Multi-tech-systems MultiModem Manual de usuario descargar pdf (Pagina 13)

Chapter 2 – Getting Started

Multi-Tech Systems, Inc. MultiModem Wireless Modem with Ethernet Interface (S000375A) 13

Using AT Commands

Important Note: Before you can use these commands, you must complete Steps 4.1 through 4.4 on page 9.

Query Your Modem's Operation

1. Check the signal quality.

• Type AT+CSQ

Modem responds with the received signal strength (rssi).

2. Check the identity of the modem.

Use command: ATI (AT is followed by the capital letter i).

• Type ATI0 (The command ends in a zero).

Manufacturing data displays: Wavecom Modem 800 1900

• Type ATI3

Software version displays. Ex: S/W VER: xxxxx

• Type ATI6

Capability data displays. Ex: +CGSM, +CIS707, ...

3. Check the network registration and roaming status.

• Type AT+CREG?

The modem will respond in one of the following ways:

+CREG: 0,0 (this tells you the modem is not registered on any network)

+CREG: 0,1 (this tells you the modem is registered on the home network)

+CREG: 0,5 (this tells you the modem is registered on a network but it is roaming)

Set Up a Circuit-Switched Data (CSD) Connection for

CDMA and GSM

A Circuit-Switched Data Connection makes the wireless modem work like a regular analog modem. You

must have CSD service in order to make a CSD call.

1. Establish a Connection: Using HyperTerminal or a terminal application, establish a CSD connection

by entering command: ATD<phone number>

Notes:

• The phone number you are calling is entered between the displayed brackets. Do not type

additional brackets. Ex: type only ATD 8585551212 between brackets.

• This command tells the modem to inform the wireless network that you are initiating a CSD modem

call. If you are dialing to another modem, the remote modem should answer and a connection

between the two modems will be established. If you include a semi-colon (;) at the end of the

dialing string, the modem will instead initiate a Voice call to the phone number dialed.

Disconnect: Use the following commands:

+++ Wait about 2 seconds to see OK.

Then type: ATH

Note: +++ is the escape sequence and ATH is the Hang-up command.

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Multi-tech-systems MultiModem Manual de usuario Pagina 13