check of the observance of prescribed transmission bit rates in an ATM switching equipment occurs using counter devices (RAM1, ALU) working according to the "leaky bucket" principle. These are individually allocated to virtual connections via the switching equipment (VA). The momentary counter readings of these counter devices are respectively decremented by a variable count value only upon arrival of a message cell of the respective virtual connection. This variable count value is proportional to the time difference between the arrival time of the respective message cell and the arrival time of the message cell of the same virtual connection that immediately preceded it. The transmission bit rates determined for the virtual connections are thereby allocated to defined bit rates classes.