SFP+ loopback adapter module's are used for testing SFP+ ports on boards and switches. The loopback provides a cost effective method for SFP+ port testing. Transmitting data from the host electrically routed, to the receive data outputs and back to the host. Since the SFP+ loopback module does not contain laser diodes or photodiodes, it provides a very cost-effective way to test ports.
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