[asterisk-users] Electric usage of a tdm400p

[Erick Perez]

Well Im planning to use a mini-itx, a laptop hdd and a 4fxs digium card.
the mini-itx comes with a 60W DC to DC adapter (80W peak).
So I need power to manage the hdd, motherboard,the tdm card.
A disk cable can be made available, but is not present as a factory default.

So My real concern is power.


On 10/18/06, Bob Chiodini <bchiodini at gmail.com> wrote:
> On Tue, 2006-10-17 at 11:59 -0500, Erick Perez wrote:
> > Hi people,
> > When you use a TDM400p with 4FXS i know i need to connect a 12V
> > connector to power the FXS lines.
> > Im not good at electric stuff so I ask...If I have a 60W DC to DC
> > adapter (80W peak) then, how much power will the TDM 400P consume? can
> > it be powered?
> >
> >
> Erick,
>
> Per http://en.wikipedia.org/wiki/Ring_(telephone) in the US the ring
> voltage is around 90VAC (20 Hz) with a current of 30 milliamperes (REN
> ~5).  This translates to 2.7 watts.  Assuming a DC/DC converter
> efficiency of 38% (probably low), you would need about 3.7 watts, per
> FXS module.  About 15 watts, total.
>
> What is the TDM card installed in and is a disk drive cable available?
>
> Bob...
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-- 
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Erick Perez
Panama Sistemas
Integradores de Telefonia IP y Soluciones Para Centros de Datos
Panama, Republica de Panama
Cel Panama. +(507) 6694-4780
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