On 05/06/2012 01:39 PM, Paul Belanger wrote:
800 SIP phones on one server? I wouldn't want to do it. Add a SIP proxy to your design and have it handle all your SIP. Then you can load balance across multiple asterisk boxes. You'll be thankful you did this at the start, as it will allow you to increase resources more easily.
As has already been pointed out by others in this thread, 800 phones on a single Asterisk server (using Asterisk 1.8.x or later and a decent spec server) is really no problem. If all of those phones are going to be subscribing to hints for a dozen or more of the other phones, then yes, that could be an issue, as the amount of NOTIFY traffic would be quite high... but for registration and normal calling, even if all these phones were in use at once, I would not expect any issues at all due to performance.
The other comments about being able to take down a server for maintenance and not lose calling ability are certainly worth taking into consideration as well, but if your planned deployment would allow for reasonable scheduled maintenance windows, even that wouldn't justify the complexity of adding in one SIP proxy (or a pair of them) to the equation.
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