Call flood using up all sim calls and causing dropped conference?

[HERETIC]

Today we had a conference call drop numerous clients and at the same exact time we had a call flood to one of the direct routes.

How can we prevent this, and why is it possible?

 

[JohnS_3CX]

Hello @HERETIC

Firstly it would be a good idea to start here https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

Then, define what you mean by call flood and how this is related to the conference. The above screenshot does not reveal enough information unfortunately.

Generally speaking there are hard limitations based on your trunk provider's max. channels, your PBX license, and possibly other factors like bandwidth. If you reach them you will not be able to take any more calls or even have degraded audio and timeouts