[cisco-voip] DSP Calculation

[Nick Matthews]

Some rules you can use for quick and dirty:

Every PRI add 24, every FXO/FXS add 1.

If you're using G729, double that number.

If you're using conferencing, add 16 per conferencing session.

If you're using transcoding, you have to know what percentage of your calls
are going to be transcoded.  1 for G711, 2 for G729 per each session.

This will be a little bit above what you need since the actual ratio for
G729 is closer to 1.7-1.8.


For PVDM3, conferencing is eased up and you can add 1 channel per member of
the conference.  Ex: 2 8 party conferences is 16.

To get something more concrete, use the handy-dandy DSP calculator:
http://www.cisco.com/web/applicat/dsprecal/dsp_calc.html

-nick

On Tue, Sep 14, 2010 at 10:53 PM, Bill <bill at hitechconnection.net> wrote:

>  If you need to bring up PSTN interfaces such as PRI, FXO or FXS. If you
> need to do hardware based conferencing or if you need to transcode one codec
> to the other.
>
>
>  ------------------------------
>
> *From:* cisco-voip-bounces at puck.nether.net [mailto:
> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Briann McDonald
> *Sent:* Tuesday, September 14, 2010 2:42 PM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] DSP Calculation
>
>
>
> All,
>
>
>
> What is a general rule to apply when determing DSP module needs.
>
>
>
> Thanks,
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
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