Grant Supp
2005-Nov-10 20:44 UTC
[Asterisk-Users] iaxy and comfort noise generation / sound quality
Am I correct in assuming the iaxy (S101I) does not support comfort noise generation (CNG)? I can tell a difference between a call placed using a Grandstream 486 ATA and the iaxy. With the iaxy, when the other party is silent, the sound level abruptly cuts off to zero. This is fairly annoying and wouldn't be acceptable at a customers' presence. With the 486, random background noise is still heard, more like a traditional phone. Does anyone have any suggestions or can recommend an ATA with high sound quality? So far I have tested the Grandstream 286/486 (unreliable) and Digium iaxy (S101I). I have not been able to find a reliable ATA that has high sound quality. I'm still trying to track down the issue, but it seems I'm having more jitter problems with the iaxy than the SIP-based Grandstream ATAs. Incoming audio on the iaxy often gets choppy. Has anyone else experienced this or have any suggestions? I use the ulaw codec on all devices and I don't believe the issue is available bandwidth (problem seems to only occur using iaxy.) I have the following jitterbuffer settings in iax.conf (Asterisk 1.0.7): jitterbuffer=yes dropcount=1 Thank you for your time, -- Grant Supp I N T H R I V E gsupp@inthrive.com http://www.inthrive.com High Availability Web Hosting
Eric "ManxPower" Wieling
2005-Nov-10 21:00 UTC
[Asterisk-Users] iaxy and comfort noise generation / sound quality
Asterisk does not support CNG. It doesn't accept it and it doesn't generate it. The same for the IAXy. Try SIPura if you want a good ATA. Grant Supp wrote:> Am I correct in assuming the iaxy (S101I) does not support comfort noise > generation (CNG)? I can tell a difference between a call placed using a > Grandstream 486 ATA and the iaxy. With the iaxy, when the other party is > silent, the sound level abruptly cuts off to zero. This is fairly > annoying and wouldn't be acceptable at a customers' presence. With the > 486, random background noise is still heard, more like a traditional phone. > > Does anyone have any suggestions or can recommend an ATA with high sound > quality? So far I have tested the Grandstream 286/486 (unreliable) and > Digium iaxy (S101I). I have not been able to find a reliable ATA that > has high sound quality.