hi all, i have a zyxel wifi phone running with SER. it registers fine, and i can dial out. However, i can't hear anything. configuration is as follows: zyxel behind nat (d-link home router) <->SER on public IP:5060 <->asterisk on same public IP:5070 i set up an extension on asterisk to play music, called it from the zyxel. no music. i am using rtpproxy. and the zyxel is set up with NAT=outbound proxy. if i do the same from an ATA behind the same nat, i get the music. does anyone have a zyxel working behind a nat, and have a config to share? or any other help? all help is much appreciated, yair