Method of transmitting information and multiplexing device for executing the method 



A method and a TDM multiplexer by which circuit-switched synchronous data and packet-switched asynchronous data are optimally combined for transmission over a common channel. Time slots of variable width are assigned to circuit-switched traffic, while the remaining capacity of the TDM frame is used for transmission of store-and-forward traffic which is inserted in the gaps between assigned time slots in the form of an intermittent bit stream. 

ATM plane merging filter for ATM switches and the method thereof 



Many telecommunication switches operate in dual plane mode for better reliability and maintainability. For ATM switches, it has been difficult to merge cells emerging from two identical planes because of the non-synchronous nature of transmission. An ATM plane merging filter is disclosed. The filter contains memory to store the first of a pair of identical cells under control of filter control means. The filter control means monitors the headers of the cells and sends an enabling signal to the memory for cell storage when no identical cell is in storage. 

System for internetworking data terminal equipment through a switched digital network 



A System including device access, network access system management, and related method for providing users who have require aperiodic high bandwidth data transmission requirements between remote sites access over a public switched digital network of a conventional type is disclosed. The invention uses a scheme of inverse multiplexing by which it first logically splits a high bandwidth information stream into multiple narrow band signals for transmission through public switched digital network over a plurality of narrow band channels to be received at the remote location by another Switched Network Access System then recombined to form the original high bandwidth information stream causing the multiple narrow band channels to appear as a single high bandwidth channel to remote high bandwidth end users. The Switched Network Access System provides automatic bandwidth allocation and agility which optimizes throughput and reduces data communications costs by adding or dropping narrow band channels "as needed" based on user bandwidth utilization. 

Method and apparatus for providing connection identifier by concatenating CAM's addresses at which containing matched protocol information extracted from multiple protocol header 



The present application concerns a method and an apparatus, in a communication network, for processing the various fields of a protocol header preceding a data stream to provide a unique connection identifier for processing the data stream. All relevant protocol information is extracted from the protocol header for look up in a Content-Addressable Memory (CAM) (80). Each time an entry in the CAM (80) matches protocol information applied to the CAM's input (84), the CAM address of this storage section, i.e. the address of a row of the CAM (80), is provided at the output (82) thereof. The CAM addresses obtained from the protocol header are concatenated by means of a Connection Number Builder (CNB, 95) resulting in a unique connection identifier provided at the Protocol Filter's output (96) to be used for the processing of the data stream.