COURS PROTOCOLE HDLC PDF

PROTOCOLES DE ROUTAGE: pour rôle l’échanges des informations de routes calculées par les Tâches d’une passerelle IP. Pour chaque datagramme IP qui traverse une passerelle, le protocole IP: . Niveau 2: HDLC. Niveau 3: X In this course, we discuss peer-to-peer protocols and local area networks. Part one in this course is to answer the question of how does a peer-to-peer protocol. The field of the invention is that of data transmission in the telecommunications sector, according to the ISO standards track protocol, particularly according to the .

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AT Date of ref document: CH Ref legal event code: The processing device preferably further comprises means for triggering the next cycle of the means for analyzing and processing words, after execution of the current word processing cycle.

The invention relates more particularly to the structure and operation of the module 64, for receiving frames of HDLC operations transmitted on the PCM link The existing system is fully operational, but has the disadvantage of the multiplication of components as many components as assaultand management resulting complexity. Figure 7 shows diagrammatically the assembly of the main elements of the receiving systems of the invention. The end of the signal 96 produces the transient signal 88 which causes the advance of the line counter B1 Designated state s: It should still as many processors 42 with memory 43, there are ways to cope with the needs for the analysis and processing of the received frames and messages they contain.

cours protocole hdlc pdf to word

Other features and advantages of the invention appear on reading the following description protocooe a preferred embodiment of the invention given by way of illustration and not limitation, and the appended drawings in which: However, the absence of the ready signal FIFO 78 inhibits such a cycle.

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The management processor 61 also includes other features: The signal 95 also triggers the operation of a control logic which generates control signals necessary for the performance of a complete operating cycle of the device Method and device for receiving side recognition of the associated data channels of transmitted time division multiplexed data signals.

The invention aims to provide an HDLC frame receiving system transmitted over PCM channels comprising means, common to all channels, analysis and processing of the frames, so as to avoid duplication of identical material means each channel, taking into account that each frame must undergo specific treatment. La fin du signal 96 produit le signal transitoire 88 qui provoque l’avance du compteur de voies In each PCM frame, each channel sees reservations same predetermined rank byte.

System according to claim 1 characterised in that it cooperates protocolw an automatic analysis processor 76 comprising: GB Free format text: This processing information 81 is read together with the data 71 by the controller 76 which thus identifies the appropriate treatment for the outgoing data.

cours protocole hdlc pdf to word – PDF Files

The transcoding memory 80 works in cooperation with the following modules: On both interfaces of the coupler 57 with the PCM bus 52, 53, only one is active at a given time, under control of an access control processor 61 Figure 6. The operation of the state diagram is as follows: L’octet IT0 contient un signal de synchronisation. A1 Designated state s: DE Date of ref document: The byte TS0 contains a synchronization signal.

SE Free format text: Another object of the invention is to provide such a system for receiving and processing protocold, together with a standard processor, reduces the execution time of repetitive frames of analysis.

Elementary switch for automatic switching unit using an asynchronous multiplexing technique. BE Free format text: IT Free format text: The ROC field is reset on event “end of frame or fault detected”, but keeps its value to “incomplete byte”.

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The embodiment of the inventive system will be described more precisely in relation to a data switch as shown in Figure 5. The address is composed, as shown, the signals 79, 72, 78, characterizing the state or type of procedure applied to the channel concerned INFthe number of bytes received since the beginning of a frame current ROCif applicable, a status information which depends on the circumstances of the delivery of the byte received or should be in the frame 90 to 93 according to the table provided beforehand, and the state, occupied or empty, the FIFO as described above.

Frame start, frame end, error, etc. CH Free format text: Each of the lines 44 corresponding to a distinct channel feeds a common memory remultiplexing 47 which concentrates the decoded frames 48 before they are transmitted on a 50 processing bus 49 with processor 3 ISO level. Advantageously, said transcoding means cooperating with said controller comprising: The data stored in the FIFO 73 is then read by the means 74 of analysis and processing of words.

The operation means 70 for HDLC decoding is as follows. It is known, in this direction, to perform the functions of the circuit 41, for multiple channels multiplexed in time, using a single circuit multiplexed channels having a state memory, and the receipt of a byte from each channel in a frame, reading from the memory the state of the channel stored in the previous frame, in order to resume processing of the track, as it had been left after the receipt of a byte of that channel in the preceding frame.

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