All of their power comes off the PCI bus, which is fairly limited
FXS circuits in PCI cards require additional 12VDC not available on the
bus, and supplied from, in many machines, the Hard Drive power connector
John Novack
Philip A. Prindeville wrote:
FXS is exceptional because you're generating power and ringer voltage to
the remote end.
FXO and BRI/PRI are much less power hungry.
-Philip
Josh Mahonin wrote:
Hi Tom,
I couldn't find any stats after a quick Google, but I don't think a PRI
would be too much more power hungry than say, a network adapter. The
FXS/FXO cards are the real pigs, Digium even makes a PCI-mounted
external power unit for them
(http://www.digium.com/en/products/analog/analogpwr.php).
I've only ever used a net5501 with one PCI card, and the general rule we
go by is 12V @ 1.2A - 1.5A just to be sure. If you're just using the
1.0A power supply, especially with a PRI and FXS/FXO line card, you
might run into trouble.
Good luck,
Josh
Tom Chadwin wrote:
Hello
I am looking to build a net5501-based Astlinux install with a
Junghanns miniPCI PRI card
(http://www.junghanns.net/en/singleE1mini_produkt.html). With previous
net5501 builds, I've bought the ordinary Soekris PSU. Is a PRI card
power-hungry, and hence will I need to buy the more powerful PSU? Or
will the standard one do the job? The box will also have an analogue
card installed with 3xFXO and 1xFSO.
Thanks
Tom
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