(Optional) Setting the GSM Modem

Prerequisites

The storage device is connected to a GSM modem that is properly installed.

Context

• If the GSM modem is not hot-swappable, do not insert or remove it when it is running.
• If the storage system is enabled with short message notification, the serial port on the controller enclosure serves only the GSM modem.
• For a storage system with more than eight controllers, a GSM modem can be configured only for the first eight controllers.
• For a 4 U controller enclosure, connect the GSM modem to the serial port on management module 0. If the serial port on management module 0 is faulty, connect the GSM modem to the serial port on management module 1.

This section describes how to configure a GSM modem, with the COM1 serial port (baud rate = 115200 bits/s) and the DB9 serial port on the GSM modem (default baud rate = 9600 bits/s) used as an example.

Procedure

1. Insert a SIM card into the GSM modem.
2. Connect the GSM modem to the serial port on the maintenance terminal through a DB9 serial cable.
3. Insert the power cable of the GSM modem into the power supply outlet, and then power on the GSM modem.

   If the red indicator blinks, the GSM modem is successfully installed.

4. Run PuTTY. In the Category navigation tree, choose Session > Logging. The Basic options for your PuTTY session page for configuring the GSM modem is displayed, as shown in Figure 5-18.
   Figure 5-18 Basic options for your PuTTY session
   

5. Click Open.
6. Run the at command on the COM1-PuTTY page.
   • If OK appears, the GSM modem is connected to the host through the serial port. Go to Step 9.
   • If there is no response to the command, the GSM modem has been disconnected from the serial port. Go to Step 7.

7. Re-log in to the page for configuring the GSM modem, as shown in Figure 5-19.
   Figure 5-19 Page for configuring the GSM modem
   

8. Reset the baud rate of the GSM modem until the at command is responded with OK.
   • If the baud rate of the GSM modem is not known, try to set it multiple times until the baud rate of the GSM modem and that of the serial port are consistent. In this condition, PuTTY can be used to configure the GSM modem.
   • The baud rate can be configured using the command at+ipr=115200.

9. Set other parameters, for example whether to reply automatically.
10. Click OK to save and exit.

    You can run the following commands to view the configuration. The following command output indicates that the configuration is successful.

     
    at 
    OK 
    at+ipr=115200 
    OK 
    ats0=1 
    OK 
    at&w 
    OK     

11. Upon successful configuration, connect the GSM modem to the serial port of the storage system for use.

    For details about configuring the GSM modem, see the associated manual delivered with the GSM modem.