Quectel UC20 Application Note

UMTS/HSPA Module Series
UC20 PPP Application Note
UC20_PPP_Application_Note Confidential / Released 3 / 29
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 4
Figure Index ................................................................................................................................................. 5
1 Introduction .......................................................................................................................................... 6
2 Application Mode ................................................................................................................................. 7
3 Procedure for PPP Setup .................................................................................................................... 8
3.1. General Procedure for PPP Setup .............................................................................................. 8
3.2. Recommended Procedure for PPP Setup .................................................................................. 9
4 UART/USB for PPP Connection ....................................................................................................... 11
4.1. Data Mode and Command Mode .............................................................................................. 11
4.1.1. Switch from Data Mode to Command Mode .................................................................. 11
4.1.1.1. Use DTR Level Switch from Data Mode to Command Mode ................................. 11
4.1.1.2. Use Sequence +++ to Switch from Data Mode to Command Mode ...................... 11
4.1.2. Switch from Command Mode to Data Mode .................................................................. 12
4.1.2.1. Use ATO to Switch from Command Mode to Data Mode ....................................... 12
4.2. Terminate the Connection ..................................................................................................... 12
4.3. Handle URC in Data Mode .................................................................................................... 13
4.4. Data Carrier Detect (DCD) Function Mode ........................................................................... 13
5 PPP Dial-up in Windows .................................................................................................................... 14
5.1. Preparation ............................................................................................................................ 14
5.2. Modem Configuration ............................................................................................................ 14
5.2.1. Add a New Modem ......................................................................................................... 14
5.2.2. Configure the Modem Driver .......................................................................................... 18
5.3. Dial-up Network Configuration .............................................................................................. 20
5.3.1. Create a New Connection .............................................................................................. 20
5.3.2. Configure the Connection .............................................................................................. 21
5.3.3. Configure the Dial-up Tool.............................................................................................. 22
5.3.4. Establish the Dial-up Connection ................................................................................... 23
6 PPP Dial-up in Linux .......................................................................................................................... 25
6.1. Prepare PPPD and CHAT ..................................................................................................... 25
6.2. Create Script Files ................................................................................................................. 25
6.3. Set up PPP Connection by PPPD ......................................................................................... 26
7 Appendix A Reference ....................................................................................................................... 28
Quectel
Confidential

Quectel UC20 Specifications

General

Brand	Quectel
Model	UC20
Category	Control Unit
Language	English