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OK
6.9.2
Mobile Terminated (MT) Messages
MT messages are immediately sent to the application via the unsolicited message of +CSTD. The message is
NOT saved in the module.
Note: During a data call the multiplexer should be used to prevent an unsolicited message from not
reaching the application because there is no channel available to send the data.
6.9.2.1
Temporarily store SMS Messages
As a means to explore SMS messages while on a data call without having to write a multiplexing application,
SEMC suggests a temporary modification to receiving SMS messages. To test incoming SMS presentation
while on data, it is recommended that the SMS message be stored to memory and presented to the user after
the data call is complete.
Issue AT+CSRI=2,0 to save the messages.
Issue AT+CSLM to list all the stored messages.
After a message has been read from storage it is removed from storage.
Note: The CM52 only stores 10 SMS messages before it indicates to the network that there is no space
available to store an incoming message (the CM52 will also produce an unsolicited message to the
application that the buffer space is full). To erase the stored messages, list all the available messages
(AT+CSLM=2).
6.10
Data Communication
The intent of this section is to provide guidelines on how to set up CDMA data services using a dial-up
networking interface on a Windows based PC for the CM52.
6.10.1
Prepare CM52 for Data services
To use the data service features on the CM52, the following steps must be taken:
1. Make sure CM52 is set up correctly. Refer to section Acquiring Cellular Service.
2. To make a QNC or a 1xRTT HSPD call on the Verizon network, the account must have one of the
"NationalAccess" plans enabled. If not, call Verizon.
3. Ensure that the RS232 cable between the PC and the module is properly connected.
4. Set up the PC to support the CM52, as described below.
6.10.2
CM52 – Windows NT PC Installation Procedure
Go to Start->Settings->Control Panel and select the Modems icon.
Click the Add button, which will pop up a window titled, Install New Modem.
Select check box "Don't detect my modem; I will select it from a list." And click Next.
Select Have Disk and browse to the CM52 INF file, cm52.inf, and select Open.
Select OK on the "Install From Disk" pop-up window.
Select the Sony Ericsson CM52 Modem and click Next.
Select the COM port attached to the CM52 and click Next.
Select Finish.
Now highlight CM52 Modem and select Properties to set up the modem speed.
Set Maximum Port Speed to the CM52 baud rate, 115200 by default, and click OK.
Close the Modems Properties window.
Windows will ask to re-configure Dial-up Networking. Select Yes.
The Remote Access Setup Window will pop-up. Select Add.
Select the CM52 Modem device and select OK.
Confidential
USERS MANUAL
Document number
1/198 17-4/FCP 101 3045 Uen
143(158)
Revision
D
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