Siemens AC75 User Manual

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AC75_ATC_V01.002

Page 274 of 569

10/30/06

Confidential / Released

The 

 write command starts the Internet session configured by the service profile. All further steps

needed to control the session depend on whether you are using URC mode or polling mode. The 

 read

command returns the current status of all services.

URC mode:

If the service opens successfully, the URCs "

" and "

" will trigger the action to follow, either writing

data with 

 or reading data with 

. To terminate an upload data stream set the 

within the last 

 command. If the URCs notify that a data transfer has been successful ("

: x, 2" or

: x, 2"), the service can be closed with 

. If a special event occurs, e.g. an error or a warning,

after opening or while using a service then the URC type "

" will be delivered. 

Polling mode:

After opening the service, all progress information needed to control the session shall be explicitly requested by

the host application. The particular sequence of AT commands varies depending on the service used. The fol-

lowing list summarizes, by way of an example, the steps normally involved in managing an upload or download

job. 
• Upload (Socket, FTP, HTTP, SMTP): 

- Enter the 

 command, e.g. AT^SISO=9.

- Enter 

, specify 

, e.g. AT^SISW=9,20. Check resulting response for 

. Optionally, check error with 

, e.g. AT^SISE=9. If necessary, repeat the

sequence several times.

- Enter last 

 command and enable 

, e.g. AT^SISW=9,0,1. 

If Socket service: Query available data with 

, e.g. AT^SISR=9,1430. 

- Check service state with 

, e.g. AT^SISI=9, if necessary several times until 

("Down"). 

- Check error with 

, e.g. AT^SISE=9. 

- Close service with 

, e.g. AT^SISC=9. 

• Download (Socket, FTP, HTTP, POP3): 

- Enter the 

 command, e.g. AT^SISO=9.

- Enter 

, specify 

, e.g. AT^SISR=9,1000. Check resulting response for

. If necessary, repeat the sequence several times until 

= -2 (end

of data) or ERROR.

- Check error with 

, e.g. AT^SISE=9. 

- Close service with 

, e.g. AT^SISC=9. 

• Socket service (upload and download possible in one session): 

- Recommended: Set 

=2 to enable extended error text. 

- Enter the 

 command, e.g. AT^SISO=9.

- Enter 

 or 

, specifying 

 or 

, e.g.

AT^SISR=9,20 or AT^SISW=9,20. Check resulting response for 

 or 

. If necessary, repeat the sequence several times. 

- Check error with 

, e.g. AT^SISE=9. 

- If write action: Enter last 

 command and enable 

, e.g. AT^SISW=9,0,1. 

If Socket service: Query available data with 

, e.g. AT^SISR=9,1430. 

- Close service with 

, e.g. AT^SISC=9. 

Test Command

AT^SISO=?

Response(s)

OK