Abstract: A system for controlling a bandwidth when receiving and reassembling a consecutive data stream transferred while segmented by AAL1 format cells which enables correct determination of non-P and P formats and reassembly of cells even when error arises in multiple bits including the CSI bit of an AAL1 cell or when adding dummy cells and thereby enabling prevention of a gap in data in a frame, comprising, in a data reassembly unit which reassembles received cells, an 8-cell buffer for storing 8 cells of a cycle of a sequence count (SC) of 0 to 7 and sending the cells out to a later stage after a check unit of a sequence number (SN) field confirms normalcy of the cells and a control unit for control so that the number of P format cells stored in the 8-cell buffer becomes 1 cell when 8 cells are stored in the 8-cell buffer.

Abstract: In a packet processing device for controlling a band of a packet, a preprocessor assigns a time stamp to a received packet, and a shared resource portion performs a band control of packets based on reception order information (e.g. time stamp, sequence No.) of the packets distributed to distributed processors.

Abstract: The present invention relates to a line module protection method and a device utilizing that method. According to the line module protection method of the present invention, line module protection is performed by switching the connection from a broken line accommodating module to an auxiliary module. A plurality of line accommodating modules are included in a line accommodating unit connected to the lines in a network. The plurality of line accommodating modules are divided into a plurality of groups, and the auxiliary module is placed substantially at the same distance from all the groups. Thus, a large number of line accommodating modules for performing line module protection can be employed with one auxiliary module.

Abstract: A SOH (101) of a transmission frame of SDH (SONET) is terminated at a sender-side transmitter (3 or 4) and is added to remaining data at a receiver-side transmitter (4 or 3). At the sender-side transmitter (3 or 4), the remaining data (102, 103), including an administrative unit pointer (102) is converted into ATM cells and the ATM cells are sent out to an ATM network (2). After that, at the receiver-side transmitter (4 or 3), the remaining data is restored from the received ATM cells. As a result, operation, administration, and maintenance are independently performed over sections disposed at the input and the output sides of the ATM network (2). Further, processes (conversion to ATM cells, restoring SDH frames) are performed irrespective of the difference between the administrative pointer (102) and a payload (103), and the number of the signal paths (104) multiplexed in the payload (103).

Abstract: A system for controlling a bandwidth when receiving and reassembling a consecutive data stream transferred while segmented by AAL1 format cells which enables correct determination of non-P and P formats and reassembly of cells even when error arises in multiple bits including the CSI bit of an AAL1 cell or when adding dummy cells and thereby enabling prevention of a gap in data in a frame, comprising, in a data reassembly unit which reassembles received cells, an 8-cell buffer for storing 8 cells of a cycle of a sequence count (SC) of 0 to 7 and sending the cells out to a later stage after a check unit of a sequence number (SN) field confirms normalcy of the cells and a control unit for control so that the number of P format cells stored in the 8-cell buffer becomes 1 cell when 8 cells are stored in the 8-cell buffer.