Additional Topics > Medical Imaging in IDL > Using IDL DICOM Network Services > Defining a New Application Entity

## Defining a New Application Entity

To define a new Application Entity for a service, complete the following steps:

1. Select the Configuration tab of the DICOM Network Services utility that has been started in local or system configuration mode. See Starting the Network Services Utility for details.

2. In the Application Entities area, click the New button to invoke Application Entity definition mode. This desensitizes other utility areas and clears fields within the Application Entities area, shown in the following figure.

3. Configure the properties of the Application Entity as follows:

   Field | Description
   --- | ---
   Application Entity Name | A locally unique, descriptive identifier for the Application Entity consisting of a maximum of 30 characters.
   Application Entity Title | A non-unique identifier for the Application Entity consisting of a maximum of 15 characters. An Application Entity with the same title may support more than one service (e.g. support Query SCP and Storage SCP).
   Host Name | The machine host name or IP address consisting of a maximum of 30 characters. The term `localhost` is equivalent to the host name of the machine containing the IDL installation, typically the local machine. See Determining the IP Address for instructions on accessing a machine’s IP address.
   TCP/IP Port Number | The valid port number of the local or remote SCP service consisting of a maximum of 5 digits. Set to 9999 for a SCU service type. The default Exelis VIS-defined SCP service value is 2510. See Determining TPC/IP Port Numbers for information on returning port status.
   Service List Name | Select the service list type from the droplist. Options are: Query_SCP_Service_List Query_SCU_Service_List Storage_SCP_Service_List Storage_SCU_Service_List Echo_SCU_Service_List
   Service Type | Select the service type from the droplist. This value should correspond to the service list type selected in the previous field. Options are: Query_SCP Query_SCU Storage_SCP Storage_SCU Echo_SCU

4. Complete the Application Entity configuration. Click Save to save the Application Entity definition in the local or system configuration file. Click Cancel to dismiss the changes and exit Application Entity definition mode.
5. Stop and restart the Storage SCP Service any time you modify Application Entities that use the Storage_SCP service type while in system configuration mode (when you have started the DICOM Network Services utility with the SYSTEM keyword). See Managing the Storage SCP Service for details.