Number of concurrent calls can not increse on Linux
If Brekeke PBX is running on Linux system, especially in a large-scale system, you may face the issue that the number of concurrent calls can not increase, even when the system has enough hardware resources.
It may be caused by some limitations of Linux OS.
In middle-large scale system which has more than 250 concurrent calls in normal operation,
You need to check and increase the limitations according to the following instructions.