RE: SIP trunking providers

[Nathan Anderson <nathana () fsr com>]

Maybe I'm missing something here, but what does it matter if the RTP from your perspective ends in Chicago or not?  If 
it does end in Chicago, that only means they are proxying the audio before sending it on to the actual media gateway 
for that call where it finally drops onto the PSTN.  So all that happens is that the audio latency remains the same (or 
worse, because of the additional, unnecessary proxy) AND that the actual media gateway remains hidden from you.  You 
won't be able to actually test and see the latency to the MG, and you will be under the (false) impression that latency 
across all calls is equally "good" because you are only measuring RTT to a specific and common media proxy.  By sending 
the audio directly to an MG closer to the point of exit from IP-land, it is taking a more direct route to the callee 
than you are seemingly asking for.

If you're not talking about adding a proxy to the equation, are you expecting to find a provider in Chicago that 
immediately goes from IP to PSTN within Chicago, regardless of the actual destination of the call?  Circuit-switched 
TDM is not a no-latency connection.  Physics is involved here.  The farther apart the caller is from the callee, the 
more latency there will be, regardless of the medium.  All other things being equal (similar network path, etc.), I 
doubt IP packet switching significantly increases the latency over and above TDM call trunking.  But I'm not an expert, 
and again, if I'm missing something here, I would love to be proven wrong.

--
Nathan Anderson
First Step Internet, LLC
nathana () fsr com

________________________________________
From: NANOG [nanog-bounces () nanog org] On Behalf Of Mike Hammett [nanog () ics-il net]
Sent: Sunday, July 19, 2015 1:04 PM
Cc: nanog () nanog org
Subject: Re: SIP trunking providers

I too am looking for the Chicago area. Low volume. I'm looking for people whose SIP and RTP hit the end of the road in 
Chicago. Not interested in someone whose SIP servers are in LA , but will redirect me to the nearest gateway... without 
telling me where said gateway is.




-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com

----- Original Message -----

From: "Rafael Possamai" <rafael () gav ufsc br>
To: nanog () nanog org
Sent: Friday, June 19, 2015 4:40:48 PM
Subject: SIP trunking providers

Would anyone in the list be able to recommend a SIP trunk provider in the
Chicago area? Not a VoIP expert, so just looking for someone with previous
experience.


Thanks,
Rafael