How to Establish a GPRS Connection Using MOBITEK Q24 Modem

REVISION HISTORY

COPYRIGHT

© 2009 MOBITEK System Sdn. Bhd. All rights reserved.

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DISCLAIMER

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Furthermore, MOBITEK reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation to notify any person of such revision or changes.

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ACKNOWLEDGEMENT

We like to thank Mr. Ang Yit Lun, a student from University Putra Malaysia, for contributing to this manual.

INTRODUCTION

General packet radio service (GPRS) is a packet oriented mobile data service available to users of the 2G cellular communication systems global system for mobile communications (GSM). In 2G systems, GPRS provides data rates of 56-114 kbit/s. (Source: http://en.wikipedia.org/wiki/General_Packet_Radio_Service)

This manual provides step-by-step guide on setting up a GPRS connection using GPRS modem.

BENEFITS

1. GPRS modem can be used as a back-up for ADSL modem and fixed-line broadband. In the event that ADSL modem and fixed-line broadband fail, internet connection can still be accessed via GPRS modem (assuming that the GSM network operator does not use the same fixed-line).

SYSTEM REQUIREMENTS

1. PC running on Windows OS.
2. Serial port or USB port
3. GPRS modem:-
   a) MOBITEK® Q24 Modem, Model S-657f ; or
   b) MOBITEK® Q24 Modem, Model U-657f ; or
   c) Wavecom Modem, Fastrack Supreme 10

SETTING-UP MODEM TO CONNECT WITH GPRS

Objective:-

• To show you how to set up modem to connect with GPRS
• To connect to internet at PC by using GPRS

To connect the GPRS, there are 3 parts where need to configure:

1. AT Command
2. Add a new hardware
3. Create a network connection

Part 1: GPRS AT Command Configuration

Step 1: At the beginning, enter the:

• Connection name
• Connection icon

Step 2: Choose your connecting port number. In this experiment, COM1 will be chosen.

Step 3: Choose 115200 as your bits per second.

Step 4: Enter the AT command like below:

AT Command explanation:

Alfred: Connect to GSM network

AT+CREG?

+CREG: 0,1

OK

Alfred: Check the connection to GPRS. (Pg. 417/449)

+CGREG: <n>,<stat>

<stat> = 0, not register

<stat> = 1, register (home network)

AT+CGREG?

+CGREG: 0,0        <– not connected to GRPS

OK

Alfred: GPRS attach or detach. (Pg. 407/449)

AT+CGATT=<state>

<state> = 0, detach

<state> = 1, attach

<state> = 2, combine detach (GPRS and GSM detach in the same network request)

AT+CGATT=1         <– connect to GPRS

OK

AT+CGREG?

+CGREG: 0,1        <– connected to GPRS

OK

Alfred: Define PDP context (Pg. 398/449)

AT+CGDCONT=?

+CGDCONT: (1-4),”IP”,,,(0-1),(0-1)

+CGDCONT: (1-4),”PPP”,,,0,0

OK

Alfred:Define new PDP context (Pg. 398/449)

Access Point Name (APN) for Maxis is “net”, Digi is “diginet”

AT+CGDCONT=1,”IP”,”net”        <– APN setting for Maxis

OK

Step 5: Press the disconnect button to disconnect the connection between Hyper terminal and GSM modem.

Part 2: Add A New Modem

There are 2 methods to add a new modem:-

1. via “Add Hardware Wizard”
2. via “Phones and Modem Options”

Method 1 – “Add Hardware Wizard”

Step 1: Choose “Yes, I have already connected the hardware” if the hardware is connected.

Step 2: Choose “Add a new hardware device” and click “Next”

Step 3: Select “Install the hardware that I manually select froma list” and click “Next”

Step 4: Select “Modems” since need to installe a new modems. Click “Next” after that.

Step 5: Click “Next”

Step 6: Click “Next”

Step 7: Select “Standard Modem Types” and “Standard 56000 bps Modem”. Click “Next” afterward.

Step 8: Select “COM 1” and click “Next”

Step 9: Click “Finish”

Method 2 “Phone and Modem Options”

There are 2 ways to add a new modem

1. via “Add Hardware Wizard”
2. via “Phones and Modem Options”

This section describes method no. 2.

Go to Control Panel > Phone and Modem Options (figure below) > Modems (tab) > Add (button)

After “Add” button is clicked, then “Add Hardware Wizard” form will appear (figure below), and the process is the same with Method 1.

Part 3: Create a network connection

Step 1: Double click “New Connection Wizard” and click “Next”

Step 2: Select “Connect to the internet”

Step 3: Select “Set up my connection manually”

Step 4: Select “Connect using a dial-up modem”

Step 5: Insert ISP name as “maxis”

Step 6: Insert the phone number.

1. For MOBITEK® Q24 Modem, enter – *99#
2. For Wavecom Modem, enter – *99***1#

Step 7: Insert user name and password

1. For MOBITEK® Q24 Modem, enter:-
   • User name: maxis
   • Password: wap
2. For Wavecom Modem, enter:-

• User name: (leave blank)
• Password: (leave blank)

Step 8: Click “Finish”

Step 9: At the moment, you will see a dial up connection box appear, jus click “Dial”

Step 10: If the connection is successful, you will see a connection icon as below.

APPENDIX 1

At the end is found that there are some insufficient complete of security system at maxis, where below are the explanation of it.

1. 1. Regarding the Maxis GPRS setting, the user name is “maxis” and password is “wap”. However, if other user name such as “umobile” and “hotlink” was created during new connection setting, and the password with “wap”, the connection still connected. In fact, connection only can be connected when the user name and password are valid. Below show the example.

1. In this GPRS connection setting, the APN name “unet” and “net” also can be use.
2. In this GPRS connection setting, the APN name can be in small capital letter and big capital letter.

APPENDIX 2

GPRS SETTING FOR ALL CELCO