[VoIP] DPO trunks

[John Novack]

Dial Pulse Originate

John Novack


Richard Lane wrote:
> 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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>>   
>>     
>
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>   

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