98-08901C68-O 277
Using the Commands
5.6 CHANGING THE CHARACTER SET
Example
In this example, you send the message (containing Hebrew characters) "Dekel1234???" to g20, while g20 is set to different
character sets (using the AT command CSCS).
When g20 is set with CSCS="ASCII", the received message is displayed as "Dekel1234". (Hebrew characters are not
displayed.)
at+CSCS="UCS2" //After changing the character set to UCS2
When g20 is set with UCS2, the received message is displayed as follows:
"00440065006B0065006C003100320033003405D305E705DC000D000A"
Encoding the received message:
Every four hexadecimal digits, which represent a 16-bit word, are used to represent one UCS2 character. Thus, the translation is:
0044D
0065e
006Bk
0065e
006Cl
00311
00322
00333
00344
05D3?
Note
When buffering the terminal message, data in the g20 (both inbound and outbound data), the following apply:
• Turning off the g20 clears any buffered data.
• Removing power from the g20 clears any buffered data.
• Whenever the terminal drops the PPP connection with the g20, via LCP terminate, the buffered data is cleared.
• Whenever the g20 drops the PPP connection with the terminal, with LCP terminate, the buffered data is cleared.
LCP termination triggers the termination of the data in the g20 buffer.
• Whenever the g20 drops the PPP connection with the terminal, without an LCP terminate, the buffered data is
cleared. Dropping the DTR also clears the buffer.
• When the network sends a deactivation message or a detached message, the g20 buffer is cleared.
• When the g20 transfers data in the uplink and GPRS coverage is lost, the data may flow-off. If the mobile has
lost coverage and is unable to send the packets from the terminal to the network, the buffers will continue to store
the packets until the buffers are full. The terminal will then be flowed off and the packets will be stored until they
can be sent to the GPRS network.
• The amount of time that takes before the user is notified is specified in the T3312 timer that is located in the
mobile side. The default delay time of T3312 is 54 minutes, as per the GSM 0408 specification. After 54 minutes,
the g20 deactivates the PDP session.
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