Hi all together, i have following configuration: ISDN Phone ---> ASTERISK1/PRI ---> ASTERISK1/IAX ---> INTERNET --->INTERNET ROUTER (Port 5036 nat) ---> ASTERISK2/FXO/ANALOG DEV The call flows fine, but no sound will be transfered. On ASTERISK1 a message like "stopped sounds" occurs..... What' s wrong? Is there another port wich i have to nat ? Regards, thanks for help, Thomas. ******************************************* beroNet technologies GmbH Dipl.- Ing. Thomas H?ger Potsdamer Str. 18 A 14513 Teltow FON: +49 (0) 3328 3077731 FAX: +49 (0) 3328 334779 Email: thomas.haeger@beronet.com *******************************************