diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index c84894f..c079ce4 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -246,10 +246,18 @@ void FGCom::postinit()
     app += _version_node->getStringValue();
 
     iaxc_set_callerid( _callsign_node->getStringValue().c_str(), app.c_str() );
-    iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_ULAW|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(_silenceThd_node->getFloatValue());
+    //iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_ULAW|IAXC_FORMAT_SPEEX);
+
+    iaxc_set_formats (IAXC_FORMAT_GSM, IAXC_FORMAT_ULAW|IAXC_FORMAT_GSM);
+
+
+
+
+    //iaxc_set_speex_settings(1, 5, 0, 1, 0, 3);
+
+    //iaxc_set_filters(IAXC_FILTER_AGC | IAXC_FILTER_DENOISE);
+    //iaxc_set_silence_threshold(_silenceThd_node->getFloatValue());
+    
     iaxc_start_processing_thread ();
 
     // Now IAXClient is initialized