Abstract: The system comprises a first unidirectional packet bus having a bit rate D, each packet including an e-bit identifier and a b-bit package, sources having differing bit rates d.sub.i such that d.sub.m .ltoreq.d.sub.i .ltoreq.d.sub.M <D, and access means for introducing packets from the sources into the first bus. An allocator located at the receiving end of the first bus builds up frames of identifiers identifying active sources. Each frame has a length T=b/d.sub.m and is shared into N=d.sub.M /d.sub.m time slots. Each time slot has a period .theta.=b/d.sub.M and includes a source identifier. The identifier for a same active source having a bit rate d.sub.i is repeated in the frame n.sub.i times such that n.sub.i =d.sub.i /d.sub.m when d.sub.i /d.sub.m is an integer, or such that n.sub.i =1+ integer part of (d.sub.i /d.sub.m) otherwise. The identifier frames are transmitted from the allocator into a second unidirectional bus distributed to all the access means.

Abstract: An asynchronous time division multiplex switching network for switching multi-service communication data performs point-to-point data switching, data switching between a single calling party and a plurality of called parties, and data switching between plural calling parties and a single called party. The network comprises plural incoming and outgoing time division multiplex highways including asynchronous channels each formed by a packet data and an address label (j, k). Incoming and outgoing terminal switching equipments are respectively connected to the incoming and outgoing highways. A bus interconnects the terminal switching equipments. The labels are converted into several sub-words according to the type of communication switching. In response to the values of these sub-words, the outgoing terminal switching equipments accept or do not accept the packets to be transmitted.

Abstract: Asynchronous time division multiplex switching network for multi-service digital network. It comprises a plurality of time division multiplex bidirectional highways, a plurality of data transmit and receive stations connected to and associated with said bidirectional highways and a plurality of buses connecting these stations therebetween. The highways convey digital data arranged in a hybrid frame including a time slot part formed of a plurality of time slots containing sample words having a variable number of bits and a packet channel part formed of a plurality of channels for packets having a variable number of bits.