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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'>If you’re going to have to open
ports on your firewall for SIP anyway, then why not put the server on the
inside? That being said, I don’t know if you’d need to punch holes
for the phones being trusted and the server on the outside.. <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'>Personally I don’t like the ideas of
having a server outside, but maybe I’m too paranoid?!<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>
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color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> Warren [mailto:warren-lists@icruise.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, June 19, 2006 1:23
PM<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] How
to use a data T-1?</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>So let's assume I am going to use G.729A. I am
looking at using Polycom IP601 phones which support G729A directly, so the only
licenses I believe I would need are for the calls going to voicemail or in the
menu system at once - realistically that number never exceeds 5 simultaneous,
since the phones can handle the CODEC and no transcoding is needed, so those do
not need licenses according to <a
href="http://www.voip-info.org/wiki-Asterisk+G.729+Licensing">http://www.voip-info.org/wiki-Asterisk+G.729+Licensing</a>.<br>
<br>
It looks to me like, for testing, I can get a couple of the polycom phones and
have a server using an IP on the unused T1.<br>
<br>
Assuming that is correct (which I will write up as an article for the Wiki if
anyone is interested when this is all done), the next thing I need is a
provider of VoIP service. Also, it seems like the server would go on the
outside of my firewall with holes punched through for the phones which would be
on the <st1:State w:st="on"><st1:place w:st="on">ind</st1:place></st1:State>=side
of the firewall. Would that be correct?<br>
<br>
W<br>
<br>
Steve Langstaff wrote: <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Remember to add the RTP, UDP and IP
overheads.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>And then just do the math.</span></font><o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> <a
href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a>
[<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>William Piper<br>
<b><span style='font-weight:bold'>Sent:</span></b> 19 June 2006 17:12<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] How
to use a data T-1?</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Depends on the codec. If you are using ulaw, you will
only be able to have about 23 calls. If you use g729 you can have as many as
187 simultanious calls on a data T1.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black 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 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Remember, you have 1544Kbs of bandwidth. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>g279=8Kbs per call<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>uLaw=64Kbs per call<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black 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 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Just do the math.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black 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 color=black face="Times New Roman"><span
style='font-size:12.0pt'>bp<br>
<br>
<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=gmailquote><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>On 6/19/06, <st1:City
w:st="on"><st1:place w:st="on"><b><span style='font-weight:bold'>Warren</span></b></st1:place></st1:City>
<<a href="mailto:warren-lists@icruise.com">warren-lists@icruise.com</a>>
wrote:</span></font></span> <o:p></o:p></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Steve,<br>
<br>
I want to end up with a system that will let me send and receive voice<br>
calls. I guess what I want to do depends on the best way to do that.
<br>
Can I do more than 23 (decent sounding) voice calls on a data T-1 with<br>
someone else handling the final part of the call to the copper for me?<br>
If so than that is my likely final destination.<br>
<br>
I have a channelized voice T-1 currently plugged into my meridian <br>
system, but I would like (if realistically possible) to do as much of<br>
this over IP as possible for maximum flexibility. Is that a pipe
dream<br>
or just silly given the current state of technology?<br>
<br>
I am lucky enough to work for a company that is letting me take my time <br>
with this, test the various options and come up with the proper<br>
solution. I am assuming (I know: dumb to assume) at this point that<br>
VoIP over a T-1 to a provider that can then route it to hard phones for<br>
me would be the way to go. Similarly, I would point my 800 number to
a <br>
DiD hosted by a VoIP provider that would then route the call back to<br>
me. If that is an incorrect assumption, please let me know.<br>
<br>
Regards,<br>
<st1:City w:st="on"><st1:place w:st="on">Warren</st1:place></st1:City><o:p></o:p></span></font></p>
</div>
</blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre
style='text-align:center'><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>
<hr size=4 width="90%" align=center>
</span></font></pre><pre><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>--Bandwidth and Colocation provided by Easynews.com --<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Asterisk-Users mailing list<o:p></o:p></span></font></pre><pre><font
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size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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