[asterisk-users] End to End delay calculation

[capricorn 80]

 Hi!
 I am looking to calculate the end-to-end delay between two soft phone/hard phone. I have asterisk server and configured ntp server on the same machine and synchronized it with ntp pool.  I have seen that Wireshark can be used to check the jitter. But I am not sure how can i calculate the end to end. 
May be this is not related to the mailing list topic but please help me if anyone has some information.
Regards,
 		 	   		  
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