[Asterisk-Users] asterisk with big number of extentions.

[Dmitry Mishchenko]

On Thursday 29 January 2004 14:27, Rich Adamson wrote:
> > We are thinking of making network of about 25000 extension numbers.
> > These extension will be SIP phones. Asterisk will be connected to some
> > VoIP gateways through H323 which will allow to
> > terminate calls.
> >
> > Can Asterisk handle such kind of load?
>
> No problem, as long as none of them make any calls. What you really wanted
> to ask is, how many simultanous calls can a single * box handle, and that
> is a function of exactly "how" you configure/engineer it:
>   1) sip phones that have canreinvite=yes use * for call setup only
>   2) sip phones that have canreinvite=no force the rtp traffic through *
>      consuming a greater amount of processing resources
>   3) sip phones that are configured with different encoding (codec) schemes
>      are forced through some translations somewhere. Is that * in your
> case? If so, see #2.
>   4) some sip phones (or adapters) don't handle sip invites very well, and
>      must pass all rtp traffic through *. If you use those, see #2.
>   5) some sip phones lurking behind NAT boxes require all rtp traffic to
>      pass through *. See #2.
>

Rick, thanks for reply. It looks like we are comming to #2 with our 
configuration. At least half of the traffic will pass through our * box.
see below...

> > Can it be done on one server?
>
> Probably not given the answer above.
>
> > What kind of server do we need for making it work?
>
> High reliability, fast processor, disk speed less important, high
> throughput ethernet, and a good consultant or two to help. ;) See the wiki
> pages.
>

I assume you mean voip-info.org.  I've check hardware recomendations there. 
But listed examples looks far away from the setup we are thinking about. The 
biggest is about hundreds of phones.

It'll be interesting to get some real numbers how much simultaneous 
connections (channels) certain server can handle.

Also I'm interesting in the ways how asterisk setup can be scaled for 
extending number of channels.

> To properly engineer "any" pbx, you will have to start with some reasonable
> call/traffic statistics, and engineer around those numbers. Asterisk is no
> different.
>

Thanks for advise. Unfortunately we don't have this kind of data for this 
project. All we have is estimations.

Dmitry

> Rich
>
>
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