Chapter 1 - Introduction
Multi-Tech Systems, Inc. AT Commands for Wireless Modems with IP Connectivity (S000333D)
6
Chapter 1 - Introduction
This document describes the AT parameters and command set available to configure and drive the TCP/IP stack and
protocols available on wireless GSM/GPRS products that support IP connectivity.
TCP/IP features and protocols available:
•
PPP
•
GPRS
•
ICMP
•
DNS
•
SMTP
•
POP3
•
FTP
•
TCP socket
Definitions and Abbreviations
APN –
Access Point Name
<DLE> –
Escape Character
DNS –
Domain Name Server
<ETX> –
Escape Character
FTP –
File Transfer Protocol
GPRS –
General Packet Radio Service
GSM –
Global System for Mobile Communication
IP –
Internet Protocol
ISP –
Internet Service Provider
POP –
Post Office Protocol
PPP –
Point-to-Point Protocol
PSTN –
Public Switched Telephone Network
SMTP –
Simple Mail Transfer Protocol
Stack –
Low-Level Software
TCP –
Transmission Control Protocol
Presentation Rules
In the following chapters, the AT commands are presented with as much precision as possible, through three paragraphs.
Description –
The Description paragraph provides general information about the AT command or response behavior.
Values -
The Values paragraph provides the parameter values for the AT commands and their corresponding responses.
Syntax –
The Syntax paragraph describes the way to use the command, the possible response, or answers.
Schemas are provided where necessary.
Open TCP/IP Stack
Command
Responses
AT+WOPEN=1
Note: Start the TCP/IP stack
OK
AT+WOPEN=0
The TCP/IP stack is not opened. In some instances, this may be the default setting.
