we are facing asterisk high call volume issue, when calls are increase more then 500 simultaneously ,asterisk start skiping some SIP responses and requests and start re-transmission. Please check and help to resolve it and also help to share asterisk max call handling count.
There is no fixed maximum call handling count. It all depends on the system itself, what you are doing, and how you have configured things. You’d need to examine and determine what is going on in your deployment to determine the bottleneck and why it is doing what it is doing.