[asterisk-biz] Unlimited DID

Thu Aug 14 14:36:46 CDT 2008

Bret has pointed out some of the bigger ones...

If you're going to do this many channels, you should be talking to multiple sip 
peers (different IPs) with multiple sip routers, in multiple locations, with at 
least a gig connection at each one.  Plan on having lots of problems, and have 
the capacity to allow those problems to occur without hurting everything else.

Ex:  if all the sudden you're forced to handle the media for a thousand active 
channels (this happens), the bandwidth required for that could max out your 
70mbit connection.  Yes, 70mbit, only 70-80mbit is possible over a fast-ethernet 
connection, depending on what layer you're counting at anyway...

32kbps/channel x 1000 != 32mbps when it hits the wire

Jai Rangi wrote:
> Issues like? Can you please give an example?  Definitely we would like to
> work around all those issues.
> 
> -Jai
> 
> 
> On Thu, Aug 14, 2008 at 11:48 AM, Joe Antkowiak <jantkowiak at netigent.net>wrote:
> 
>> just because you don't deal with the pstn directly, doesn't mean you won't
>> have
>> issues with the pstn.
>>
>> Jai Rangi wrote:
>>> Trixter,
>>> Thank you for your comments,
>>> We are not dealing with PSTN on our side, we are true VoIP.
>>> 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.
>>>
>>> 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.
>>>
>>> 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.
>>>
>>> -Jai
>>>
>>>
>>> On Thu, Aug 14, 2008 at 10:11 AM, Trixter aka Bret McDanel <
>>> trixter at 0xdecafbad.com> wrote:
>>>
>>>> On Thu, 2008-08-14 at 09:47 -0700, Jai Rangi wrote:
>>>>> All,
>>>>>
>>>>> I want to take community opinion on this.
>>>>> Would there be enough interest if I can offer Unlimited channels, non
>>>>> metered DID at $8-$11 (Depending on the volume commitment) per month.
>>>>> Target is to sell atleast 10000 DIDs in one to 2 months of time
>>>>> frame.
>>>>>
>>>>> Any comment would be appreciated.
>>>>>
>>>>> Thank you,
>>>>> -Jai
>>>>>
>>>> I think people would like it, but there would be some apprehension about
>>>> it.  The pstn carrier has a finite amount of channels available for that
>>>> exchange.  You only have so much bandwidth, even if you never touched
>>>> the media the provider only has so much bandwidth.  Then there is the
>>>> CDR processing, route processing, etc - cpu resources are finite,
>>>> although you can add more just like you can add more pstn and inet
>>>> capacity.
>>>>
>>>> So would $8-11 cover all of those costs and allow you to really do
>>>> unlimited service?  What if someone ran some application that generated
>>>> hundreds of thousands of calls?  Or even a few that just did hundreds?
>>>>
>>>> Granted if you did 10k DIDs at $8 that is $80k/mo.  And lets say that
>>>> 10% did above average traffic of say 150 average channels, that is still
>>>> 15,000 channels that would have to be maintained give or take (I really
>>>> am just pulling numbers out of thin air).  You would certainly be able
>>>> to afford the cpu and bandwidth costs, which will require more than
>>>> 1Gbps (I always discount bandwidth both because of atm padding and
>>>> because you never want it 100%), but the carrier may not be able to
>>>> handle that channel load, and some of the call centers I have seen
>>>> traffic on, 150 channels is low, some do thousands at a time, which
>>>> would skew that slightly (even though its an average over the top 10%
>>>> users).
>>>>
>>>> In general from what I have seen, most "unlimited" plans have some type
>>>> of limit burried somewhere in their user agreement/tos, this is because
>>>> capacity is finite and they do not want to go overboard with capacity
>>>> and lose money.  On a slight tangent, I just wish that carriers who
>>>> didnt offer real unlimited would stop advertising it as such, * or not
>>>> to indicate some obscure definition of "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!
>>>>
>>>>
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>>>
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> 
> 
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