Wireshark-users: Re: [Wireshark-users] Wireshark-users Digest, Vol 56, Issue 26 about the VOIP ba

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From: "COHEN, HARVEY S (ATTSI)" <hc2182@xxxxxxx>
Date: Mon, 31 Jan 2011 10:03:03 -0500
Wireshark is correct. 64 Kbps is the bandwidth of the G.711 payloads
inside the RTP packets.
81.6 Kbps is the bandwidth of the RTP packets themselves.

Harvey S. Cohen
AT&T Labs, Middletown, NJ
Mobile +1-908-768-5833
Office +1-732-420-4099

-----Original Message-----


Message: 12
Date: Sun, 30 Jan 2011 19:12:55 +0000
From: nangergong <nangergong@xxxxxxxxx>
To: wireshark-users@xxxxxxxxxxxxx
Subject: [Wireshark-users] about the VOIP bandwidth
Message-ID:
	<AANLkTikoLJkWQN4KPPrEKs-NUVr_j=HWNqZhXWej7EZz@xxxxxxxxxxxxxx>
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Hi, all:

  I'm using wireshark to capture VOIP streams, the Codec used in the
VOIP
session is G711, which uses bandwidth of 64kbps.

  When I follow the following steps to analyse the VOIP streams:

  Telephony->RTP->show all streams->Analyze,

  I found that the IP BW (bandwidth) column shows that the bandwidth is
about 81.6 kbps.   I also used a traffic monitoring program to monitor
the
traffic, which shows the bandwidth used is about 64kbps (conformant to
G711
bit rate ). So, I wonder whether wireshark is accurate in measuring the
bandwidth? or even other metrics such as jitter,etc..

  Thank you!