[182545] in North American Network Operators' Group
RE: SIP trunking providers
daemon@ATHENA.MIT.EDU (Nathan Anderson)
Tue Jul 21 00:53:19 2015
X-Original-To: nanog@nanog.org
From: Nathan Anderson <nathana@fsr.com>
To: "Naslund, Steve" <SNaslund@medline.com>, "nanog@nanog.org"
<nanog@nanog.org>
Date: Mon, 20 Jul 2015 21:53:09 -0700
In-Reply-To: <9578293AE169674F9A048B2BC9A081B401C70ABA80@MUNPRDMBXA1.medline.com>
Errors-To: nanog-bounces@nanog.org
Okay, fair enough. I guess I made the assumption somehow that Mike was con=
cerned solely about latency, which if that's all he is concerned about, the=
n the points you bring up would largely be strawmen. But I just re-read Mi=
ke's post, and he doesn't state his reasons for wanting the local gateway. =
It must have been Dovid's reply that planted the seed of the idea in my mi=
nd that Mike was primarily concerned about latency.
-- Nathan
________________________________________
From: NANOG [nanog-bounces@nanog.org] On Behalf Of Naslund, Steve [SNaslund=
@medline.com]
Sent: Monday, July 20, 2015 6:49 AM
To: nanog@nanog.org
Subject: RE: SIP trunking providers
End to end delay is not the most limiting factor. Jitter is the issue and =
packet drops are the other issue that matters (more importantly the distrib=
ution of drops). I think the best reason to select the local provider over=
the distant one is that the sooner he gets off the IP network the less imp=
airments he will run into. The TDM network as antiquated as it is, is less=
susceptible to congestion and call impairments than an IP backbone network=
is. I can tell you from running a bunch of International VOIP networks th=
at they are just not as reliable as TDM. The average internet connection j=
ust does not meet the reliability standards that the TDM voice network has =
achieved. IP networks are affected by congestion and routing issues wherea=
s the TDM network seldom has these type of problems. An outage on a TDM ci=
rcuit rarely affects other TDM circuits so they see a lot less higher level=
outages. I can understand why he does not want to haul his voice cross co=
untry over IP when he is exiting locally most of the time.
Yes, I understand that the carrier might very well be hauling that traffic =
via IP even after he gets to his gateway point but at that point it becomes=
their problem to deal with.
Steven Naslund
Chicago IL
>If you=92re going to the PSTN, who gives a shit where you do the interconn=
ect as long as its within 100ms.
>
>If most of your calls are VOIP<->VOIP within Chicago, then it makes some s=
ense to set up a box and just send the external calls out to the trunking p=
rovider where >you no longer really care where they are.
>
>Absent significant network suckage, there=92s no place in the contiguous =
US that isn=92t within 100 ms of any other place in the contiguous US these=
days.
>
>Owen
