[Serusers] OpenSER infrastructure dimensioning

Hi, we are considering OpenSER for offering free SIP-based voice, video and IM services and I am trying to get an idea of the project cost. The components we need are: - SIP stateful proxy + registrar server - location & presence server - simple2jabber - media proxy for symmetrical NAT traversal - (perhaps I forgot something here?) We'll rely on external gateways for PSTN access so that is not to be taken in consideration here. Now can somebody give me an indication on the server park dimensioning? In other words, how many SIP servers, media proxies, ... would I need per 10000 subscribers? The server platform could be e.g.: - operating system: Linux - hardware: HP ProLiant DL380 Generation 3 (single CPU with 1GB RAM) but of course any equivalent would do as well. I also have a second question: which organisations in Europe offer commercial support for OpenSER? Hope this forum is the right place for this kind of questions... I really appreciate your input, Michel ************************************************************* Dit e-mail bericht inclusief eventuele ingesloten bestanden kan informatie bevatten die vertrouwelijk is en/of beschermd door intellectuele eigendomsrechten. Dit bericht is uitsluitend bestemd voor de geadresseerde(n). Elk gebruik van de informatie vervat in dit bericht (waaronder de volledige of gedeeltelijke reproductie of verspreiding onder elke vorm) door andere personen dan de geadresseerde(n) is verboden. Indien u dit bericht per vergissing heeft ontvangen, gelieve de afzender hiervan te verwittigen en dit bericht te verwijderen. This e-mail and any attachment thereto may contain information which is confidential and/or protected by intellectual property rights and are intended for the sole use of the addressees. Any use of the information contained herein (including but not limited to total or partial reproduction or distribution in any form) by other persons than the addressees is prohibited. If you have received this e-mail in error, please notify the sender and delete its contents. *************************************************************