Robustel M1000 MP User Guide - Manual (Page 19)

Robustel GoRugged M1000 MP User Guide
RT_UG_M1000 MP_v.1.0.0
20.12.2013 18 / 41
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 AT OK
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 OK
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.