ok but what I cannot understand is this, if all endpoints have RTP ports from 10000 to 10200 and I have 60 extensions that are all talking simultaneously, maybe 200 ports are not enough? maybe I will have no audio in some intense overloads situations? is it correct to think that maybe is better to give a specific port range per endpoint like ext1 RTP from 10000 to 10100 ext2 from 10101 to 10200 etc… just want to understand the correct setup.
many thanks
Asterisk tells your phone “here’s your RTP port”. It is associated with the IP of the server and should be managed by Asterisk, so there “shouldn’t be” any collisions.
Your phone tells Asterisk “OK, here’s the RTP port I want you to use (in the 10000-10200 range)”. Since the phone IP and port are guaranteed to be unique, it “shouldn’t” collide.
Do some SIP traces and see if that interaction is what you are seeing. It should be fine.