Hi, I've got a strange problem with my Sipura SPA-3000. I can make VoIP calls without problems, but when I dial a number that is supposed to go through @gw0 (PSTN line), I cannot hear anything and cannot be heard by the callee. The phone basically goes silent for all PSTN calls. (In all cases, I am dialing using an analogue phone connected to SPA-3000's FXS) Can anyone suggest why this happens and how it can be fixed? Thanks a lot, Serge