HI all, Anyone who's deployed SER and Asterisk together, just wanted to know that what are difference in functionalities between SER and Asterisk. I mean people generally use SER as front end to do NAT and stuff. Asterisk is generally used behind SER to maintain the dialplan and appropriate routing. I was wondering if Asterisk can to Natting and SER can be used as a registrar to store information, why cant we use them interchangeably? Is there any specific killer function these two have which are different? Thanks, Hitesh.