[VoIP] DPO trunks

[Richard Lane]

Hi John / All

Unsure of what a DPO is I googled it to find a myriad of things including:

* Days Payable Outstanding (DPO)
* Democratic Party of Oregon
* "The X Files" D.P.O. (1995)

What is DPO?

Richard

John R. Covert wrote:
> Among the mods that our intrepid Zaptel/Zapata hackers have done
> here, is there anyone who has modified the code to allow a Digium
> TDM4xxP FXS module to support DPO, in particular, the required
> polarity reversal when supervision occurs?
>
> If so, I would like to get it into the official code base.
> I've got an Asterisk/Digium potential customer served out of
> YLKNNTXNDS0, which will not provide any other kind of DIDs
> (and is currently served by this kind of DID).  Well, they
> would give them a PRI for $3500, but the company only needs
> three DIDs.
>
> I actually think they would be better off using their current
> Adtran off a TE110P, but then we have the question of making
> the channel card work in DPO mode.  It might be as simple as
> telling Asterisk that it's E&M, but telling the channel bank
> (as they do today for their SphereCall PBX) that it's DPO.
>
> /john
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