MC55_ATC_V04.00 Page 249 of 475 3/17/06
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• If Socket service is selected with UDP protocol
- <reqWriteLength>=0 can be used to send an empty UDP packet;
- the maximum requestable write size specified via <reqWriteLength> is limited to 1460 bytes. Any
attempt to write more bytes will be denied and causes the following URC to appear: "^SIS: <id>, 0, 9, The
supplied buffer was too small / large".
End of data indication flag.
Parameter is ignored for HTTP.
[0] No end of data. Other data may follow to be transmitted via the Internet service.
1 End of data is signalled to the Internet Service. Further AT^SISW write com-
mands return an error response. However, reading data may be possible. The
<eodFlag> is effective only if the <reqWriteLength> equals <cnfWrite-
Length>, in particular if the <reqWriteLength> equals 0.
If <mode> equals 1 the <eodFlag> is effective only if the write operation has
been finished with CTRL-Z.
Control how the application provides the data bytes to be sent.
[0] Binary mode
This mode allows sending a number of bytes defined with parameter
<reqWriteLength>.
1 Interactive text mode
This mode allows the user to type and send 8-bit ASCII characters while the
service is open. Ctrl-Z terminates data input and causes the data to be trans-
ferred.
Interactive text mode requires that the <reqWriteLength> is set to any value
greater than 0 (though it is not necessary to specify the precise number of
bytes). In this case the <cnfWriteLength> parameter indicates the maxi-
mum length of the data stream without control character CTRL-Z. The
<txCount> counter is incremented only by the portion of data actually trans-
mitted.
In interactive text mode, the following characters are defined as control codes:
• BACKSPACE ("\x08") deletes the last given character,
• CTRL-Z ("\x1a") terminates the input,
• ESC ("\x1b") aborts the command. An <eodFlag> is ignored in this case.
The V.25 command ATE also controls the echo mode of the interactive text
mode. If echo is enabled (ATE1) all characters are echoed until <cnfWrite-
Length> is reached. Any attempt to input further data ends up with the warn-
ing message 4001 indicated after the data stream has been completed with
CTRL-Z, nevertheless all data within the range of <cnfWriteLength> will be
sent. See also Section 10.10, Internet Service URC "^SIS". ATE0 disables the
echo mode generally.
0...1500 Confirmed number of data bytes which can be transmitted via the Internet ser-
vice configured in <srvProfileId>. In binary mode (see <mode>) this num-
ber may be less or equal to the value requested with <reqWriteLength>.
The application has to deliver exactly the number of bytes indicated by <cnf-
WriteLength>. A 0 value means that no data can be written at this time, i.e.
it serves as a flow control mechanism.
In interactive text mode, <cnfWriteLength> indicates the maximum number
of bytes it can process. Characters above the indicated number are ignored.
<eodFlag>
(num)
<mode>
(num)
<cnfWriteLength>
(num)
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