How many concurrent calls trixbox supports?

get a powerful server, and LET US KNOW...

i assume youre LAN can handle 1300 phones concurrently, so besides for the bandwidth issue there... it can be scaled up to the power of your machine, the amount of transcoding (hopefully none), conf rooms, etc etc

you might want to do 4-5 servers, with 200 each, and DUNDI them, or use TB pro ($$$$$$) to link them.

People have discussed unifying multiple servers all over the forums, take a look.

I'm no expert but it really depends on your server.

The folks around here don't suggest using trixbox as a service provider platform.

A 2XQuad Core Xeon with 4GB RAM should be able to handle near 500 concurrent calls i think however it all depends on other factors such as codecs (is transcoding involved?) etc..

Asterisk isn't really that scalable into the thousands w.r.t. concurrent calls however since this is the world of linux...your servers are now your oysters!!

Please remember I am no expert - someone else here will be better to answer :)

Cheers

I have seen lab tests on a website (through voip-info I think) where it showed a Xeon and 2Gb of RAM running Asterisk.
There was something like 1200 Registrations and with no transcoding and just normal calls it was like 500 simultaneous but as soon as transcoding was used it dropped to 200 I think.

Will try and find the website and post.

Cheers
Garry

Even deploying a 650 user system, as I am in the planning stages for, is a very large undertaking. There are so many different hardware options, software configurations, and tons of other variables that come into play in determining what your system will be able to handle. I am fortunate that my employer also has 2 full time software engineers that can write tools for things like bulk user provisioning and bulk phone configuration, integrating the system with currently existing platforms, and the list goes on.

Don't skimp on anything if you can. 4 quad-core Xeon's should be able to handle quite a bit, but it doesn't hurt to add "helper" hardware such as a digium transcoder card (if you'll be doing any transcoding) or echo cancellation modules on your T1 cards.

skykingoh, i think your comment is right on the money. i have built and have deployed a 1200 concurrent call "system" [actually does 1200 concurrent calls, not just "has the capability to"] and I can state the following with confidence (a) even if such a machine existed that could do it, it would be a ridiculous thing to do from a reliability/risk point of view (b) it runs on a cluster of 12 machines [8 active/4 passive] brute machines [dell 2950 with lots of processors and RAM etc] that have been bare metalled for performance and (c) since this runs substantial queues and outbound dialers, it takes a LOT of planning for this kind of deployment.

IMHO, this kind of scale is not something for a trixbox implementation or a person without substantial experience in IT, networking as well as asterisk. it could be done with trixbox but that would be like me entering a NASCAR event with the family car, pretty silly.

just my observations...

I wouldn't plan on having more than 200 concurrent calls per single system. Your architecture should take this into account and use the appropriate trixbox / media gateway best practices. I think you can find Visio diagrams on how this is properly configured on http://help.trixbox.com.

look at redphone devices for redundancy

Thanks for your links...it was really useful