I found the comment about 5000mS latency so interesting, so I ran some tests on
international connections.
there are lots of free tests available.
this discusses a good set of choices :
http://compnetworking.about.com/od/speedtests/tp/Internet-download-speed-tests.htm
this tests your local connection for jitter and other QOS issues:
http://www.megapath.com/speedtestplus/
Ookla speed tests has lots of test servers all over the place, but reports ping
time, which I assume is roundtrip (?), while speakeasy speed test reports
latency. Not sure if that is one way to the server they are using, most likely
roundtrip too.
I got somewhat different but repeatable results , so likely just different
servers they were accessing?
Now this is testing at 2AM in CA, so not exactly peak US traffic times, but I
was mostly interested in pinging servers outside of US, as internally in US
when on wired isp, I have not had voip QOS issues.
South Africa capetown 300mS (midday SA time)
Calafarte in southern Argentina, in the pampas : 270mS "ping" (middle of the
night)
For USA comparison:
Washington DC,NY,NJ : all ~ 63mS "latency" 100mS "ping"
San Francisco (20mi away) ~22mS "latency" 28mS "ping"
yellow knife in Canada ,farthest North server,140mS "ping"
st Croix in Caribbean 130mS "ping"
mobile AL USA 90mS "ping"
Melbourne Australia 305mS "ping" (10pm local time) but connection seemed flakey
and failed upload test
Dusseldorf Germany 190mS "ping" (~ midday)
Honolulu Hawaii (104mS) middle of night
Irkutsk Siberia 260mS "ping"
addisadiba ethiopia 800mS "ping"
Raleigh NC 104mS "ping"
Interesting to check USA speeds at normal peak hours, maybe when Netflix is
streaming heavily in early evening?
If North Carolina slows to 5000mS ,you may have better luck calling Irkutsk or
even Addisabiba !
Skype to skype, is peer to peer, so should find an approximately optimal
routing, I wonder how that fares versus dedicated but longer routing that Ken
describes?
However when calling to many international **landlines**, skype aparently gets
routed through europe, so calling an australian landline on skype, is going to
have a lot more delay.
Tim
________________________________
From: Ken Norton <ken@xxxxxxxxxxx>
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, December 3, 2014 9:13 AM
Subject: Re: [OM] Changing the question: was: Any suggestions for a VOIP
provider?
> Changing the question. How about a simple long distance provider as I used
> to have many years ago? One where you dial the service number and then the
> number you're calling.
Buggy whips.
They still exist, but barely. Many of us have free long-distance as
part of our cell-phone plans. Check with Verizon, ATT and Sprint for
those packages. The free long-distance is for your land-line phone,
but is tied in with your monthly cell-phone contract. I think you can
still find pre-paid long-distance calling cards at Wal-Mart.
The thing about VoIP is that there are two "types" of VoIP. There is
the carrier-provided VoIP and then there is the "skype" type of VoIP
which uses your Internet connection to attempt to do real-time
communications over a network designed for non-real-time data. Carrier
VoIP is a different animal because it uses VoIP technology/protocol,
but uses dedicated "pipes" for the purpose. When you are checking your
email, it doesn't matter much if the latency on your broadband
connection is 5ms or 5000ms. But if you are trying to talk over that
same connection, it really does matter. Keep in mind that the majority
of VoIP (via the Internet) sessions terminate to one particular phone
switch in Las Vegas. A call from the Carolinas to somebody in New York
will have about a one second delay--on a good day.
Businesses with SIP phones that want to stay in business don't use
Internet connections for their telephone service.
AG Schnozz
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|