Table of Contents
Advertisement
BASIC OPERATIONS
Chapter 6 – Basic Operations
Interacting with Your Device Overview
This section describes how to use AT commands to interact with your device. Using terminal software such as
Kermit, you can issue AT commands to communicate with and configure your modem. The AT commands let you
establish, read and modify device parameters and help you control how the device operates. This section
documents basic interactions with your device, such as verifying signal strength and network registrations, sending
and reading SMS text messages, and sending and receiving data.
Generally, USB modems are used as unintelligent bit pipes. In Windows, this means you create a dial-up network
connection that uses the Windows IP stack to use the modem to create a PPP connection to the cellular network.
The modem is assigned an IP address from the cellular carrier.
In Linux, PPPD is used to dial the modem and create the connection to the cellular TCP/IP network. This provides
Internet access for sending and receiving email, creating TCP/UDP Sockets, or putting and getting files from an FTP
server.
Related Documentation
For additional information, refer to the Telit ME910C1, AT Commands Reference Guide, P/N 80529ST10815A, Rev.
2. The guide describes command formatting, syntax, and other basic information.
Preparing the Modem for a Data Connection
Note:
This section applies to ME910C1-NA based devices only.
Set the APN by issuing the following command where <APN Name> is the APN assigned by the carrier.
AT+CGDCONT=1,"IP","APN_Name"
Check for registration by issuing AT+CEREG? and wait for the response. If the second value of the response (for
example, +CEREG:x,u) is 1, then the modem is registered on the home network. If u=5, then the modem is
registered but roaming. See the AT Command reference guide for other possible responses. If the second value is
not 1 or 5, then do not attempt to dial. Wait ~5 seconds for the modem to finish registration and check +CEREG
again.
Using the Radio IP Stack to Make a Data Connection
Connect by issuing the command:: AT#SGACT=1,1 (using PDP context #1).
Disconnect a Data Connection Using an Internal IP Stack
Issue the following command to disconnect: AT#SGACT=1,0.
Using the Host System IP Stack to Make a Data Connection
This device only supports packet data connections, such as dial-up networking. To make a data connection, you
must use a PPP dialer. If your carrier requires a username and password for the Internet connection, be sure to
enter that information into the PPP dialer. Dial up using ATD*99***1# (using PDP context #1).
Disconnect from the Operating System
Depending on your operating system, issue the appropriate system level command to disconnect from the system.
24
®
QuickCarrier
USB-D MTD-MVW1 User Guide
Advertisement
Table of Contents
