10
Loop Back Connectors
In order to run the RS232 serial port, parallel port, and SCSI port self-test, a loop back connector
is needed. The loop back may be placed on either the OmniBook port or at the end of the
corresponding cable. This feature is also helpful in diagnosing a defective serial, parallel, or
SCSI cable.
Loop back connectors may be purchased or can easily be constructed. The following illustrations
identify the correct pin-out configurations for the serial, parallel, and scsi loop back connectors.
Figure 5 - Serial Loop Back Connector
Figure 6 - Parallel Loop Back Connector
Figure 7 - SCSI Loop Back Connector
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