TelephonyIntroduction
Wireshark provides a wide range of telephony related network statistics
which can be accessed via the Telephony menu.
These statistics range from specific signaling protocols, to analysis of
signaling and media flows. If encoded in a compatible encoding the media
flow can even be played.
RTP Analysis
The RTP analysis function takes the selected RTP stream (and the reverse
stream, if possible) and generates a list of statistics on it.
Starting with basic data as packet number and sequence number, further
statistics are created based on arrival time, delay, jitter, packet size,
etc.
Besides the per packet statistics, the lower pane shows the overall
statistics, with minimums and maximums for delta, jitter and clock skew.
Also an indication of lost packets is included.
The RTP Stream Analysis window further provides the option to save the RTP
payload (as raw data or, if in a PCM encoding, in an Audio file). Other
options a to export and plot various statistics on the RTP streams.
VoIP Calls
The VoIP Calls window shows a list of all detected VoIP calls in the
captured traffic. It finds calls by their signaling.
More details are described at the
page.
LTE MAC Traffic Statistics
Statistics of the captured LTE MAC traffic. This window will summarize the
LTE MAC traffic found in the capture.
The top pane shows statistics for common channels.
Each row in the middle pane shows statistical highlights for exactly one UE/C-RNTI.
In the lower pane, you can see the for the currently selected UE/C-RNTI
the traffic broken down by individual channel.
LTE RLC Traffic Statistics
Statistics of the captured LTE RLC traffic. This window will summarize the
LTE RLC traffic found in the capture.
At the top, the check-box allows this window to include RLC PDUs found
withing MAC PDUs or not. This will affect both the PDUs counted as well
as the display filters generated (see below).
The upper list shows summaries of each active UE.
Each row in the lower list shows statistical highlights for individual
channels within the selected UE.
The lower part of the windows allows display filters to be generated and
set for the selected channel. Note that in the case of Acknowledged
Mode channels, if a single direction is chosen, the generated filter will
show data in that direction and control PDUs in the opposite direction.
The protocol specific statistics windows
The protocol specific statistics windows display detailed information
of specific protocols and might be described in a later
version of this document.
Some of these statistics are described at the
pages.