Siemens Brodersen MC55 AT - Manual (Page 371)

MC55_ATC_V04.00 Page 371 of 475 3/17/06
Confidential / Released
Status information from the SIM about the execution of the actual command. It is returned in both cases, on suc-
cessful or failed execution of the command.
0...255
Status information from the SIM about the execution of the actual command. It is returned in both cases, on suc-
cessful or failed execution of the command.
0...255
Response in case of a successful completion of the previously issued SIM command.
If =136 (RUN GSM ALGORITHM):
MC55 returns SRES and cipher key Kc as calculated by the SIM.
Example
Use =136 (RUN GSM ALGORITHM) to obtain SRES and cipher key Kc values as calculated by the
SIM.
(num)
(num)
(str)
Byte(s) Description Length
1 - 4 SRES - Signed RESponse 4
5 - 12 Kc - Cipher Key 8
at^sxsm=136,,0,0,16,"0011223
3445566778899AABBCCDDEEFF"
Start SIM command "RUN GSM ALGORITHM" with 16 byte random
number.
^SXSM:
144,0,00112233445566778899AA
BB
SRES (bytes 1-4) and Cypher Key Kc (bytes 5-12) values as returned
by the SIM.
OK