Difference between revisions of "Voice-only with different codecs"
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This does not tell us which Asterisk box makes the conversion between the GSM codec and the G711u codec. | This does not tell us which Asterisk box makes the conversion between the GSM codec and the G711u codec. | ||
| − | Therefore we made another graph with the traffic | + | Therefore we made another graph with the traffic measured only in one direction. |
Used filters in I/O-graph: | Used filters in I/O-graph: | ||
Revision as of 13:10, 23 February 2007
Experimental Setup
In order to gain inside in the bandwitdh usage when SIP-phones use different codecs, the following experimental setup is used. A voice-call has been established between SIP-phone 201, which uses the GSM-codec and SIP-phone 301, which uses the G711u-codec.
Legenda:
- Blue: Traffic between the Asterisk-boxes.
- Red: Traffic to and from SIP phone 301.
- Pink: Traffic to and from SIP phone 202.
- Green: Traffic to and from SIP phone 201.
Results
With WireShark data has been collected and the following filters are used in the in I/O-graph:
Filter-Black: proto=sip Filter-Red : ip.addr == 192.168.1.3 && ip.addr == 192.168.1.106 Filter-Green: ip.addr == 192.168.1.189 && ip.addr == 192.168.1.101 Filter-Blue : ip.addr == 192.168.1.106 && ip.addr == 192.168.1.101 Filter-Pink : ip.addr == 192.168.1.100 && ip.addr == 192.168.1.101
This does not tell us which Asterisk box makes the conversion between the GSM codec and the G711u codec. Therefore we made another graph with the traffic measured only in one direction.
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
Conclusions
- Tsah
