G-4500 demo program list & introduction using Borland C 

iAll_Demo_SIM300j
+---+-
    |
    +-Combine all of demos from SIM300 GSM/GPRS modem

iGPRS_SIM300j
+---+-
    |
    +-iTCP_Clientj
      +---+-
          |
          +-Simple TCP Client demo using the GPRS
    +-iUDP_Clientj
      +---+-
          |
          +-Simple UDP Client demo using the GPRS
    +-iSMTPj
      +---+-
          |
          +-Simple SMTP demo using the GPRS

iLCDj
+---+-
    |
    +-Display the number, text and BIG-5 Code Set (Traditional Chinese) by the LCD

imicroSDj
+---+-
    |
    +-Write a data to SD card, and immediacy read previous data for check

iIOj
+---+-
    |
    +-Control DI/O and AI

iTCP_DM32_Ethernetj
+---+-Client  Simple Cleint demo using the BSD socket
    |
    +-Server  Simple Server demo using the BSD socket

iSMS_Demo_SIM300j
+---+-
    |
    +-Send a message to assign phone number(block)

iSMS_Demo_SIM300_Loopj
+---+-
    |
    +-Send and Receive a message(no-block)

iSMS_Demo_SIM300_Loop2j
+---+-
    |
    +-Send and Receive a message(no-block)

iGPSj
+---+-
    |
    +-Simple demo using the GPS