No voice for voiceblue gateway , asterisk server behind nat


#1

I have installed asterisk server and voiceblue gateway, for normal phone call through isdn line, for mobile call throgh voiceblue gataway.

From internal sip clients can make normal phone and mobile call. but from out side clients who only can make normal call , for mobile call only can connect but no voice (asterisk server behind nat) . can you help .

thanks,