Quectel EC200U Series Application Note
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Quectel EC200U Series Application Note

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EC200U&EG915U Series
PPP Application Note
LTE Standard Module Series
Version: 1.1
Date: 2021-08-17
Status: Released

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Summary of Contents for Quectel EC200U Series

  • Page 1 EC200U&EG915U Series PPP Application Note LTE Standard Module Series Version: 1.1 Date: 2021-08-17 Status: Released...
  • Page 2 To the maximum extent permitted by law, Quectel excludes all liability for any loss or damage suffered in connection with the use of the functions and features under development, regardless of whether such loss or damage may have been foreseeable.
  • Page 3 LTE Standard Module Series Copyright The information contained here is proprietary technical information of Quectel. Transmitting, reproducing, disseminating and editing this document as well as using the content without permission are forbidden. Offenders will be held liable for payment of damages. All rights are reserved in the event of a patent grant or registration of a utility model or design.

  • Page 4: About The Document

    LTE Standard Module Series About the Document Revision History Version Date Author Description 2021-04-16 Baron ZHENG Creation of the document 2021-05-10 Baron ZHENG First official release 2021-08-17 Baron ZHENG Added an applicable module series EG915U. EC200U&EG915U_Series_PPP_Application_Note 3 / 28...

  • Page 5: Table Of Contents

    LTE Standard Module Series Contents About the Document ........................... 3 Contents ............................... 4 Table Index ..............................5 Figure Index ..............................6 Introduction ............................7 PPP Application Mode ......................... 8 PPP Setting ............................9 3.1. General Procedures for PPP Setting ................... 9 3.2.
  • Page 6 LTE Standard Module Series Table Index Table 1: Related Documents ........................27 Table 2: Terms and Abbreviations ......................27 EC200U&EG915U_Series_PPP_Application_Note 5 / 28...
  • Page 7 LTE Standard Module Series Figure Index Figure 1: PPP Application Mode ........................8 Figure 2: General Procedures for PPP Setting .................... 9 Figure 3: Flowchart of Recommended Procedures for PPP Setting ............10 Figure 4: Search for “Phone and Modem” in Control Panel ..............17 Figure 5: Add a New Modem ........................

  • Page 8: Introduction

    LTE Standard Module Series Introduction This document briefly introduces the PPP functions of Quectel’s EC200U and EG915U series modules, including PPP application modes, setting procedures, connection modes, termination steps and dialing examples. EC200U&EG915U_Series_PPP_Application_Note 7 / 28...

  • Page 9: Ppp Application Mode

    LTE Standard Module Series PPP Application Mode The usage of PPP (Point-to-Point Protocol) is illustrated in the following figure. Use UART port or USB port for PPP connection. The module provides a PPP server for application, and the application provides a PPP client for the module.

  • Page 10: Ppp Setting

    LTE Standard Module Series PPP Setting 3.1. General Procedures for PPP Setting After the module registers on GPRS network, it is necessary to set the APN for PPP by AT+CGDCONT and to start PPP by ATD*99#. After executing ATD*99#, the module will enter the PPP frame interaction process, which is based on standard PPP protocol.

  • Page 11: Recommended Procedures For Ppp Setting

    LTE Standard Module Series 3.2. Recommended Procedures for PPP Setting Power on the module Recommended Power-on/off: For details of the recommended power-on/off methods of each 1. Synchronization between TE and TA. applicable module, see their 2. Fix and save baud rate by AT+IPR=xxx&W. If Hardware Design documents USB modem port is used, this could be ignored.
  • Page 12 LTE Standard Module Series When the module is powered on, if the main UART is used, set the baud rate by executing AT+IPR=xxx;&W. Before executing ATD*99# to set PPP, you must check the status of the (U)SIM card by AT+CPIN?. When the (U)SIM card is ready, please periodically check the network registration status by AT+CREG? and AT+CGREG? until the network is prepared.

  • Page 13: Ppp Connection Modes

    LTE Standard Module Series PPP Connection Modes 4.1. Data Mode and Command Mode The module communicates with application via USB or UART port (including AT commands and data). USB and UART ports have two working modes: data mode and command mode. The two ports are in command mode before PPP is set, and the module can execute AT commands in this mode.

  • Page 14: Switch From Command Mode To Data Mode

    LTE Standard Module Series NOTE Please perform the above operations after completing the PPP negotiation, otherwise the above operations will terminate the PPP negotiation and the USB/UART port will exit the data mode. After completing the PPP negotiation, when the USB/UART port switches to the command mode, the input data will be treated as AT command, and the module maintains the PPP connection.
  • Page 15 LTE Standard Module Series NOTE When switching module’s USB/UART port from data mode to command mode (by using +++), the DCD state remains unchanged. EC200U&EG915U_Series_PPP_Application_Note 14 / 28...

  • Page 16: Ppp Connection Termination

    LTE Standard Module Series PPP Connection Termination There are two methods to terminate the PPP dial-up connection: Terminate the PPP connection through the LCP Terminate-Request message, and this method is recommended. TA can also terminate the PPP connection by changing the DTR level. Set the DTR function by AT&D2 first, change the DTR level from low to high, and the data connection will be automatically terminated.

  • Page 17: Ppp Dial-Up Operations

    LTE Standard Module Series PPP Dial-up Operations This chapter introduces how to establish PPP dial-up in Windows 10. For detailed operations in Linux operating system, see document [3]. 6.1. Preparation It is necessary to finish the following steps before establishing a PPP dial-up connection in Windows. 1.
  • Page 18 LTE Standard Module Series Search for “Phone” in the main interface, and then click “Phone and Modem” as follows when it appears: Figure 4: Search for “Phone and Modem” in Control Panel EC200U&EG915U_Series_PPP_Application_Note 17 / 28...
  • Page 19 LTE Standard Module Series Double-click the “Phone and Modem”, and select “Modems” → “Add…” to add a new modem, as shown in the following figure. Figure 5: Add a New Modem EC200U&EG915U_Series_PPP_Application_Note 18 / 28...
  • Page 20 LTE Standard Module Series Follow the instructions on the screen to install the new modem: select “Standard 19200 bps Modem” and then the port (such as “COM10”) to be installed; click “Next” button until the configuration is complete. For details, see the figure below. Figure 6: Select Model of the Modem EC200U&EG915U_Series_PPP_Application_Note 19 / 28...
  • Page 21 LTE Standard Module Series Figure 7: Select a Port Figure 8: New Modem is Installed Successfully EC200U&EG915U_Series_PPP_Application_Note 20 / 28...

  • Page 22: Configure The Modem Driver

    LTE Standard Module Series 6.2.1.2. Configure the Modem Driver Select the installed “Standard 19200 bps Modem” and click the “Properties” button. After entering the interface, select the “Modems” option and modify the “Maximum Port Speed” to “115200” (default value). Click the “Advanced” option, configure “Extra Settings” and input AT+CGDCONT=1,"IP","CMNET" as shown below.

  • Page 23: Dial-Up Network Configuration

    LTE Standard Module Series NOTE In the example above, the settings predefine a PDP context where CID=1, PDP type=IP and APN=CMNET. CMNET is the APN of the network operator China Mobile and it should be replaced with the value provided with the value defined by the network operator. 6.2.2.
  • Page 24 LTE Standard Module Series Select “Connect to the Internet”, click “Next”. Then click “Set up a new connection anyway” and “Dial-up” to connect as illustrated in the following figure. Figure 11: Set up the New Connection EC200U&EG915U_Series_PPP_Application_Note 23 / 28...

  • Page 25: Configure The Connection

    LTE Standard Module Series 6.2.2.2. Configure the Connection Enter number (such as “*99#”) in “Dial-up phone number”, and then click “Connect” button, as illustrated below. Figure 12: Configure the Connection EC200U&EG915U_Series_PPP_Application_Note 24 / 28...

  • Page 26: Configure The Dial-Up Tool

    LTE Standard Module Series 6.2.2.3. Configure the Dial-up Tool Enter number (such as “*99#”) in “Dial” window, click “Properties” button, and configure the “Standard 19200 bps Modem (COM10)”. Then select “115200” from the drop-down list of “Maximum speed”. Click “OK” button to finish the configuration. See the following figure for details. Figure 13: Configure the Dial-up Tool EC200U&EG915U_Series_PPP_Application_Note 25 / 28...

  • Page 27: Establish The Dial-Up Connection

    LTE Standard Module Series 6.2.2.4. Establish the Dial-up Connection After the above operations, click the “Dial” button, the interface will pop up a prompt box “Verifying username and password”, and the pop-up box quickly pops up “Connected” to indicate a dial-up connection.

  • Page 28: Appendix References

    LTE Standard Module Series Appendix References Table 1: Related Documents Document Name [1] Quectel_EC200U_Series_Hardware_Design [2] Quectel_EG915U_Series_Hardware_Design [3] Quectel_LTE&5G_Linux_USB_Driver_User_Guide Table 2: Terms and Abbreviations Abbreviation Description Access Point Name CHAP Challenge Handshake Authentication Protocol Data Carrier Detection Domain Name Server Data Terminal Ready GPRS General Packet Radio Service Global System of Mobile Communication...
  • Page 29 LTE Standard Module Series Password Authentication Protocol Personal Computer Packet Data Protocol Personal Identification Number Point-to-Point Protocol Ring Indicator Terminal Adapter Terminal Equipment UART Universal Asynchronous Receiver Transmitter Universal Serial Bus (U)SIM (Universal) Subscriber Identity Module EC200U&EG915U_Series_PPP_Application_Note 28 / 28...

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