Controlling IAX bandwidth
In the iax.conf config file the following parameters can be used to adjust the used bandwidth.
bandwidth=low disallow=all allow=gsm
When the bandwidth is set to low, Asterisk will use the codec with the lowest bandwidth available. For more info on codecs and their bandwidth usage, see Audio_Codecs
Controlling SIP bandwidth
In the sip.conf:
This will tell the sip-device what bandwidth is available (in kbps). This value defaults to 256 kbit/s.
Possibilities of X-lite
- "Zero Touch bandwidth detection"
- QoS maybe not implemented in the free version (is an advertised feature for the non-free version)
- Both X-lite and Eyebeam support Auto Bandwidth - Automatically measures available bandwidth and adjusts codec selection accordingly. Perhaps is Asterisk or IAX reporting the available bandwidth.