Difference between revisions of "Voice only analysis"

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[[image:schematic_of_PC-config.png|Schematic overview of all PC's running which software.]]
 
[[image:schematic_of_PC-config.png|Schematic overview of all PC's running which software.]]
  
A voice-call has been established between SIP phone 201 and SIP phone 301, which both use  the G711u codec.
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Legenda:
* Traffic to and from Ext. 201 is Green
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* '''Black''': Traffic between the Asterisk-boxes in one direction.
* Traffic to and from Ext. 301 is Red
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* '''Blue''': Traffic between the Asterisk-boxes in the other direction.
* Traffic between Asterisk-boxes is Blue in one direction and black in the other
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* '''Red''': Traffic to and from SIP phone 301
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* '''Green''': Traffic to and from SIP phone 201.
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* '''Pink''':
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Used filters in I/O-graph:
 
Used filters in I/O-graph:

Revision as of 19:06, 20 February 2007

Experimental Setup

Because it is impossible to measure data traffic between two VM ware's on the same machine, the following setup has been made.

Schematic overview of all PC's running which software.

Legenda:

  • Black: Traffic between the Asterisk-boxes in one direction.
  • Blue: Traffic between the Asterisk-boxes in the other direction.
  • Red: Traffic to and from SIP phone 301
  • Green: Traffic to and from SIP phone 201.
  • Pink:


Used filters in I/O-graph:

Filter-Black: ip.src == 192.168.1.101 && ip.dst == 192.168.1.106
Filter-Red  : ip.src == 192.168.1.3   && ip.dst == 192.168.1.106
Filter-Green: ip.src == 192.168.1.189 && ip.dst == 192.168.1.101
Filter-Blue : ip.src == 192.168.1.106 && ip.dst == 192.168.1.101
Filter-Pink : ip.src == 192.168.1.100 && ip.dst == 192.168.1.101

Wireshark-graph G711 G711 traffic Bps oneway-traffic.png

From the graph shown above there can be concluded that the IAX2 traffic (black and blue line) uses less bandwidth than the SIP-traffic (red and green line). We also filtered for traffic between all three SIP-telephones and no traffic was detected.