| [GMCnet] new router/phone box To: gmclist@temp.gmcnet.org [message #166155] |
Thu, 12 April 2012 16:53  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Senior Member |
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Hi Richard,
Voice Over Internet Protocol has been around for quite a while. It works really well if you have a very fast, reliable internet service, ideally something up in the 5mb down or faster range. On slower connections you may experience frequent drop outs or dropped calls. Good for home based use if you have the fast internet, but likely not ideal when on the road and connecting through a variety of internet sources or slower 3g cell phone towers. Thanks for the link and the suggestion.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
541-592-5360
www.southernoregonguild.org
www.siskiyouguild.org
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Message: 16
Date: Thu, 12 Apr 2012 09:30:14 -0500
From: Richard <bukzin@gmail.com>
Subject: [GMCnet] new router/phone box
To: gmclist@temp.gmcnet.org
Message-ID: <288e1.4f86e6f4@gmc.mybirdfeeder.net>
Content-Type: text/plain; charset="ISO-8859-15"
Jerry, Gene, Dan etc
Here is some info on a new devise which allows call management,
faxing, VoIP etc.
Works with iphone and Android too.
You guys may want to check it out for your talk at the rally.
http://www.amazon.com/OBi202-Phone-Adapter-Router-2-Phone/dp/B007D930YO/ref=sr_1_12?s=electronics&ie=UTF8&qid=1334240338&sr=1-12
and
http://michigantelephone.wordpress.com/2012/04/12/heres-one-use-for-the-obihai-obi202s-usb-port-wifi-connectivity/
Looks like an great new entry to this category.
--
Bukzin
1977 Palm Beach
Chico California
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] new router/phone box To: gmclist@temp.gmcnet.org [message #166168 is a reply to message #166157] |
Thu, 12 April 2012 19:08  |
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Mark
Have you tried to prioritize protocals on the router?
ex:
http://www.evdoinfo.com/content/view/873/63/
bdub
On Thu, Apr 12, 2012 at 5:55 PM, A. <markbb1@netzero.com> wrote:
>
>
> glwgmc wrote on Thu, 12 April 2012 16:53
> > Hi Richard,
> >
> > Voice Over Internet Protocol has been around for quite a while. It
> works really well if you have a very fast, reliable internet service,
> ideally something up in the 5mb down or faster range. ...
> VoIP itself uses very little bandwidth. 256k (up and down) is more than
> enough for telephone company quality conversations (I did some quick
> calculations on datagram size including headers and came to about 196k).
> My home connection is 1.5Mb up and 256k down and Vonage works fine almost
> all of the time. But if the CFO is watching videos and the kids are online
> gaming at the same time someone is trying to talk on the VoIP line, it is a
> lost cause.
> --
> '73 23' CanyonLands
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bdub
bdub.net
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| Re: [GMCnet] new router/phone box To: gmclist@temp.gmcnet.org [message #166169 is a reply to message #166157] |
Thu, 12 April 2012 19:16 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Phone company long distance carriers that we have all used since the 1960's used 64k bps for each voice call. Since then we went to 32 k and in some cases 24 or 16 K for call transport.
When we got to VOIP, the bandwidth required was even lower because we do not transmit the silence gaps in the voice stream. Steady steam audio like fax machines and music on hold take more bandwidth than normal voice because there are no gaps.
What affects voice reliability is latency or unstable latency. Though the bandwidth requirement is not much (I have run digitized voice on dial up connections of 48 k or less), the IP packets must all arrive on time with very little retransmission. I broadcast the GMC Eastern States Rally on a pay phone dial connection about 8 years ago at 48 kbps with not problems.
Most voice protocols do not retransmit missing or bad voice packets because getting there late is worse than not arriving at all. If one voice packet arrives is 30 milliseconds and the next one arrives in 900 milliseconds you will not be able to to reproduce voice on the receiving end reliably. There is more behind this like prioritizing packets, etc. that I won't go in to here.
The end result is that on time (stable time) error free packet delivery and not bandwidth is what you are looking for.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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