What are the pros and cons of the codecs offered by the free version of 3CX? I am planning on going to the small business version which i understand has some non-free codecs that the free version obviously can't have. I just got a 3CX server up and running with softphones and in a couple days some hardware handsets (Aastra 480i). I am noticing some delay when connecting off-site, which won't be happening much, but nonetheless, and also echo when using the 3cx client on the internal network calling out or in. Any ideas? Thanks!