Jonathan k. Creasy wrote:
The only thing I can think of is that since the card supports 3.3v or 5v
PCI slots that maybe on a 3.3v slot it requires the other connection all
the time because it really does need the 5v and is just not picky about
where it comes from.
No, that is not correct. The +5V power pin on the Molex connector is not
even wired to anything on the board, it is completely ignored.
As the others have already said, the FXO modules do not use the +12V
power feed at all. The TDM400P with only FXO modules installed works
just fine without the auxiliary power connector connected to a power supply.
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