[Soekris] Digium TDM400P (2 FXS, 2 FXO) on net5501

[Steve Holdoway]

The Digium TDM400P has an external power socket to power the ringer for the extensions (top right on the link, hidden behind the daughter boards), so it's a bit of a non-question in this case, really (:

Steve

On Tue, 31 Jul 2007 01:08:38 -0700
Graham Freeman <graham.freeman at cernio.com> wrote:

> 
> Hi, folks,
> 
> First of all, I'd like to extend my hearty thanks to Soekris  
> Engineering for producing an excellent product line.  I've deployed  
> net4501- and net4801- based firewall/VPN endpoints (mostly running  
> m0n0wall[1]) for a number of clients, and the results have been truly  
> excellent.  Sturdy, reliable, and powerful enough to do the job.
> 
> So, in the process of experimenting with VOIP I'm getting my hands  
> dirty with various distributions of Asterisk on various hardware  
> configurations.   For my own home office PBX, the Soekris net5501  
> seems to be the best fit - it makes no noise whatsoever, is  
> physically small, consumes very little power, seems to be powerful  
> enough for my needs, and has room for an FXS/FXO[2] adapter card.    
> Best of all, AskoziaPBX[3] is rapidly shaping up to be an excellent  
> Asterisk implementation well-suited to the net5501, much in the same  
> way that m0n0wall is an excellent firewall/VPN endpoint.
> 
> Here's my question:  Will the Digium TDM400P[4] (with 2ea S110M FXS 
> [5] and X100M FXO[6] modules) work in my net5501?  If so, will I need  
> a supplemental power supply such as the Digium PWR2400B[7]?  If so,  
> any suggestions on how I'd shoe-horn it into the case after  
> installing the TDM400P?
> 
> I saw the April 2006 thread on this list about the TDM400P on a  
> net4801, in which Kevin Fleming wrote[8] that "the ringing generators  
> on the FXS modules require more
> current on the 12V power supply than the PCI spec allows."  This  
> sounds plausible, but can someone confirm?
> 
> On a related note, I currently (heh heh) have the 1.5A power supply  
> for my net5501.  So far it's been sufficient for the experimentation  
> I've done.  However, I'm happy to pick up the 2.5A supply if adding  
> the TDM400P (+ modules) and a 2.5" hard drive will require me to do so.
> 
> FWIW, I'm confused about the power requirements after having done  
> some homework and come up with this:  The Digium web site says that  
> the TDM400P is a PCI 2.2 card[4].   The Soekris web site says that  
> the PCI slot on the net5501 is 3.3v only.   I'm not clear after  
> skimming Wikipedia article[9] on PCI as to whether PCI 2.2 is 3.3v- 
> only or if it's just that 3.3v is a commonly used implementation.    
> Obviously, I'm not an expert in such things.
> 
> Any advice/feedback would be appreciated.
> 
> thanks,
> 
> Graham Freeman
> General Manager, Cernio Technology Cooperative
> Email/Jabber:  graham.freeman at cernio.com
> +1 415 462 2991 home office (0900 to 2100 San Francisco time)
> www.cernio.com
> 
> 
> [1] m0n0wall - http://m0n0.ch/wall/
> [2] FXS = the port you'd plug an analog phone into.  FXO = the port  
> you'd use to connect to an analog telco line.
> [3] AskoziaPBX - http://askozia.com/pbx
> [4] TDM400P - http://www.digium.com/en/wheretobuy/digiumdirect/ 
> productview.php?product_code=1TDM22BRF-02
> [5] S110M FXS module - http://www.digium.com/en/wheretobuy/ 
> digiumdirect/productview.php?product_code=1S110MF-01
> [6] X100M FXO module - http://www.digium.com/en/wheretobuy/ 
> digiumdirect/productview.php?product_code=1X100MF-01
> [7] PWR2400B power supply - http://www.digium.com/en/wheretobuy/ 
> digiumdirect/productview.php?product_code=1PWR2401BLF-01
> [8] Thread on TDM400P with net4801 - http://lists.soekris.com/ 
> pipermail/soekris-tech/2006-April/010231.html
> [9] Wikipedia article on PCI - http://en.wikipedia.org/wiki/ 
> Peripheral_Component_Interconnect
> 
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