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AC75 AT Command Set

10.8 AT^SISW

AC75_ATC_V01.002 Page 285 of 569 10/30/06

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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.

Number of data bytes already sent but not yet acknowledged at the TCP layer.

The value is constantly changing until the entire upload job has completed. If the value equals 0 all data sent so

far is acknowledged.

In binary mode, <unackData> includes the <cnfWriteLength> value of the pending write operation. There-

fore, the very first write operation of an upload job returns identical values for <cnfWriteLength> and

<unackData>.

This mechanism allows the host application to easily verify whether or not the remote host has successfully

received the data.

Parameter is not applicable to HTTP, POP3, SMTP and Socket with UDP protocol. For these services the

counter is always set to 0.

1 The service is ready to accept new user data.

2 Data transfer has been finished successfully and Internet service may be

closed without loss of data.

Notes

•The AT^SISW write command must be terminated only with the ASCII character set with ATS3. The factory

default for S3 is #13 (Carriage Return). Do not send any further characters after the S3 end-of-line identifier,

until the response "^SISW" is received. This is necessary to avoid that any characters related to the AT com-

mand can be interpreted as being part of the data stream to be transferred. Also refer to Section 1.4, AT Com-

mand Syntax.

• If the Socket service is configured for use as UDP client and fixed size and the interactive text mode is active,

the PDU length always equals the specified fixed length. If the input characters exceed the specified fixed

length, then all surplus characters will be ignored. If the input characters are less than the specified fixed

length, then the remaining range will be filled with "\0" bytes.

10.8.1 Usage of parameter <eodFlag>

(num)

(num)

Service type

Socket After the service accepts the end-of-data flag the service state changes to "Closing". No fur-

ther user data is accepted.

After releasing the TCP link the service remains in state "Down".

Parameter is not applicable to Socket with UDP protocol, i.e. value is ignored.

FTP Parameter only applicable for FTP upload session.

After accepting the end-of-data flag the service state changes to "Closing" and starts to end

the running FTP session.

No further user data is accepted.

After the FTP session is completed on FTP protocol level the service state switches to "Down".

In case of successful completion the URC "^SISW: x,2" is generated.

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