diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index 6c1095c88..f9445ead5 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -233,6 +233,8 @@ void FGCom::postinit()
     iaxc_set_callerid( _callsign_node->getStringValue(), app.c_str() );
     iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_SPEEX);
     iaxc_set_speex_settings(1, 5, 0, 1, 0, 3);
+    iaxc_set_filters(IAXC_FILTER_AGC | IAXC_FILTER_DENOISE);
+    iaxc_set_silence_threshold(-20.0);
     iaxc_start_processing_thread ();
 
     // Now IAXClient is initialized
diff --git a/utils/fgcom/fgcom.cxx b/utils/fgcom/fgcom.cxx
index 9ebc88f39..f4a630f13 100644
--- a/utils/fgcom/fgcom.cxx
+++ b/utils/fgcom/fgcom.cxx
@@ -450,6 +450,8 @@ main (int argc, char *argv[])
   iaxc_set_callerid ( callsign, app.c_str() );
   iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_SPEEX);
   iaxc_set_speex_settings(1, 5, 0, 1, 0, 3);
+  iaxc_set_filters(IAXC_FILTER_AGC | IAXC_FILTER_DENOISE);
+  iaxc_set_silence_threshold(-20.0);
   iaxc_set_event_callback (iaxc_callback);
 
   iaxc_start_processing_thread ();