[Asterisk-Users] Re: How many TDM2400P's will a server take?

[Rob McKrill]

Just figured I'd offer my experience with power restrictions and the 
2400P...

When I purchased a Dell 2800 series tower I found that there were no 
Molex power connectors in the box so I thought I was out of luck if I 
wanted to use *any* FXS card (TDM400 or TDM2400) in this box.  I spoke 
with the guys at Digium about power requirements for the card and ended 
up buying an external power supply (Altech PS-4512: 
http://www.wolfautomation.com/Product.aspx?ProductID=17140&CategoryID=2725) 
, coaxial power connectors and some shrink wrap from Radio Shack.

I can not remember exactly what the power requirements per Quad FXS 
module were but I am sure Digium can provide that.  The guys at Digium 
also mentioned they were looking into an external solution like this for 
the same reason I was -- I just needed a solution that day :)

I would assume you could use a solution like this to provide the 
required power to the X number of cards in a system.  I can post some 
pictures of my solution if anyone is interested.


** Please note, Digium did not suggest this or condone this... **




Juan Carlos Castro y Castro wrote:
>>Juan Carlos Castro y Castro wrote:
>>
>>
>>>Ah -- for all intents and purposes, assume I can obtain the most kickass
> 
> PC
> 
>>>server hardware in the known Universe. So -- any real-life experiences
> 
> out
> 
>>>there?
>>
>>We successfully ran four fully-loaded TDM2400Ps in a server here during 
>>development testing. The configuration was half FXS and half FXO on each 
>>board.
>>
>>I would not recommend running that much load in a single server of FXS, 
>>because the power supply requirements are too great, but if at least 
>>half is FXO then you should be fine. Four TDM2400Ps is the same amount 
>>of Zaptel load as a single quad-port T1 card, so most servers should be 
>>able to handle it.
> 
> 
> Sweet! So -- what are the specs of that server you tested on? Specifically,
> the power supply wattage? My intended use here is all FXS, so I suppose a
> limit of 2 would be reasonable.
> 
> By the way -- don't you think it would be nice if some FXS hardware had some
> way to drain power from somewhere else that the PC's power supply? Forgive
> me if this idea has already been discussed to death there.
> 
> Thanks for the info,
> Juan
> 
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