Robustel M1000 MP User Guide Manual de usuario descargar pdf (Pagina 19)

Robustel GoRugged M1000 MP User Guide

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3.1.2 AT Commands Examples

Followings are examples of some AT commands. Please refer to the AT command guide for a full description.

Description

AT commands

Modem response

Comments

Modem acknowledgement

Responding OK indicates that the modem is

ready.

Receiving signal strength

AT+CSQ

+CSQ: 19,99

The first parameter has to be at least 15 for

normal communication.

Query current PIN status

AT+CPIN?

+CPIN: READY

SIM card is correctly inserted and modem is

not pending for any password

+CPIN: SIM PIN

PIN1 is required

+CPIN: SIM PUK

PUK1 is required

Saves parameters in

non-volatile memory

AT&W

The configuration settings are stored.

3.2 CSD Connection

3.2.1 Overview

A Circuit-Switched Data Connection makes the wireless modem work in a manner similar to a regular analog modem.

CSD (Circuit Switched Data) is the original form of data transmission developed for cellular systems. By using a single

radio time slot, CSD is able to deliver 9.6 to 14.4 kbit/s data transmission to both the CELLULAR Network and PSTN

Switching Subsystem through direct calls. Most of the time, it is initiated by standard AT commands. Using the

modem to access remote devices by CSD is often more convenient than installing cables and data lines. Data

collection and monitoring will be more flexible since CSD can be used for applications that are hard to wire or hard

to access.

Note: Ensure that your SIM card has the CSD Service activated. For most regions, you must apply to your mobile

service provider to receive this service.

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Robustel M1000 MP User Guide Manual de usuario Pagina 19