freeswitch can handle up to 3,000-5,000 simultaneous calls on a performant standard hardware，
When Freeswitch is not used as media server, the capacity of the system (number of simultaneous calls) can be enhanced by a factor 10-20. Thus systems with up to 100.000 active calls can be realized on a single telephony server with a million of users. By using the built-in cluster functionality, these numbers can be even enhanced with several parallel Freeswitch servers.
配置：
- CentOS 5.3 64bit
- FreeSWITCH Version 1.0.trunk (14125)
- sipp 3.0
Result ：
test |
variant |
call duration |
calls per second |
established calls in peak |
system ram |
%CPU |
remarks |
maxout cps |
dur 0 |
0s |
700 |
700 |
0.8GB |
61% |
|
maxout cps |
dur 5s |
5s |
450 |
2250 |
2.2GB |
68% |
|
maxout cps |
dur 90s |
90s |
50 |
4500 |
4.9GB |
72% |
|