Chapter 6 - Basic Operations; Interacting With Your Device Overview; Before Using The Device; Using The Radio Ip Stack To Make A Data Connection - Multitech QuickCarrier USB-D MTD-MNA1 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.

Before Using the Device

Before using the device:
Install any drivers. Refer to the separate driver installation guide for your device.
Power up your device and ensure it is connected to your computer that issues AT commands.
Note: Wait 10 seconds after power-up before issuing any AT commands.
Install terminal software that can communicate with the device, such as HyperTerminal, Tera Term, Kermit,
or Putty.
For additional information, refer to the AT command guide and any related documentation for your device. The AT
command guide describes command formatting, syntax, and other basic information.

Using the Radio IP Stack to Make a Data Connection

Connect by issuing the command: AT#SGACT=1,1 (using PDP context #1).

Disconnecting 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).
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QuickCarrier USB-D MTD-MNA1 User Guide
BASIC OPERATIONS
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