diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index 71d55ae..5e02e46 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -407,7 +407,7 @@ void FGCom::setupCommFrequency(int channel) {
 void FGCom::connectToCommFrequency() {
     // ensure that the current comm is still in range
 
-    SG_LOG(SG_SOUND,SG_INFO,"connectToCommFrequency");
+    SG_LOG(SG_SOUND,SG_INFO,"connectToCommFrequency:" << _currentCallFrequency);
 
     if ((_currentCallFrequency > 0.0) && !isInRange(_currentCallFrequency)) {
         SG_LOG(SG_SOUND, SG_WARN, "FGCom: call out of range of: " << _currentCallFrequency);
@@ -446,6 +446,9 @@ void FGCom::connectToCommFrequency() {
                 }
                 return;
             }
+            else 
+                SG_LOG(SG_SOUND, SG_WARN, "FGCom: frequency");
+
             if (!num.empty()) {
                 _currentCallIdent = iaxc_call(num.c_str());
                 if (_currentCallIdent == -1)
@@ -744,6 +747,10 @@ std::string FGCom::computePhoneNumber(const double& freq, const std::string& ica
 
 bool FGCom::isInRange(const double &freq) const
 {
+
+    // zhongjin 测试环境，始终返回1
+    return 1;
+   
     for(size_t i=0; i<sizeof(special_freq)/sizeof(special_freq[0]); i++) { // Check if it's a special freq
       if( (special_freq[i]) == getCurrentFrequencyKhz()) {
         return 1;