Delay in VOIP (cannot capture RTCP)

[capricorn 80 <cool_capricorn80 () hotmail com>]

 Hi!

 

  I am trying to calcuate the delay in VOIP using wireshark. My both end systems are synchronized with ntp.

 

  If i done this test with two different calls on different location. Some times i get RTCP capture in a proper way in 
one of the call and not in other.

 

  Similarly on one end i can see the RTCP packets in a proper order and can see sender and receiver reports but some 
times its just sender report.

 

  how can i perform the test in a proper way to get the accurate results?

 

Regards,

 

 
                                          
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