Re: SIP trunking providers

[Mike Hammett <nanog () ics-il net>]

I want the gateway in Chicago as well. 

I am Chicago based. The end users are Chicago based. Therefore the origination would be coming from a Chicago area 
gateway. Half of the calls (inbound would be guaranteed to be local as they'd be coming in through a local tandem 
anyway. Most of the termination traffic would again be to local numbers, therefore would again have to be through local 
tandems. 




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

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

From: "Nathan Anderson" <nathana () fsr com> 
To: "Mike Hammett" <nanog () ics-il net> 
Cc: nanog () nanog org 
Sent: Monday, July 20, 2015 4:11:37 AM 
Subject: RE: SIP trunking providers 

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