AT Commands Phone Terminal Terminated 32
4.6.1 Commands
AT+CSCC Secure Control Command
4.6.2 Use scenarios
Accessory Authentication
This use scenario consist of the following parts:
• The accessory requests a challenge token for command set ‘199’. (Ericsson accessories command set).
• The phone returns the challenge parameter.
• The accessory inputs challenge parameter to authentication algorithm and gets a token.
• Accessory enables command set ‘199’ with the calculated token.
• Phone compares the received token with calculated and responds OK if they are equal, or ERROR if they are
not equal.
4.6 Ensemble C22: Accessory Authentication
Description: This command is used for authentication of accessories.
Set command: AT+CSCC=<mode>,<cmd_set>[,<token>]
Set command response:+CSCC: <challenge>
Read command: AT+CSCC? Displays the current <mode>, <cmd_set>, and <token> settings.
Note: If the set command has not been executed before the read command is executed,
the read command returns "OK"
Test command: AT+CSCC=? Shows if the command is supported.
Test command
response:
+CSCC: (list of supported <mode>s),(list of supported <cmd_set>s)
Parameters:
<mode>:
<mode> Description
1 Request challenge token to enable access to specified
command set (<token> not used>)
2 Enable access to specified command set (<token> required)
<cmd_set>:
<cmd_set> Description
0-127 Reserved by ETSI
128-198 Reserved for future use
199 Command set for Ericsson accessories for 3 volt platform
200-255 Reserved for future use
<token>: 1-byte IRA string. 1-byte token from the authentication algorithm.
<challenge>: 1 byte to be converted into a token by the authentication algorithm.
AT command Response Comment
AT+CSCC=1,199 Step 1
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