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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>At my HQ I’m instaling a 128kbit
leased line connection, with guaranteed bandwidth to the Internet; The telco
promises less then 20 ms to the internet (to ronix.ro), no jitter and no packet
loss. So I’m hoping for 40 ms times to net and small jitter </span></font><font
size=2 color=navy face=Wingdings><span style='font-size:10.0pt;font-family:
Wingdings;color:navy'>J</span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'> This is my „hub”.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For my „satelite” instalations
I’m planning on grabing a connection from a different provider (as this telco
provider is expensive) but I’m also considering a 64kbit leased line from
the same provider, just in case my VoIP doesn’t work with the cheeper
providers. My remote instalations will never have more then one „conversation”
load, and this conversation would be ZAP to IAX or SIP. That is, the distant
instalation will need to forward all calls coming in on the zap chanel to my HQ
Asterisk. That’s all it will ever do </span></font><font size=2
color=navy face=Wingdings><span style='font-size:10.0pt;font-family:Wingdings;
color:navy'>J</span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>. I’m not sure „trunking”
woud provide anything in this case as there will never be more then one
concurent conversation from the remote * to my HQ *. I’m expecting IAX to
provide better performance over SIP but not by much. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Considering my remote * instalations will
never have more then one concurent conversation with my HQ and considering I
can get a really good 64kbit line I guess I’m OK. As for my HQ, I’m
sure I’m OK because I’ll get a 128 kbit line and I’ll be able
to afford an upgrade to 256kbit. I can actually go all the way to 2048 kbit,
but that would no longer be economically viable.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>So I’ll see how it goes, and I hope
I’ll have the time to put in a comment on the „low bandwidth”
wiki on voip-info.org.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks to everyone for your help.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'>
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<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com]
<b><span style='font-weight:bold'>On Behalf Of </span></b>tim panton<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, February 02, 2006
11:05 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Asterisk
Users Mailing List - Non-Commercial Discussion</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Asterisk-Users]
(newby) IAX Trunk on low bandwidth connection</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On 2 Feb 2006, at 08:09, Cosmin Prund wrote:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><O:SMARTTAGTYPE namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName">Brrghhh:
Bandwidth calculation is really foggy for me:<O:P></O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><O:P> </O:P></span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Using the calculator I’m getting about 23 kbps for both
incoming and outgoing. What does this mean: Is a 64kbit link used at 71%
capacity ((23+23):64) or is it used at only 35% (23:64)? Will this vary over
time (i.e: does the codec generate more then average data at times? How about
less then average?)</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</O:SMARTTAGTYPE>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>It depends on what sort of link you have. Most links are full duplex
(leased lines etc) which would be 35%<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>but some radio based links are half duplex which would be 71%<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>So for a 64k link you will (just about) get 3 729 calls. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>If all the calls between are between the same two servers, you can use
IAX trunking, which would push<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>you up to 5 calls. (What that tells you is that for 729 and gsm, the
headers are as big as the data).<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>You talk about satellite stations, if you are going for a hub and
spoke, you should put the hub<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>on the highest bandwidth link. <o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><O:P></O:P><O:SMARTTAGTYPE namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"> <O:P></O:P><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>Thanks. <o:p></o:p></span></font></p>
<O:P></O:P>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><O:P> </O:P></span></font><o:p></o:p></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma;
font-weight:bold'>From:</span></font></b><font size=2 face=Tahoma><span
lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
asterisk-users-bounces@lists.digium.com [<a
href="mailto:asterisk-users-bounces@lists.digium.com">mailto:asterisk-users-bounces@lists.digium.com</a>]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Rob Lith<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, February 01, 2006
11:40 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <ST1:PERSONNAME u1:st="on"><st1:PersonName
w:st="on">Asterisk Users Mailing List - Non-Commercial Discussion</ST1:PERSONNAME></st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Asterisk-Users]
(newby) IAX Trunk on low bandwidth connection</span></font><o:p></o:p></p>
</div>
<O:P></O:P>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><O:P> </O:P><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>What codec is that
using. G.729 will give you 10 calls at best over 256k unless you're trunking
with IAX2? I don't know anyone using lpc10...<br>
<br>
Remember a G.729 8k codec turns into 23.63 Kbps with all the overheads... <br>
<br>
Regards<br>
Rob<O:P></O:P><o:p></o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
class=gmailquote><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On 2/1/06, <b><span style='font-weight:bold'>Garth van Sittert</span></b>
<<a href="mailto:garth@bitco.co.za">garth@bitco.co.za</a>> wrote:</span></font></span><O:P></O:P><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'>Hi Cosmin<br>
<br>
You should be able to get about 12 simultaneous calls on a 128k line and<br>
about 28 on a 256k line according to asteriskguru's bandwidth calculator<br>
<a href="http://www.asteriskguru.com/tools/bandwidth_calculator.php">http://www.asteriskguru.com/tools/bandwidth_calculator.php</a>.<br>
<br>
Kind Regards<br>
Garth<br>
<br>
BitCo Data Communications<br>
<a href="http://www.bitco.co.za">http://www.bitco.co.za</a><br>
<br>
Cosmin Prund wrote:<br>
> Hello everyone, this is my first post to the list, so hello again. <br>
><br>
> We're a small company in Romania and we're trying to set up a really small<br>
> version of "call center". That is, we want to get a few
land-lines from our<br>
> telco in different countys and "bridge" all calls to our HQ, in
order to <br>
> make it cheeper for our clients to call us.<br>
><br>
> Unfortunatelly there's no ISP in our area that can deliver a broadband<br>
> connection for anything less then an arm and a leg, so we're considering<br>
> runing an * <-> * connection using VoIP over a low bandwidth
connection<br>
> (we're considering 128kbit but we might be able to go to 256kbit).<br>
><br>
> The bandwidth price is not a problem for our "satelite"
installations, we <br>
> cand get acceptably priced broadband (~256kbit) so the distant *'s will
have<br>
> propper connections.<br>
><br>
> My question:<br>
><br>
> Is 128kbit a wide enough connection for 1 simultaneous conversation, using
<br>
> IAX protocol with the comercial version of the g729 codec?<br>
><br>
> I'm expecting this to be engough for more then 1 conversation (after all a<br>
> single line analog connection is rated at 64kbit and I'm getting double
that <br>
> bandwidth)<br>
><br>
> Cosmin Prund<br>
><br>
><br>
> _______________________________________________<br>
> --Bandwidth and Colocation provided by <a href="http://Easynews.com">Easynews.com</a>
--<br>
><br>
> Asterisk-Users mailing list<br>
> To UNSUBSCRIBE or update options visit:<br>
> <a
href="http://lists.digium.com/mailman/listinfo/asterisk-users">http://lists.digium.com/mailman/listinfo/asterisk-users
</a><br>
> From - Wed<br>
><br>
<br>
--<br>
Garth van Sittert<br>
BSc (Physics & Computer Science)<br>
-----------------<br>
Mobile: +27 (0)83 791 6662<br>
Email: <a href="mailto:garth@bitco.co.za">garth@bitco.co.za</a> <br>
Phone: 08600 BITCO<br>
Web: <a href="http://www.bitco.co.za">www.bitco.co.za</a><br>
<br>
_______________________________________________<br>
--Bandwidth and Colocation provided by <a href="http://Easynews.com">Easynews.com
</a>--<br>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><O:P> </O:P><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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