IBM All-in-One Super7 Single Board Computer PCM-5896 - Manual (Page 33)

Chapter 2 Installation 21
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COM3/COM4 RI pin voltage select
(J10, J5)
The 9th pin of COM3 and COM4 (9-pin D-sub connector) can be
selected as RI, +5V, or +12V by setting J10 & J5.
COM3 RI pin setting (J10)
RI* +5V +12V
J10
COM4 RI pin setting (J5)
RI * +5V +12V
J5
*default
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Audio output select (J12)
You can select the onboard audio output by setting J12.
"Speaker out" is the output signal amplified by onboard amplifier
Audio output select (J12)
Line out Speaker out *
J12
*default
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