BGS2T AT Command Set
10.6 AT^SISO
BGS2T_ATC_V01.301 Page 266 of 554 1/31/12
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• As in polling mode no error URCs are available you are advised to integrate the commands AT^SISI and
AT^SISE into the command sequences for upload and download jobs. So, the AT^SISO command may be
followed by AT^SISI to check that the service has entered the <srvState>=4 before sending AT^SISR,
AT^SISW or AT^SIST. This helps you to detect errors even though the "^SIS" URCs are disabled. A typical
example is that the service fails to be opened because the service profile contains a wrong destination
address. In such a case, after opening with AT^SISO and OK response, the service quickly enters the states
<srvState>=2, 4 and 6, with an error being returned no earlier than after sending the first AT^SISR or
AT^SISW command. In URC mode, an error URC, such as "Host not found" would be received in this situa-
tion, but in polling mode the only way to detect the state is using AT^SISI or, alternatively, AT^SISO.
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