| 摘要 |
A data network switch for switching data between a plurality of data links comprises programmable control means (30, 31) for adapting the data switching in accordance with fulfilment of any one of a plurality of predetermined conditions, e.g. failure of, or error on, one of the data links, or a time of day. The switch uses an interpreted language (Switch Control Language, or SCL) in which each line is in the form of a task, the tasks being run simultaneously, permitting any of them to be triggered as soon as the relevant condition is fulfilled. <IMAGE>
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