Chapter 6 - Basic Operations; Interacting With Your Device Overview; Related Documentation; Before You Begin - Multitech QuickCarrier USB-D User Manual

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. This connection provides Internet access and is the
basis for TCP/IP communication for sending and receiving email, creating TCP/UDP Sockets, or putting and getting
files from an FTP server.
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.

Before You Begin

Before you begin:
If you have not done so, install any drivers. Refer to the USB Driver Installation Guide for Telit Cat M1
Devices, P/N S00676.
Power up your device and ensure it is connected to the computer that you use to issue AT commands.
Install terminal software that can communicate with the device, such as HyperTerminal, Tera Term, Kermit,
or Putty.

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,"IPV4V6","APN_Name"
Check for registration by issuing AT+CEREG? and wait for the response of +CEREG: x,u. If response value u = 1, then
the modem is registered on the home network. If response value u = 5, then the modem is registered but roaming.
See the AT Command reference guide for other possible responses.
If response value u is not 1 or 5, 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 (using PDP context #1):
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QuickCarrier USB-D MTD-MAT1 User Guide
BASIC OPERATIONS
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