XT55 AT Command Set - Wireless Data Modules

XT55 AT Command Set14.2 AT^SXSMs (num)Status information from the SIM about the execution of the actual command. It is returned in both cases, on successfulor failed execution of the command.0...255 (num)Status information from the SIM about the execution of the actual command. It is returned in both cases, on successfulor failed execution of the command.0...255 (str)Response in case of a successful completion of the previously issued SIM command.If =136 (RUN GSM ALGORITHM):XT55 returns SRES and cipher key Kc as calculated by the SIM.Byte(s) Description Length1 - 4 SRES - Signed RESponse 45 - 12 Kc - Cipher Key 8ExampleUse =136 (RUN GSM ALGORITHM) to obtain SRES and cipher key Kc values as calculated by theSIM.at^sxsm=136,,0,0,16,"0011223 Start SIM command "RUN GSM ALGORITHM" with 16 byte random3445566778899AABBCCDDEEFF"^SXSM:144,0,00112233445566778899AABBOKnumber.SRES (bytes 1-4) and Cypher Key Kc (bytes 5-12) values as returnedby the SIM.XT55_ATC_V03.03 Page 356 of 459 9/9/05Confidential / Released