[Asterisk-Users] Pricing for DS3000P

[Matt Klein]

4 to 1 ratio... is the industry standard for voice. 10 to 1 is dialup. 
Some raise it.

I'm, personally, waiting a year or so to hear about the complaints from 
the lists before I bother.

-m

On Sat, 4 Jun 2005, trixter http://www.0xdecafbad.com wrote:

> On Sat, 2005-06-04 at 09:50 +0100, Tom Fanning wrote:
>>> Agreed, those are the figures we were able to get
>>> from Digium... I'm still waiting for a confirmation,
>>> but I'm being safe with a $4k estimate..
>> <snip>
>>
>> What's so special about Digium cards that makes them this expensive? $4000
>> for a PCB is extortion IMO!
>
> A ds3 does 672 channels, normally on 2 strands of coax (and there are
> bnc connectors on the pic on digiums site).  The port cost is then about
> $6/port.  That is really cheap in all honesty.  672 ports can in theory
> support about 10,000 customers (given the rather dated 7% of people use
> the phone at any given time - that figure I think was accurate in the
> early/mid 90s and I am sure its higher now but I havent checked any
> reliable sources for an update.  I did read a more recent study that
> suggested that the average person usese the phone 6 minutes a day, I use
> it for hours a day my parents maybe 16 mintes 3 times a week, so who
> knows).
>
> Even if its 5000 customers (ie calling is 2x higher, people stay on 2x
> longer, etc) that is still much more cost effective than the 28
> individual DS1s that it would take to fill a DS3.  There is a EU
> standard that afaik is framed basically the same but instead of 4 DS2s
> which are 7 DS1s (logical framing a DS2 always exists on a DS3
> physically afaik) its built upon E1s, so there are slightly fewer E1s
> since they are 30 DS0s instead of 24.
>
> Not to mention that a DS3 circuit normally costs about what 12 DS1s cost
> so its like getting 16 free.  This makes everything cheaper in the long
> run, thus companies are able to offer better rates for PSTN
> interconnection which can be passed to the consumer.
>
>
> I am curious on cpu load, if all dsp functions are done via software
> instead of offloaded onto a specialized processor (DSP board) that has
> to have some effect on call processing, meaning a more beefy machine to
> handle the load, and the real possiblity of not having a single board do
> everything (application, media gateway, VoIP, etc).  While it makes
> sense on that type of a system (high capacity) to spread it out for load
> balancing and redundancy and all that stuff that gives you a warm fuzzy
> feeling, it may now be more of a requirement.
>
>
> -- 
> Trixter http://www.0xdecafbad.com     Bret McDanel
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