Reference : https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCkQFjAB&url=http%3A%2F%2Fnetworks.nokia.com%2Fsystem%2Ffiles%2Fdocument%2Fnsn_from_voice_over_ip_to_voice_over_lte_white_paper.pdf&ei=88Y7Vf3uJojguQS3pYDABw&usg=AFQjCNG3ZC1m0T4W6LiT1XuzXqo153Bq5w&sig2=7FqEkOpTCM0cTmSjML3G3Q&bvm=bv.91665533,d.c2Ey.
The analysis posted in 2013 , here I am recording them for my personal analysis to see what is the difference between projects and reality.
