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Yes. Wiring diagrams for 9-pin and 25-pin serial port loopbacks and 25-pin parallel port loopbacks are posted on our website. This information is provided as a courtesy to our customers. PC-Doctor does not offer assistance for problems related to personally manufactured loopback adapters.

The global leader in system health technologies, PC-Doctor brings 30 years’ experience developing and delivering effective diagnostic and system health solutions that reduce service delivery costs, improve customer experience, enable a proactive, predictive environment and provide a channel for contextual support messaging and APOS revenue.

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