> -----Original Message-----
> From: [email protected] [mailto:cisco-nsp-
> [email protected]] On Behalf Of Bryan Campbell
> Sent: Monday, June 08, 2009 8:46 AM
> To: Kasper Adel
> Cc: [email protected]
> Subject: Re: [c-nsp] Opensource tool to measure Jitter for VoIP
> 
> 
> You cannot measure VOIP (sip) jitter using ICMP tools.  You will only
> isolate false positives when the ICMP is not doing well.
> 
> Route or mirror the customers traffic trough a monitoring station.  Run
> tcpdump or Wireshark to get a pcap file that contains traffic of
> interest.  Wash the pcap file through the Wireshark VOIP analysis tool
> to find your jitter.  It is a standard tool in Wireshark.
> 
> If you can't find jitter in this manner, it cannot be found.  If it
> cannot be found, it doesn't exist.
> 
> [email protected]

What are the there legal ramifications to this?  While I like to think that 
"it's my network, I'll do what I want to measure its performance", I *think* 
that sniffing voice traffic without consent is considered wiretapping.  IANAL, 
but it would behoove you to get a consent form from your customer prior to 
taking this route, just in case.

-evt
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