Underground: Hacking, madness and obsession on the electronic frontier - novelonlinefull.com
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This is one of the handover messages, logged with a CCITT7 link monitor, that he saw:
13:54:46"3 4Rx< sccp="" 12-2-09-1="" 12-2-04-0="" 13="" cr="">
BSSM h.o.r.eQ
BSSMAP GSM 08.08 Rev 3.9.2 (BSSM) HaNDover REQuest (h.o.r.eQ)
-------0 Discrimination bit D BSSMAP
0000000- Filler
00101011 Message Length 43
00010000 Message Type 0x10
Channel Type
00001011 IE Name Channel type
00000011 IE Length 3
00000001 Speech/Data Indicator Speech
00001000 Channel Rate/Type Full rate TCH channel Bm
00000001 Speech Encoding Algorithm GSM speech algorithm Ver 1
Encryption Information
00001010 IE Name Encryption information
00001001 IE Length 9
00000010 Algorithm ID GSM user data encryption V. 1
******** Encryption Key C9 7F 45 7E 29 8E 08 00
Cla.s.smark Information Type 2
00010010 IE Name Cla.s.smark information type 2
00000010 IE Length 2
-----001 RF power capability Cla.s.s 2, portable
---00--- Encryption algorithm Algorithm A5
000----- Revision level
-----000 Frequency capability Band number 0
----1--- SM capability present
-000---- Spare
0------- Extension
Cell Identifier
00000101 IE Name Cell identifier
00000101 IE Length 5
00000001 Cell ID discriminator LAC/CI used to ident cell
******** LAC 4611
******** CI 3000
PRIority
00000110 IE Name Priority
00000001 IE Length 1
-------0 Preemption allowed ind not allowed
------0- Queueing allowed ind not allowed
--0011-- Priority level 3
00------ Spare
Circuit Ident.i.ty Code
00000001 IE Name Circuit ident.i.ty code
00000000 PCM Multiplex a-h 0
---11110 Timeslot in use 30
101----- PCM Multiplex i-k 5
Downlink DTX flag
00011001 IE Name Downlink DTX flag
-------1 DTX in downlink direction disabled
