Multi-Tech Systems MTD-EVe manual Basic Operations, Interacting with Your Device Overview

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BASIC OPERATIONS

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

Related documentation for using EV-DO EV3 devices:

■EV-DO EV3 AT Commands Reference Guide (S000546) provides for additional information on AT commands available for your device. The Introduction chapter 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 separate driver installation guide for your device.

■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, TerraTerm, Kermit, or Putty.

Using Command Mode and Online Data Mode

Modems have two operation modes, command and online data. When you power up the modem it is in command mode and ready to accept AT commands.

Use AT commands to communicate with and configure your modem. They allow you to establish, read, and modify device parameters and control how the modem works. The device can also generate responses to AT commands that help determine the modem’s current state.

If the modem is in online data mode, it only accepts the Escape command (+++).

To send the modem AT Commands from terminal emulation software, set the software to match the modem’s default data format, which is:

■Speed: 115,200 bps

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QuickCarrierTM USB-D EV-DO MTD-EV3 User Guide

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Contents QuickCarrierTM USB-D EV-DO QuickCarrierTM USB-D EV-DO MTD-EV3 User Guide Contents EMC, Safety, and R&TTE Directive Compliance Overview MTD-EV3 SpecificationsProduct Overview DocumentationDimensions Link Status LED SMSPower Draw Turning the Device On or OffRadio Frequency RF Safety Safety Notices and WarningsGeneral Safety Sécurité relative aux appareils à radiofréquence RFInterference with Pacemakers and Other Medical Devices Device MaintenancePrecautions for pacemaker wearers Potential interferenceUser Responsibility Creating a Windows Dial-Up Connection Activation and Carrier Specific InformationAccount Activation for Cellular Devices Device Phone Number Testing Serial Ports Using LinuxShell Commands Create a PPP ConnectionQuickCarrierTM USB-D EV-DO MTD-EV3 User Guide Interacting with Your Device Overview Using Command Mode and Online Data ModeBasic Operations Related DocumentationVerifying Signal Strength AT+CSQReading Text Messages Checking Network RegistrationReading, Writing, and Deleting Messages Sending Text MessagesDeleting Messages Send the message. Enter CTRL+ZCFR Part 15 Regulation Class B Devices EMC, Safety, and R&TTE Directive ComplianceRegulatory Statements Industry Canada Class B NoticeInternational Modem Restrictions Other CountriesWeee Directive Environmental NoticesWaste Electrical and Electronic Equipment Statement Restriction of the Use of Hazardous Substances RoHS Substances of Very High Concern Svhc Reach StatementRegistration of Substances PBB 成分名称 Index Chinese hazardous substancesText messages Verify communication
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