Difference between revisions of "Voice only analysis"
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* 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). This is due to the IAX trunking which reduced the overhead. | * 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). This is due to the IAX trunking which reduced the overhead. | ||
* We also filtered for traffic between all three SIP-telephones and ''no direct traffic was detected between them.'' | * We also filtered for traffic between all three SIP-telephones and ''no direct traffic was detected between them.'' | ||
| + | * The audio traffic is measured to be approximately 10500*8/1000=84kbps, which corresponds very well to the expected NEB value of 87.2 kbps. | ||
Revision as of 14:08, 23 February 2007
Experimental Setup
Because it is impossible to measure data traffic between two VM ware's on the same machine, the following setup is used.
Results
With WireShark data has been collected and the following filters are used in the 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
Legenda:
- Blue: Traffic between the Asterisk-boxes in the other direction.
- Black: Traffic between the Asterisk-boxes in one direction.
- Red: Traffic to and from SIP phone 301.
- Pink: Traffic to and from SIP phone 202.
- Green: Traffic to and from SIP phone 201.
Conclusions
- 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). This is due to the IAX trunking which reduced the overhead.
- We also filtered for traffic between all three SIP-telephones and no direct traffic was detected between them.
- The audio traffic is measured to be approximately 10500*8/1000=84kbps, which corresponds very well to the expected NEB value of 87.2 kbps.
