Howto: Asterisk and Opensource implementation of G.729 codec

You might still have to pay royalty fees to the G.729 patent holders for using their algorithm

With Asterisk when you place a call or receive a call you’ll get a warning about translation from ulaw to g729.
For example:

[Dec 16 09:48:56] WARNING[1143]: channel.c:2811 set_format: Unable to find a codec translation path from ulaw to g729

With little googling I found out this is rather easy problem to fix.

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