Capacity Planning

[broadviewtech]

I'd like to know about VoIP capacity of Elastix. Not using it for email, security, etc..
Say I have two different machines, how many users / simultaneous calls can they support?

Dell E310
Intel P4 3.0G 64bit CPU, 1GB RAM, 120GB SATA HDD, 10/100 LAN

Dell Precision 690
Intel Xeon 5050 3.0G Dual Core, 2GB RAM, 500GB SATA3 HDD, 10/100/1000 LAN

I can't seem to find much documentation for capacity planning on the site or in the forums here. Thank you for any help!

 

[re12y3]

I elastix installed on a machine with dual 3.0 core duo, 2GB RAM, 256GB SATA HDD, 10/100 LAN with 2 cards openvox a2400p that are consuming the most resources of the team, with 3 SIP trunks, but only used a single elastix with telephony features and had no problems, only a slight delay to enter web, working 30 to 60 people at once.

The only thing is that as recording all flames if I had to free up space on your hard disk periodically.

If you put E1 cards consume less computer resources and also the SIP trunk can have more people connected.

Now I was also in a place where we put a robust server with 3 cards of 4 E1 connections each with 200 people and setting it and elastix network card 100/1000 and was the star type network where the principal was swicht 1000 in each port and had no failures.

What I could tell you how big the frog to the type of stone.

Sorry, but my English is not good

 

[broadviewtech]

re12y3 thank you for your answer, I don't know that I would be involving any regular analog or ISDN type lines, I am assuming only SIP trunks. Trying to find more examples with that type of setup.

 

[re12y3]

Re: Re:Capacity Planning

If you consider pure SIP trunks, I recommend the following:

-That you check the capacity of your internet speed both upstream and downstream
-What codecs you use for connecting with your supplier
-The ability of your swhits and router.

 

[broadviewtech]

Yes, definite low latency internet is going to be something I stress to any client. Preferably a cable internet connection. DSL only if cable is unavailable.

I believe speakeasy.net has a new speed test that shows broadband quality...

http://www.megapath.com/speedtestplus/

As far as the codecs... I think ULAW (?) is the one my current trunk provider supports now? I would have to look at their site again.

As far as switch and router, I would make sure they have at least a 100mb capable switch with VLAN capability, and the router is commercial grade such as a Cisco business model.

Am I going in the right direction?

 

[Redfone1]

Straight SIP to SIP calls, no codec crunching, IVR, call recording or anything resource intensive like that you should be able to scale to several hundred concurrent calls no problem. If you are looking to scale upwards towards a 1000 or more calls you may want to consider front-ending your Elastix server with a SIP Proxy server (Kamailio, OpenSIPS, etc.) These are software apps similar to Asterisk but specifically built to handle SIP signalling on a large scale and offload some of that processing from Elastix.

Hope this helps.

 

[re12y3]

Re: Re:Capacity Planning

As I mention my partner elastix its strongest is IP telephony is therefore advisable to use well.

On whether all SIP trunk providers use g729 codec as it is the most compact and good quality, but for licensing elastix is not installed, you must purchase a license for $ 10 and install it, I recommend you not to opensource that has not had updates and suffers from short calls among other factors.

Now this league you can help get the formula for the speed you require for the number of connections.

http://www.voip-info.org/wiki/view/Band ... onsumption

B)

 

[broadviewtech]

Re: Re:Capacity Planning

Thank you there are some really good links in there. Good info. +1