[VoIP] DP-compatible ATAs

[Steph Kerman]

Other points I intended to make about this:  Aside from the echo issues 
associated with each 4W/2W transition, every A/D and D/A adds a small 
amount of quantizing distortion.  Toll grade transmission standards 
place a restriction on the number of such conversions.  Another reason 
to avoid inserting * between 2W analog machines if avoidable.  Then 
there is the delay...

Steph


Shane Young wrote:
> Quoting Steph Kerman <stfkerman at jps.net>:
>
>   
>> True but I believe that machines that inherently have metallic 2W trunks
>> should be connected directly together and not go back and forth between
>> 2W analog and 4W digital any more times than necessary.  As long as my
>> DID trunk is delivered on analog copper, I won't be inserting an *
>> between the PSTN and my switches for this reason.  I have no objection
>> to inserting an * between an inherently 4W digital medium like CNET and
>> my switches.
>>     
>
>   
>> In the context of the switching environment under discussion, that's
>> true as long as you don't object to going back and forth 2W analog and
>> 4W digital N times.
>>     
>
> So, let me see if I can summerize your thoughts into this sentance.   
> "If you are going to do it, do it right."
>
> That is how I feel.
>