Difference between revisions of "Voice-only with different codecs"
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== Experimental Setup == | == Experimental Setup == | ||
| − | In order to gain inside in the bandwitdh usage when SIP-phones use different codecs, the following experimental setup is used. | + | 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. |
[[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.]] | ||
Revision as of 18:13, 20 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.
Voice-call between 201 (GSM-codec) and 301 (G711u codec)
- Traffic to and from Ext. 201 is Green
- Traffic to and from Ext. 301 is Red
- Traffic between Asterisk-boxes is Blue
Used filters 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 doe 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 meassured 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
