LINUX AUDIO SENDER:

gst-launch-0.10 alsasrc ! audioconvert -v ! audio/x-raw-int,channels=1 ! mulawenc ! audio/x-mulaw,channels=1,rate=8000 ! udpsink port=9001 host=127.0.0.1

LINUX AUDIO RECEIVER:

gst-launch-0.10 -vvv -m udpsrc port=9001 ! audio/x-mulaw,channels=1,rate=8000 ! queue ! mulawdec ! audio/x-raw-int,channels=1 ! alsasink