Chapter 3 – Using Your Wireless Modem
20 Multi-Tech Systems, Inc. MultiModem GPRS Wireless Modem User Guide
This sets the modem to auto-answer. The call will be answered after the number of rings entered. x
stand for the number rings.
4. Call the number provided to you by the carrier.
To disconnect:
1. Type: +++
2. Wait about one second to see an OK response.
3. Type ATH
Using Short Message Services (SMS)
Sending a Short Message to a Specified Number
1. Type AT+CMGS="8585551212" <press Enter>
2. Then type your message: Please call me soon. <press ctrl Z>
3. The modem may respond with +CMGS:<mr> OK
Writing a Message to Memory
You can store a message to send it at a later date.
1. Type AT+CMGW="8585551212" <press Enter>
2. Type the message. <press ctrl Z>
3. The modem may respond with +CMGW: 4 OK (The message is stored in the index as message 4.)
Sending a Message from Storage
1. Type AT+CMSS=x,"8585551212" <press Enter>
2. The modem may respond with +CMSS: 1 OK (The transmission is successful. One SMS message is
sent.)
Note: The x represents an index location.
Viewing a List of Stored Messages
1. Type AT+CMGL=x <press Enter>
2. For x, substitute one of the following:
"REC UNREAD" Shows received unread messages.
"REC READ" Shows received read messages.
"STO UNSENT" Shows stored unsent messages.
"STO SENT" Shows stored sent messages.
"ALL" Shows messages.
3. The modem will respond AT+CMGL: 1,"REC UNREAD","8585551212",1...
4. The modem will continue until all UNREAD messages, numbers, and index number are listed.
Reading a Stored Message
1. Type AT+CMGR=x <press Enter>
2. The modem may respond with +CMGR: "REC READ", "8585551212", ......
Note: The x represents an index location.
Deleting a Stored Message
1. Type AT+CMGD=x,n <press Enter>
2. If you want to delete one message at a time, do not enter a value for n.
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