修改

midware-api/src/main/java/midware/controller/rep/OutPhoneController.java

             } else {
                 return Error("主叫号码归属地未维护");
             }
+
+            if(EslCommon.existChannel(caller))return Error("主叫号码繁忙，请稍后再拨");
         }
         if (StringHelper.isEmpty(input.getCallee()) || input.getCallee().length() != 11) {
             return Error("被叫号码错误");
             } else {
                 return Error("被叫号码归属地未维护");
             }
+            if(EslCommon.existChannel(callee))return Error("被叫号码繁忙，请稍后再拨");
         }
         String ct = configService.getConfigValue("TrunkCount");
         if (EslCommon.sessions.size() >= Integer.parseInt(ct)) {

midware-service/src/main/java/midware/service/eslclient/EslCommon.java

     }
 
     //号码是否在会话中
+    public static boolean existChannel(String number) {
+        return channels.stream().anyMatch(p -> p.getNumber().equals(number));
+    }
+
+    //号码是否在会话中
     public static boolean isInSession(String number) {
         return channels.stream().anyMatch(p -> p.getNumber().equals(number) && !p.getSessionId().equals(""));
     }