# 5.1.2.1.1.PLS8-E

* 1.規格
  * Penta Band LTE: 800/900/1800/2100/2600 MHz;
  * FDD-Band (20,8,3,7,1);&#x20;
  * Tri Band UMTS (WCDMA): 900/1800/2100 MHz; FDD-Band (8,3,1);
  * Dual Band GSM/GPRS/EDGE: 900/1800 MHz
* 操作
  * 1.切band到all band

    ```
       AT^SCFG="Radio/Band","2928787"
    ```
  * 2.用AT command撥號
    * 1.Open a serial connection

      ```
           /dev/ttyACM0
      ```
    * 2.Make sure you are registered to the network:

      ```
           AT+COPS?
      ```
    * 3.To employ GPRS, attach to the network:

      ```
           AT+CGATT=1
      ```
    * 4.Create an IP connection:

      ```
           AT+CGDCONT=1,"IP","internet"
           // internet shall be indicated as APN
      ```
    * 5.Activate the configured WWAN IP connection:

      ```
           AT^SWWAN=1,1
      ```
    * 6.Wait for the IP connection to be established by reading dynamic parameters:

      ```
           AT+CGCONTRDP=1
      ```
    * 7.Now the following two steps will have to be executed quickly. If taking longer than about ten seconds, the IP interface connection times out and will have to be activated again (from step 6)
    * 8.Manually ask the module's DHCP server for an IP address:

      ```
               #dhclient usb0
      ```
    * 9.Test your internet connection (for example, using Ping)
