| 摘要 |
Transmission system for ATM cells between a central station and local stations. In each local station, a cell being presented is stored in a cell buffer. In addition, a first character is written to a register. If an empty time slot is being presented, a second character is written to the register. The registers are read periodically. The content thereof is transmitted to the central station in the form of register codes. The central station transmits, on the basis of the location of the first characters in said register codes, permit codes to the local stations. With the aid of the presented system, it is possible, in practice, to bridge a distance of 20 kilometres between the local stations and the central stations, said distance hitherto having been approximately 10 kilometres. The system is simple, but, owing to the FIFO behaviour, has an excellent performance. <IMAGE>
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