We have a 2851 that is connected via one of the FXS ports to a Valcom V-9970 paging controll unit which then connects to a Bogen Multicom 2000. When We dial 31 which is my dial-peer pointing out the FXS port it rings once then picks up. We can then put in codes and then page. However sometimes the connection disconnects during the page. Is there something I should have configured on the FXS port? currently my FXS port configuration is set to default.