Does G.729 work well on Brekeke.

bryanint · Post by **bryanint** » Thu Mar 15, 2012 8:10 pm

1. Brekeke Product Name and version: Version 2.4.7.3 , Multi-Tenant

I am interested in using G.729 on my Brekeke PBX. I was wondering if it works well with the system? Is it worth licensing?

Thanks,
-B

taitan · Post by **taitan** » Fri Mar 16, 2012 10:11 am

http://wiki.brekeke.com/wiki/What-is-codec-G-729

G729 can reduce a bandwidth consumption.

bryanint · Post by **bryanint** » Fri Mar 16, 2012 10:26 am

Correct. I just wanted to see if anyone is having trouble using the codec.

I'm purchasing the licenses now and am going to make the changes at the user level to test.

How will I be able to tell if a call is actually using 729?

taitan · Post by **taitan** » Fri Mar 16, 2012 10:41 am

How about.. capturing audio packets with an analyzer?
http://www.wireshark.org/

voipwell.com · Post by **voipwell.com** » Fri Mar 23, 2012 9:09 am

Yes, packet capture or display the sessions by clicking the active session tab and then click on the session id to see the session detail which should show you the codec that the call leg is using.

bryanint · Post by **bryanint** » Fri Mar 23, 2012 9:27 am

Thanks. That is easier than wireshark.

Im showing payload: 0,PCMU. Wonder why I'm not getting g.729?

What are the settings on the Brekeke for g.729? I have 18,0 in the user field in codec priority.

I have the VoIP phone set to g.729 as priority as well.

I bought 20 licenses last week.

Tata · Post by **Tata** » Fri Mar 23, 2012 12:23 pm

Are both parties (caller and callee) supporting G.729?
If one of them doesn't support G.729, other codec (maybe G.711) will be used.

voipwell.com · Post by **voipwell.com** » Fri Mar 23, 2012 2:03 pm

There are two legs to the call so make sure you check both legs of the call. From the phone to the pbx is the first leg and from the pbx to the provider is the second leg. If both are showing pcmu then go ahead and make the user codec 18 instead of 18,0. that way the call should fail if it cannot establish g729. Also you could change the codec choices in the options tab of the pbx to g729 18 only to help diagnose your problem. Restart the pbx after making a change to options.

Brekeke has a very good implementation of G729. I have always been a fan of the sound quality of ILBC which the PBX also supports but few hard phones support it. Most softphones do and it sounds great.

bryanint · Post by **bryanint** » Fri Mar 23, 2012 3:00 pm

Thanks for the help. I'll do some testing this weekend.

voipwell.com · Post by **voipwell.com** » Sat Mar 24, 2012 9:08 pm

Also, don't forget to check Use Remote Preferred Codec because a remote device can insist on pcmu if "use Remote Preferred Codec" set to yes in options tab of pbx and remote phone requesting pcmu.

There are three places codec can be chosen in pbx.

1) user
2) ARS
3) Options tab

Force your phone to use g729 only in your phone's configuration GUI and check results.

Hope this helps.

bryanint · Post by **bryanint** » Mon Mar 26, 2012 7:47 am

Setup codec 18,0 in user settings and ARS tables and looked at the call detail and it says G.729.

Thanks for the help.