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The USSD command format:
C_USDXY,<COMMAND>,<Number >,
X - The number of the slave card (from 1 to 4).
Y - The number of the module in the slave card (from 1 to 4).
"COMMAND" – is the operation mode.
COMMAND: 1 = start session
COMMAND: 2 = stop session
"Number" – is the USSD number to send.
The Reply should be:
A_USDXY,Z,<COMMAND>,<Message>,
X - The number of the slave card (from 1 to 4).
Y - The number of the module in the card (from 1 to 4).
Z –The number of the SIM (1 is local SIM, 2 is SIM Server SIM).
"COMMAND" – is the USSD reply code.
COMMAND: 0 = no further user action required
COMMAND: 1 = further user action required
COMMAND: 2 = USSD terminated by network
COMMAND: 4 = Operation not supported
"Message" – is the USSD reply message.
Here is example of sending the USSD number *101# thrghu port 1.
C_USD11,1,*101#,
OK#11
I_ALR111,49
A_USD11,1,2,"UNKNOWN APPLICATION",15
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All™ Series: 8 ❘ 16 ❘ 24 Channel Gateway User Manual
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