Difference between revisions of "Voice-only with different codecs"
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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.]] | ||
Legenda: | Legenda: | ||
| − | * '''Blue''': Traffic between the Asterisk-boxes | + | * '''Blue''': Traffic between the Asterisk-boxes. |
| − | |||
* '''Red''': Traffic to and from SIP phone 301. | * '''Red''': Traffic to and from SIP phone 301. | ||
* '''Pink''': Traffic to and from SIP phone 202. | * '''Pink''': Traffic to and from SIP phone 202. | ||
Revision as of 18:14, 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.
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.
Voice-call between 201 (GSM-codec) and 301 (G711u codec)
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 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 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
