Siemens Brodersen MC55 AT Command Manual page 371

(num)
<sw1>
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
(num)
<sw2>
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
(str)
<response>
Response in case of a successful completion of the previously issued SIM command.
If <command>=136 (RUN GSM ALGORITHM):
MC55 returns SRES and cipher key Kc as calculated by the SIM.
Byte(s)
1 - 4
5 - 12
Example
Use <command>=136 (RUN GSM ALGORITHM) to obtain SRES and cipher key Kc values as calculated by the
SIM.
at^sxsm=136,,0,0,16,"0011223
3445566778899AABBCCDDEEFF"
^SXSM:
144,0,00112233445566778899AA
BB
OK
MC55_ATC_V04.00
Confidential / Released
Description
SRES - Signed RESponse
Kc - Cipher Key
Start SIM command "RUN GSM ALGORITHM" with 16 byte random
number.
SRES (bytes 1-4) and Cypher Key Kc (bytes 5-12) values as returned
by the SIM.
Page 371 of 475
Length
4
8
3/17/06