[asterisk-biz] Unlimited DID

[Trixter aka Bret McDanel]

On Thu, 2008-08-14 at 11:05 -0700, Jai Rangi wrote:
> Trixter,
> Thank you for your comments, 
> We are not dealing with PSTN on our side, we are true VoIP. 

Then what are the DIDs?  If they are PSTN callable then there is a pstn
link somewhere, and that link will have a finite amount of channels it
can support and generally it will require the telco to upgrade, and they
may not want to for whatever reason - or may not want to in a timely
fashion.  This can cause them to limit you in aggregate, which
ultimately that limit will be passed to your customers, although no
single customer may notice if its sufficiently high.


> Re: Bandwidth, we have upto 100mb. Yes we WILL NOT be doing any media
> on our network which is real bandwidth killer.  Re: cpu and and other
> limits we have built our system on horizontal scalable architecture,
> fully redundant and load balanced system, that includes firewall, SIP
> router, Asterisk servers, Database servers etc. 
> 

Ok, 100Mbps should be enough for just SIP, but then again under my
example the provider would have to have enough *extra* capacity for the
1Gbps of media (assuming "worst case" G.711) that would be generated.
Keep in mind that you are adding to their current load by doing this,
and if they dont expand, or dont expand quickly enough, odds are they
are going to have to limit the channels for that reason.  

Additionally you are taking 1/3 of a media gateway P (you can only do
about 32k media streams with RTP per IP since it requires "every other"
port, with RTCP one off, port numbers are a 16 bit integer blah blah
blah).  I do not know if they have that much spare RTP capacity either,
so again limits can come from that.  


> During our crash test, my server was sleeping until 2500 channels. So
> I am not really worried upto 5000 channels and from there I can easily
> expand my capacity. Our target is to do the expansion as soon as we
> reach the 40-50% utilization of the resources. For companies who has
> more that 200 channels on each DID I think it will be worth for them
> to deal directly with Lavel3, XO, Quest or Verizon directly. 
> 

Except that they can get the service from you for $8-11 and it would not
be so cheap from those companies directly.  As a result if you really do
offer no limits, no redefining words in your user agreements, and all
that, this would provide them with a much cheaper alternative.  Sure it
gets you customers, but it can be problematic in the end.


> Yes, I agree that every unlimited has a limit in terms of capacity and
> resources and we are not exception. But I am positive that we can be
> good resource for small to mid size businesses. 

That may be, just be warned that the limits that can be placed may not
come from you, but rather your carriers, or somewhere else in between
you and the pstn.  Those are limits you really cant control easily, but
they still affect your ability to market as unlimited.

-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
Belfast +44 28 9099 6461        US +1 516 687 5200
http://www.trxtel.com the phone company that pays you!