diff --git a/utils/fgcom/fgcom_external.cxx b/utils/fgcom/fgcom_external.cxx
index e899a8b..cc9a423 100644
--- a/utils/fgcom/fgcom_external.cxx
+++ b/utils/fgcom/fgcom_external.cxx
@@ -466,8 +466,9 @@ int version()
 
 std::string computePhoneNumber(double freq, std::string icao, bool atis)
 {
-    if(icao.empty())
-        return std::string(); 
+    // zhongjin 测试环境，去掉机场编号
+    //if(icao.empty())
+    //    return std::string(); 
 
     char phoneNumber[256];
     char exten[32];
@@ -486,6 +487,7 @@ std::string computePhoneNumber(double freq, std::string icao, bool atis)
              (int) (freq * 1000 + 0.5) );
     exten[16] = '\0';
 
+    // zhongjin 测试环境，去掉机场编号
     sprintf( exten,
              "%02d%06d",
              01,