I have two site configured. Site A is connected to the Service providers end (FXOs and NM). Site B has FXS and they are configured as per the attached files. When we call from site B, the calls go through fine but there is no ringing. when the call is answered, you can hear the other user talking but the other user cannot hear you. Also, when a call comes in from outside, the outside user hears everything but the reciepients at site B does not hear any thing. Please help. this is urgent.