3.6. Global Call SS7 Configuration of SIUs

The Global Call SS7 software is configured using the Intel® Dialogic Configuration Manager (DCM) as follows:

1. From the Action menu in the main DCM dialog box, choose Add Device.
   The DCM - Add Hardware Wizard is displayed.
2. Select SS7 as the device from the Family scroll box.
3. Select the Septel SIU in the model box.
4. Click Next.
   The DCM - Add Hardware Wizard prompts you for a name.
5. Enter a name for the SIU server. This is not used by the software but must be provided for proper operation of DCM.
6. Click Next.
7. Set the parameters:
   • From the System tab, you must set the following parameters:
     • Enter the HostID of the system. If there is only one host connected to the SIU(s), select ID 0.
     • ServiceModuleID defines the module ID used by the SS7 server. This must be one of the module IDs declared LOCAL in the system.txt file. Default value: 0x4d. See Section 3.2, System Environment Configuration (system.txt).
     • Other fields in the System tab may be left at their default values.
   • From the SIU Server tab, you must set the following parameters.
     • Enter the IP address of the SIU.
     • Specify the login and password for a valid FTP account on the SIU. SIUs provided more recently come with an FTP user account predefined (login "ftp" and password empty). For the SIU520, the login and password are both set to "siuftp" by default. See "Configuration procedure" in the Intel® NetStructure™ SIU520 Developer's Manual for more information. If required, also specify, in the RemoteConfigDir field, the directory on the SIU on which the config.txt file is located (for example, /home/dklsiu). For SIUs provided more recently, when using the predefined FTP account, you can leave this field at its default value, which is the dot (.) character.

     Note: If you are configuring a Dual-Resilient SIU system, you must add an SS7 device for each SIU that will have its own IP address (and potentially its own FTP account and directory data). The first configured SIU must be SIU A, and the second SIU B (see the DataKinetics documentation for more information about dual-resilient SIU configurations).

Setting the following parameters is optional:

• LogLevels controls the generation of SS7 server logging information. If set to All, the SS7 server will produce a log file that can be very useful in troubleshooting a system. See Chapter 6, Troubleshooting for more on this topic. The default value is All.
• LogMaxLines restricts the maximum length of an SS7 server's log file. The default value is 20000.
• AppModuleIDs defines the module IDs that the SS7 server can assign to applications. These must be declared LOCAL in the system.txt file. The format of the parameter is a space delimited list of module IDs. The default values are listed as 0x5d snd 0x6d.
• GCTLOAD Control determines if the GCTLOAD program should run automatically at startup. If set to Yes, the SS7 server will try to start the GCTLOAD program automatically. The default value is No.

  Note: This option should only be activated after you have adapted and fully tested your configuration since the GCTLOAD window, which provides very useful configuration debugging information, is no longer displayed when this option is selected.

• GCTLOAD Path contains the path to the GCTLOAD program file. This field must be set if the GCTLOAD Control parameter is set to Yes.
• WatchDogMaxTime defines the maximum time that the SS7 server waits for keep-alive notifications from the call control library. This mechanism allows the SS7 server to detect when an application has crashed or has exited without proper shutdown, and then frees for reuse the module ID to which the application was assigned. The default value is 8 seconds.

  Note: During step-by-step debugging sessions, the maximum watchdog time may easily be exceeded, causing the SS7 server to stop routing messages to the application process. Therefore, during debugging sessions, you should set the WatchDogMaxTime parameter to a higher value than the default.

  From the Dual Resilient tab:

• SiuCommandTimeout specifies the timeout value to use when waiting for group (de)activation command responses from an SIU. The default value is 5 seconds.
• SiuUpDebounceTime specifies the time to use when detecting SIU availability. This debounce avoids undertaking unnecessary actions in case of intermittent TCP/IP connection failures. The default value is 8 seconds.
• MaxCmdRetries specifies the maximum number of times the SS7 server reattempts sending a group (de)activation command to an SIU before declaring failure. A resend is required when the SIU is already performing a command for another host system. The default value is 5 attempts.

  From the Misc tab:

• FtpRetries defines the number of times the SS7 server will reattempt to get the config.txt file from an SIU.
• FtpTimeout defines the maximum time to wait for a response from an SIU while getting the config.txt file via FTP.
• SiuInitTimeout defines the maximum time that the SS7 server will wait at startup for an SIU to come on-line before considering it as being down.

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