Hi, I try to conect Mobigater Sip GSM Gateway with chan_celliax to Elastix, but the result is one way audio. There is no audio from GSM to Asterisk. I can hear normaly from Asterisk. Installing to the other Linux distro like Ubuntu, rPath and others solve the problem. It's appear to be a CentOS issue or not. I don't now. The gateway is recognized from Linux like USB modem and USB headphone speakers. Updating the kernel and alsa didn't help. Is it posibble to be a codec issue?