diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index 47340ab..8bf1aa5 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -277,10 +277,10 @@ 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_formats (IAXC_FORMAT_GSM, IAXC_FORMAT_ULAW|IAXC_FORMAT_GSM);
+    //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_speex_settings(1, 5, 0, 1, 0, 3);
     //iaxc_set_speex_settings(1,-1,-1,0,8000,3);
 
     /*