About GSM Modems

Usb Gprs Modem Driver

Make a new Dial-Up Connection and name it GPRS. Select Serial on CoM1 from Select a modem option. Click on Configure. Button in Modem menu and set the Port Settings as follows. Enter the command +CGDCONT=1,'IP','APN' (replace APN with the APN of your network provider) in the Extra Settings as shown in picture below. Gprs Modem Driver. Download32 is source for gprs modem driver shareware, freeware download - Virtual Serial Port Driver, USRobotics Sure connect USB Modem Linux Driver, 32bit Internet Fax, FaxAmatic, Virtual Serial Ports Driver, etc. Gprs Modem Driver, free gprs modem driver software downloads, Page 3. Windows device driver information for PCMCIA GPRS Wireless Modem. PCMCIA GPRS Wireless Modem is defined as a PC card that makes use of Tri band EGSM1800 as well as GSM 1900. PCMCIA GPRS Wireless Modem comes with a GPRS class 10 multi slot and GPRS class B class mobile station.

A GSM modem is a wireless modem that works with a GSM wireless network. A wireless modem behaves like a dial-up modem. The main difference between them is that a dial-up modem sends and receives data through a fixed telephone line while a wireless modem sends and receives data through radio waves. A GSM modem can be an external device or a PC Card / PCMCIA Card. Typically, an external GSM modem is connected to a computer through a serial cable or a USB cable. A GSM modem in the form of a PC Card / PCMCIA Card is designed for use with a laptop computer. It should be inserted into one of the PC Card / PCMCIA Card slots of a laptop computer. Like a GSM mobile phone, a GSM modem requires a SIM card from a wireless carrier in order to operate.

Both GSM modems and dial-up modems support a common set of standard AT commands. You can use a GSM modem just like a dial-up modem. In addition to the standard AT commands, GSM modems support an extended set of AT commands. These extended AT commands are defined in the GSM standards.

About GPRS Modems

A GPRS modem is a GSM modem that additionally supports the GPRS technology for data transmission. GPRS stands for General Packet Radio Service. It is a packet-switched technology that is an extension of GSM. (GSM is a circuit-switched technology.) A key advantage of GPRS over GSM is that GPRS has a higher data transmission speed.

GPRS can be used as the bearer of SMS. If SMS over GPRS is used, an SMS transmission speed of about 30 SMS messages per minute may be achieved. This is much faster than using the ordinary SMS over GSM, whose SMS transmission speed is about 6 to 10 SMS messages per minute. A GPRS modem is needed to send and receive SMS over GPRS. Note that some wireless carriers do not support the sending and receiving of SMS over GPRS. If you need to send or receive MMS messages, a GPRS modem is typically needed.

Overview of GSM/GPRS wireless modems

Overview of GSM/GPRS wireless modules

This article demonstrates how to connect Toradex module with a GPRS modem through dial-up connection for internet connectivity.

Overview

There are 2 ways to connect to a GPRS modem, one by dial-up connection and other by CellCore function which provides basic set of connection oriented services.

The CellCore module uses Radio Interface Layer (RIL) for communication with radio hardware. As most GPRS modems are not available with support for RIL, therefore dial-up connection is often used.

If you want to establish dial-up connection from application then you can refer RAS APIs from here.

Hardware setup

Connect GPRS modem to UART CoM1 port which is a FF UART (lower RS-232 on X25 connector of Evaluation Board V3.1A). You can also use other UART ports according to your requirement, for more information on serial ports, please refer this article.

Registry settings

Edit the following registry keys at HKLMDriversUnimodem.

When establishing a dial-up connection you must take care that the registry keys atHKCUControlPanelDial are set with correct country and area code. You can refer this article for more information.

Save the registry settings after editing.

Steps to establish connection with GPRS modem

Once the registry settings are done follow the steps mention below to connect GPRS modem with Toradex module through dial-up connection.

• Open Network and Dial-up Connections.

• Make a new Dial-Up Connection and name it GPRS.

• Select Serial on CoM1 from Select a modem option.

• Click on Configure... button in Modem menu and set the Port Settings as follows.

Gprs Modem Driver

• Enter the command +CGDCONT=1,'IP','APN' (replace APN with the APN of your network provider) in the Extra Settings as shown in picture below.

You can also set this parameter in registry as shown below.

• Click OK then Next. In Phone Number menu set the following parameters.

• Click on OK and it will create a new GPRS connection in Network Connection wizard.

• Right click on GPRS icon and click on Connect, then GPRS status dialog box will appear.

• Once the GPRS connection is established successfully, Connected message will appear on the dialog box.

NOTE

• The internet connection using GPRS modem is very slow, if you are using ping command to test the internet connection then it is recommended to use -w ping option to increase the timeout value from 1s to 3s (depending on your internet speed).

You can use the following command:

• While the Windows CE device’s USB client port is connected to a host (e.g. for debugging), the network connection is not accessible. For more information please refer this article.
• If your modem do not use DCD signal then it is recommended that you disconnect this signal from your connector. If you are using Colibri Evaluation Board V3.1A then you can remove the jumper (on X11) that connects UART_A_DCD and SODIMM_31. Alternatively, you can also connect SODIMM pin 31 to 3.3V.
• While establishing a dial-up connection, if a port not available message comes then please refer this article for more information.
• Not tested for Colibri T20, T30 and VFxx yet.

See also