| http://www.w3.org/ns/prov#value | - This example of the invention uses one of the spare pairs for signal detect(denoted SD+/-) and the other for power (ISOL+/-).Broadly as shown in FIG. 1 and as will be more particularly described with reference to FIG. 2, the SD+ pin of transceiver 9 is connected to the input of a differential driver which is connected by way of lines 16 to respective pins on a RJ45male plug 8a (FIG. 2), the corres
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