[182529] in North American Network Operators' Group
Re: SIP trunking providers
daemon@ATHENA.MIT.EDU (Owen DeLong)
Mon Jul 20 16:58:03 2015
X-Original-To: nanog@nanog.org
From: Owen DeLong <owen@delong.com>
In-Reply-To: <CAJB2g-G5yfY3SFtptHr_nYUH4NpP82R2j3pY7Epc-o=qgCtFHw@mail.gmail.com>
Date: Mon, 20 Jul 2015 13:57:52 -0700
To: Rafael Possamai <rafael@gav.ufsc.br>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
FWIW, I don=E2=80=99t know where their root nodes are or where their =
proxies are
located, but I=E2=80=99ve had excellent service from CallCentric for =
several years.
They=E2=80=99ve just plain worked everywhere I=E2=80=99ve tried in =
first-world countries and
generally fairly well even in places that were network challenged like =
Rwanda
~5 years ago, Haiti ~3 years ago, Suriname, Morocco ~6 years ago, etc.
They=E2=80=99ve even worked pretty well from most of the hotel WiFi =
networks where
I have attempted to use them.
I given them $1.95 per month and something around a penny per minute
on the rare occasion when I use the service. This gets me a DID number,
as well as outgoing service with customized caller-ID mapping. =
Admittedly
this is for a single-line rather than SIP trunking, but I believe they =
also offer
trunking services.
Owen
> On Jul 20, 2015, at 08:21 , Rafael Possamai <rafael@gav.ufsc.br> =
wrote:
>=20
> When I originally posted the thread, I had asked Chicago due to =
physical
> proximity, and my assumption being the lesser the number of hops, the =
lower
> the probability of running into issues (latency, jitter and =
congestion). On
> the other hand, one of my sandboxes are out of Las Vegas and I haven't =
had
> any issues yet, but the number of test calls I've ran aren't enough to =
say
> with confidence that distance and hops don't matter (indirect ways of
> measuring latency, etc).
>=20
> Another thing is, having your packets stay in Chicago and in Chicago =
only
> is a nice thing, the efficiency of your overall system would be higher =
for
> what it's worth, but as an example, the 2nd hop this e-mail is taking =
to
> get delivered to Nanog is about 100 miles, who knows about the other =
ones.
>=20
>=20
>=20
> On Mon, Jul 20, 2015 at 8:49 AM, Naslund, Steve <SNaslund@medline.com>
> wrote:
>=20
>> 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
>> distribution 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 impairments 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 that they are just not as reliable as TDM. The average
>> internet connection just does not meet the reliability standards that =
the
>> TDM voice network has achieved. IP networks are affected by =
congestion and
>> routing issues whereas the TDM network seldom has these type of =
problems.
>> An outage on a TDM circuit 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 country over IP when he is exiting locally most =
of the
>> time.
>>=20
>> 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.
>>=20
>> Steven Naslund
>> Chicago IL
>>=20
>>=20
>>> If you=E2=80=99re going to the PSTN, who gives a shit where you do =
the
>> interconnect as long as its within 100ms.
>>>=20
>>> If most of your calls are VOIP<->VOIP within Chicago, then it makes =
some
>> sense to set up a box and just send the external calls out to the =
trunking
>> provider where >you no longer really care where they are.
>>>=20
>>> Absent significant network suckage, there=E2=80=99s no place in the =
contiguous
>> US that isn=E2=80=99t within 100 ms of any other place in the =
contiguous US these
>> days.
>>>=20
>>> Owen
>>=20
>>=20
