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Overview of CDMA Modules

Introduction

CDMA Modules are similar to CDMA modems, but there's one difference: A CDMA Modem is an external equipment, whereas the CDMA Module is a module that can be integrated within an equipment. It is an embedded piece of hardware.

A CDMA modem is a wireless modem that works with CDMA networks. A wireless modem behaves like a Hayes compatible dial-up modem. The main difference between a standard Hayes modem and a CDMA modem is that a hayes modem sends and receives data through a fixed telephone line while a CDMA modem sends and receives data through radio waves.

A CDMA modem can be an external unit or a PCMCIA card (also called PC Card). An external CDMA modem is connected to a PC through a serial cable, a USB cable, Bluetooth or Infrared.

PC'suse AT commands to control a modem. CDMA modems and normal Hayes modems support a common set of AT commands. You can use a CDMA modem just like a hayes compatible modem.

CDMA modems support an extended set of AT commands.

  • Read, write and delete SMS messages.
  • Send SMS messages.
  • Monitor the signal strength.
  • Monitor the charging status and charge level of the battery.
  • Read, write and searche phone book entries.

The number of SMS messages that can be processed by a CDMA modem is pretty low, approx six messages per minute.

List of CDMA wireless modules

This is a list of CDMA wireless modules: