[asterisk-users] how many UDP ports is required for 1 call

[Phil Frost]

On 02/22/2012 07:26 AM, virendra bhati wrote:
> Does anyone know the correct information of my question. All are
> move round and round .

Why don't you make a call, and watch the network traffic with tcpdump, 
wireshark or similar? Wireshark in particular has an analysis module 
that will show you a summary of each network conversation by source and 
destination IP and port and protocol, as well as a handful of analyzers 
developed specifically for IP telephony. You can then count for yourself 
how many ports are used for your particular definition and 
implementation of "call", as well as gain a deeper understanding of what 
happens on the wire.