Re: how can I use RJ45 as telephone line
Yes, strip off the rj-45 connectors from each end. Put 2 or 4 (depending on the phone cord your making) into a phone-line connector and crimp it. Then put the same color cables in the same order on the other end into a phone-line connector and crimp it. The excess wires can be trimmed so they are not hanging out of the cable.
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