Siemens MC55 AT manual EodFlagnum, ReqWriteLength, CnfWriteLength num

•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".

<eodFlag>(num)

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.

<mode>(num)

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.
<cnfWriteLength>(num)
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.

MC55_ATC_V04.00	Page 249 of 475	3/17/06
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