Codec Code

[kelvin]

hi Support,

 

 

what will be the code for Codec G723? in wiki only tell codecs ulaw (0), alaw(8), G.722 (9), G.726 (2) or GSM 6.10 FullRate (3). thx

 

regards,

kelvin

[Vodia PBX]

what will be the code for Codec G723? in wiki only tell codecs ulaw (0), alaw(8), G.722 (9), G.726 (2) or GSM 6.10 FullRate (3).

 

G.723 is not supported by pbxnsip. This codec is not worth it in a PBX environment:

• Bad audio quality (well, what can you expect from 5.3 kbit/s?)
  
• High CPU load (big problem for central network equipment that does support MoH and call barge in, recording)
  
• Show-stopper license terms (lots of patents, unclear situation who will take us to court us if we support it)
  

And don't forget that 5.3 kbit/s does not mean that a RTP session takes 5.3 kbit/s. The RTP packet overhead is somewhere in the 12-24 kbit/s area, depending on the packet size. Yepp, that's 3 times higher than the compressed audio information itself. Making G.723 even more pointless.

[kelvin]

G.723 is not supported by pbxnsip. This codec is not worth it in a PBX environment:

• Bad audio quality (well, what can you expect from 5.3 kbit/s?)
  
• High CPU load (big problem for central network equipment that does support MoH and call barge in, recording)
  
• Show-stopper license terms (lots of patents, unclear situation who will take us to court us if we support it)
  

And don't forget that 5.3 kbit/s does not mean that a RTP session takes 5.3 kbit/s. The RTP packet overhead is somewhere in the 12-24 kbit/s area, depending on the packet size. Yepp, that's 3 times higher than the compressed audio information itself. Making G.723 even more pointless.

 

ok. thanks

 

regards,

kelvin